December 5, 2005 M3.4 Quake There was a magnitude 3.4 quake yesterday, located 5 miles southeast from Lake Elsinore, CA. The quake occurred at 09:47:44 AM (PST), and was felt widely throughout the Inland Empire, from Riverside to Temecula. If you felt this quake, and would like to report it, click here. Comments Off
December 3, 2005 M4.1 Big Bear Earthquake Last night at 11:49 pm a M4.1 earthquake occurred 5 miles north of Big Bear City. It was felt lightly in the epicentral area and weakly in areas further away. Whether lightly or weakly, its shaking was felt as far north of Barstow and as far south as Temecula. Since the rate of earthquakes in that region has returned to the way it was before the M6.3 Lander's aftershock, last night's earthquake isn't really considered an "aftershock" of any sort. The area has had some activity though, during the past 10 years there have been 13 earthquakes M4.0 or greater - including a M5.4 in February 2003.
October 19, 2005 M4.2 San Clemente Island aftershock A few felt reports are trickling in (from in and around San Diego) for the M4.2 earthquake that occurred at 1:51 am this morning. Its (automatically derived) location is 19 miles southeast of San Clemente Island (from the SE tip) or 40 miles southeast from the NW tip though the location may change slightly after a seismic analyst reviews it more thoroughly at a more decent hour. This earthquake is considered to be an aftershock to the M4.9 San Clemente Island earthquake that occurred last Sunday afternoon. Comments Off
October 18, 2005 Another Cabazon Earthquake, this one, a M4.4 Well, how is that for chances? So, technically speaking that makes the M4.0 earthquake that occurred near Cabazon roughly 3 and a half hours ago a foreshock to the M4.4 earthquake that just occurred at 12:31 am. Both quakes had the same location, 6 miles north of Cabazon. As expected this event was felt a little more widely than its 8:09 pm counterpart, mainly because its magnitude is slightly larger, but also because at this later hour more people are settled and more susceptible to feeling to ground shake. We want to thank everybody for getting out of bed (at this hour) and filling out the Did You Feel It form. Your contribution is extremely helpful in determining the extent of the experienced shaking and your assistance is appreciated by all of us. Comments Off
October 17, 2005 M4.0 Cabazon Earthquake The dinosaurs were stomping tonight. At 9:08 pm, there occurred a M4.0 earthquake located 6 miles north of Cabazon. It was felt as far north as Lucerne Valley and as far south as Warner Springs. There have been two aftershocks so far (both below M2.0), and with an earthquake this size more are expected to follow though the chances of one being larger than the mainshock is only about 5%. Comments Off
October 16, 2005 Felt offshore M4.9 San Clemente Island quake. People from all the along the southern coast, from Santa Monica to the Mexican border, felt the M4.9 offshore earthquake that occured this afternoon at 2:11 pm. The earthquake was located 29 miles south-southeast from the south-east tip of San Clemente Island (49 miles from the north-west tip). Though it was felt over a widespread area, it wasnt felt more than just lightly. And by the way, offshore quakes normally have to be at least a magnitude 7 to generate tsuanamis. Needless to say this earthquake falls far short of that. Comments Off
September 22, 2005 M4.7 Mettler Earthquake of Sept. 22, 2005 There was a Mw4.7 earthquake, located 8 km (5 miles) NW from Wheeler Ridge, which occurred at 1:24:48 PM PDT, preceded by a Ml3.4 foreshock 44 seconds earlier, at 1:24:04. This quake was felt widely throughout the southern Central Valley and through the LA Basin, and was felt as far north as Fresno, as far east as Ridgecrest, as far south as Oceanside, and as far west as Goleta. To view the ShakeMap for this event, click here. If you felt this quake, and would like to report it, click here. As of 3:00PM on Sept. 22, 2005, there have been 10 aftershocks total, four of which are larger than M3.0. The largest aftershock so far is a M3.7, which occurred at 1:30:52 PM PDT. Here is the list of all of the quakes in this sequence so far: 14186608 3.4 2005/09/22 13:24:04 35 2.0 N 119 0.6 W 11.2 7 km ( 4 mi) WNW of Wheeler Ridge, CA 14186612 4.7 2005/09/22 13:24:48 35 2.6 N 119 0.9 W 11.0 8 km ( 5 mi) WNW of Wheeler Ridge, CA 14186620 1.8 2005/09/22 13:29:03 35 2.2 N 119 2.2 W 12.4 9 km ( 6 mi) WNW of Wheeler Ridge, CA 14186624 3.4 2005/09/22 13:29:47 35 2.3 N 119 1.1 W 11.2 8 km ( 5 mi) WNW of Wheeler Ridge, CA 14186628 3.7 2005/09/22 13:30:52 35 3.1 N 118 58.8 W 3.6 6 km ( 4 mi) NNW of Wheeler Ridge, CA 14186632 2.4 2005/09/22 13:34:05 35 3.6 N 119 0.2 W 13.8 8 km ( 5 mi) NW of Wheeler Ridge, CA 14186636 1.9 2005/09/22 13:36:03 35 2.6 N 119 1.4 W 13.6 8 km ( 5 mi) WNW of Wheeler Ridge, CA 14186640 3.2 2005/09/22 13:37:49 35 2.1 N 119 0.0 W 11.1 6 km ( 4 mi) WNW of Wheeler Ridge, CA 14186644 3.0 2005/09/22 13:38:21 35 2.0 N 119 0.5 W 13.4 7 km ( 4 mi) WNW of Wheeler Ridge, CA 14186660 2.4 2005/09/22 13:45:47 35 1.5 N 118 59.7 W 9.4 5 km ( 3 mi) WNW of Wheeler Ridge, CA 14186668 1.9 2005/09/22 13:55:00 35 1.7 N 119 2.2 W 16.8 9 km ( 6 mi) WNW of Wheeler Ridge, CA 14186672 2.9 2005/09/22 13:58:13 35 2.2 N 118 59.9 W 9.1 6 km ( 4 mi) NW of Wheeler Ridge, CA Number of rows returned:12 Comments Off September 21, 2005 Northern Imperial Valley Filed under: Felt Earthquakes duty @ 8:06 am The northern Imperial Valley swarm resurged on Monday at a slightly different location, with a ML3.0 at 1:09 pm, a ML3.7 at 4:00 pm & a ML3.1 at 11:02 pm. There was another ML2.9 at 11:42 am on Tuesday. This activity was located about 1 mile west of the tiny town of Niland, a few km east-northeast of the original Obsidian Butte activity. No-one has reported feeling any of these quakes.
September 9, 2005 Lytle Creek earthquake Filed under: Felt Earthquakes duty @ 7:42 am At 6:48 am this morning, a ML3.3 quake occurred in the Lytle Creek area, 2 miles west of Devore. It was felt in the Inland Empire & the Victorville area. ------------------------------------------------------------------------------ September 3, 2005 Quake felt in San Diego area Filed under: Felt Earthquakes duty @ 12:15 am At 11:53 pm Friday, there was a ML3.9 quake located just south of the U.S./Mexico border, 11 miles southeast of Chula Vista or 22 miles southeast of San Diego. Felt reports are coming into from the San Diego as far away as Valley Center & Temecula. Because it is in a different location, this quake is not an aftershock or a member of the Obsidian Butte sequence. Comments (0) ------------------------------------------------------------------------------ September 2, 2005 Swarm developments Filed under: Felt Earthquakes, Significant Events duty @ 12:07 pm The most significant development in the Obsidian Butte swarm overnight was a Mw5.1, which occurred at 6:27 pm & was felt widely over the southernmost part of California. It was preceded by less than 2 seconds by a quake of approximately M4.5. There were also a number of M3+ quakes during the evening: 6:23 pm, ML3.0 6:27 pm, ML4.5 6:27 pm, Mw5.1 6:30 pm, ML3,8 6:38 pm, ML3.0 7:46 pm, ML3.7 8:46 pm, ML3.2 8:50 pm, ML3.1 8:54 pm, ML3.3 8:55 pm, ML3.3 11:44 pm, ML3.4 As of 3:33PM PDT, September 2, 2005, there have been 554 events total for this swarm. Of those 554 events& 554 were M 1.0 or larger 552 were M 2.0 or larger 33 were M3.0 or larger 8 were M4.0 or larger 1 were M5.0 or larger The list below is of all M3.0 events, with the locations and times shown: 14177376 3.1 2005/08/29 00:39:45 33 12.5 N 115 35.5 W 3.7 6 km ( 4 mi) NE of Obsidian Butte, CA 14177900 3.7 2005/08/31 08:35:37 33 11.3 N 115 36.3 W 4.5 4 km ( 2 mi) NE of Obsidian Butte, CA 14177960 3.4 2005/08/31 09:18:47 33 11.4 N 115 36.0 W 3.5 4 km ( 3 mi) ENE of Obsidian Butte, CA 14178132 3.1 2005/08/31 14:49:01 33 10.7 N 115 37.3 W 4.0 2 km ( 1 mi) NE of Obsidian Butte, CA 14178156 3.1 2005/08/31 15:17:14 33 10.2 N 115 37.1 W 4.5 2 km ( 1 mi) E of Obsidian Butte, CA 14178180 3.5 2005/08/31 15:45:49 33 10.3 N 115 37.3 W 4.3 1 km ( 1 mi) E of Obsidian Butte, CA 14178184 4.6 2005/08/31 15:47:44 33 9.6 N 115 37.8 W 0.0 1 km ( 1 mi) SSE of Obsidian Butte, CA 14178188 4.5 2005/08/31 15:50:24 33 10.4 N 115 36.7 W 2.0 2 km ( 2 mi) E of Obsidian Butte, CA 14178192 3.2 2005/08/31 15:54:28 33 9.3 N 115 37.8 W 1.9 2 km ( 1 mi) SSE of Obsidian Butte, CA 14178204 3.1 2005/08/31 15:59:49 33 10.0 N 115 37.8 W 4.3 1 km ( 0 mi) ESE of Obsidian Butte, CA 14178212 4.1 2005/08/31 16:07:16 33 10.5 N 115 37.1 W 4.6 2 km ( 1 mi) ENE of Obsidian Butte, CA 14178236 4.3 2005/08/31 16:27:32 33 11.4 N 115 35.1 W 2.2 5 km ( 3 mi) ENE of Obsidian Butte, CA 14178244 3.4 2005/08/31 16:29:59 33 10.0 N 115 36.6 W 4.9 2 km ( 2 mi) E of Obsidian Butte, CA 14178248 4.5 2005/08/31 16:32:11 33 11.1 N 115 35.8 W 3.7 4 km ( 3 mi) ENE of Obsidian Butte, CA 14178728 3.1 2005/08/31 21:15:22 33 10.6 N 115 36.9 W 7.7 2 km ( 1 mi) ENE of Obsidian Butte, CA 14179056 3.1 2005/09/01 01:24:27 33 10.3 N 115 37.1 W 14.4 2 km ( 1 mi) E of Obsidian Butte, CA 14179288 3.5 2005/09/01 06:48:25 33 10.2 N 115 37.3 W 4.4 1 km ( 1 mi) E of Obsidian Butte, CA 12216915 3.6 2005/09/01 06:50:09 33 10.2 N 115 37.9 W 4.3 1 km ( 0 mi) E of Obsidian Butte, CA 14179292 4.4 2005/09/01 06:50:20 33 10.7 N 115 38.0 W 0.0 1 km ( 1 mi) NNE of Obsidian Butte, CA 14179300 3.2 2005/09/01 07:06:31 33 12.2 N 115 36.0 W 2.2 5 km ( 3 mi) NE of Obsidian Butte, CA 12217067 4.5 2005/09/01 18:27:18 33 10.5 N 115 37.9 W 4.9 1 km ( 0 mi) NE of Obsidian Butte, CA 14179736 5.1 2005/09/01 18:27:19 33 9.6 N 115 38.2 W 9.8 1 km ( 1 mi) S of Obsidian Butte, CA 14179740 3.8 2005/09/01 18:30:32 33 9.5 N 115 39.8 W 4.5 3 km ( 2 mi) WSW of Obsidian Butte, CA 14179924 3.7 2005/09/01 19:46:35 33 9.2 N 115 38.8 W 4.8 2 km ( 1 mi) SSW of Obsidian Butte, CA 14180052 3.2 2005/09/01 20:46:48 33 9.2 N 115 39.5 W 6.0 3 km ( 2 mi) SW of Obsidian Butte, CA 14180060 3.1 2005/09/01 20:50:18 33 9.4 N 115 39.3 W 6.0 2 km ( 1 mi) SW of Obsidian Butte, CA 14180072 3.3 2005/09/01 20:54:52 33 8.8 N 115 39.0 W 10.0 3 km ( 2 mi) SSW of Obsidian Butte, CA 14180076 3.3 2005/09/01 20:55:41 33 7.8 N 115 39.3 W 10.0 5 km ( 3 mi) SSW of Obsidian Butte, CA 14180324 3.4 2005/09/01 23:44:28 33 10.6 N 115 37.0 W 4.7 2 km ( 1 mi) ENE of Obsidian Butte, CA Comments Off ------------------------------------------------------------------------------ August 31, 2005 The swarm escalates Filed under: Felt Earthquakes duty @ 4:03 pm The Obsidian Butte swarm is continuing this afternoon, with an escalation in the rate of small earthquakes & in the magnitudes that are occurring. At 2:49 pm & 3:17 mw, we saw a ML3.2 & an ML3.1. At 3:45 pm there was a ML3.4, followed closely by a pair of ML4.4 events. These occurred at 3:47 pm & 3:50 pm. All the locations are in the same area northeast of Obsidian Butte. Swarms such as this are not uncommon in the Imperial Valley & similar sequences of events have occurred near Obsidian Butte. Comments Off More Obsidian Butte Filed under: Felt Earthquakes duty @ 8:45 am The swarm continues. Overnight there were nine more small quakes in the northern Imperial Valley, culminating in a ML3.6 at 8:35 am. The locations are still about 2 miles east-northeast of Obsidian Butte, along the shore of the Salton Sea. A ML3.6 is quite feelable. Comments (0) ------------------------------------------------------------------------------ August 29, 2005 Northern Imperial Valley Filed under: Felt Earthquakes duty @ 7:56 am A small handful of quakes occurred overnight in the northern Imperial Valley, in the Salton Sea Wildlife Refuge, 3 miles northeast of Obsidian Butte. The largest two were a ML3.1 at 12:39 am & a ML3.0 at 12:41 am. We have not felt reports, but both were probably feelable. Comments (0) ------------------------------------------------------------------------------ August 26, 2005 Felt quakes overnight Filed under: Felt Earthquakes duty @ 6:59 am A small quake, ML2.6, was felt overnight in the Goleta, Santa Barbara & Lompoc areas. The time was 11:18 pm & the epicenter was located offshore, 3 miles south-southeast of Isla Vista. Early this morning, at 6:45 am, there was a ML3.0 quake in the complex San Jacinto fault zone, in a sparsely inhabited area 6 miles east-northeast of Ocotillo Wells. It was probably felt, but so far we have no reports. Comments (0) ------------------------------------------------------------------------------ August 25, 2005 Felt in Carpinteria Filed under: Felt Earthquakes duty @ 6:43 am A few people felt a ML2.8 quake last night in Carpinteria. The time was 10:38 am & the epicenter was located 4 miles east of Carpinteria. Comments (0) ------------------------------------------------------------------------------ August 24, 2005 Small Yucaipa quake Filed under: Felt Earthquakes duty @ 6:53 am A ML2.9 quake was felt by a few people at 7:46pm last night (Tuesday), in Yucaipa & Redlands. The epicenter was located 2 miles east of Yucaipa. Comments (0) ------------------------------------------------------------------------------ August 19, 2005 Small cluster in San Gabriel Valley Filed under: Felt Earthquakes duty @ 9:06 am Overnight, there was a small cluster of small earthquakes in the Irwindale area, just west of the Santa Fe Dam recreation area. The largest ones were a pair of ML2.4s at 11:08 pm & 12:01 pm. There were also ML2.3s at 3:55 am & 4:21 am. The focal mechanisms are strike-slip. Nine events were recorded in all. I have a very small handful of felt reports for the ML2.4s, from Bradbury & Monrovia. Comments Off ------------------------------------------------------------------------------ August 15, 2005 3.7 Baja quake Filed under: Uncategorized, Felt Earthquakes duty @ 3:24 pm At 3:00 pm this afternoon, there was a ML3.7 quake south of the U.S./Mexico border, 56 miles south-southwest of Calexico or 64 miles south of El Centro. It is too far south to be visible on the Recent Earthquakes maps, but might possibly have been felt in the Imperial Valley. ------------------------------------------------------------------------------ August 9, 2005 Discovery sonic boom Filed under: Felt Earthquakes duty @ 7:16 am As most of you have probably figured out by now, the big noise in the Ventura to Edwards AFB area at about 5:06 this morning was NOT an earthquake. It was the sonic boom from the successful landing of the space shuttle Discovery. Comments (0) ------------------------------------------------------------------------------ August 5, 2005 M4.2 Olancha Earthquake - Friday, August 5, 2005 Filed under: Felt Earthquakes, Large Events Anthony Guarino @ 11:03 pm There was a M4.2 earthquake, located 9 miles SSW of Olancha, CA at 10:40PM (PDT) on Friday, August 5, 2005. This event was felt in the epicentral area, and may have been felt as far away as Bakersfield, Lone Pine, Little Lake, Trona, and Independence. The ShakeMap for this event may be viewed by clicking here. If you felt this quake, and would like to report it, click here. The mainshock was preceded by two foreshocks of magnitude M1.9 and M1.6, respectively. The mainshock was followed by several small aftershocks, some of which have been listed below: M 3.0 2005/08/05 22:42:24 15 km ( 9 mi) SSW of Olancha, CA M 1.8 2005/08/05 22:45:27 16 km (10 mi) SSW of Olancha, CA M 1.9 2005/08/05 22:46:20 16 km (10 mi) SSW of Olancha, CA M 1.8 2005/08/05 22:45:27 16 km (10 mi) SSW of Olancha, CA M1.8 2005/08/05 22:46:54 15 km ( 9 mi) SSW of Olancha, CA Comments Off ------------------------------------------------------------------------------ July 22, 2005 small quake off Palos Verdes Filed under: Uncategorized, Felt Earthquakes duty @ 2:30 pm There was a small earthquake, ML2.9 offshore of Palos Verdes at 11:36 am today. The epicenter was located 12 miles south-southwest of Palos Verdes Point. ------------------------------------------------------------------------------ July 14, 2005 Mojave cluster A small cluster of quakes occurred overnight in the eastern Mojave Desert, 6 miles east of Ludlow. There were 14 of them, the largest 2 both being ML3.1. The ML3.1s were at 7:15 pm & 7:32 pm. This activity is about 15 miles east of the Hector Mines aftershocks zone, so they should not be considered aftershocks. So far there are no reports of the quakes being felt. ------------------------------------------------------------------------------ July 2, 2005 ML2.2 felt in Long Beach Yesterday afternoon (Friday) at 4:08 pm, a small quake of ML2.2 was felt by a few people in Long Beach & Lakewood. The epicenter was located 3 miles northwest of Seal Beach. ------------------------------------------------------------------------------ June 27, 2005 ML4.0 Yucaipa aftershock The largest aftershock of the June 16 Yucaipa earthquake occurred at at 3:17 pm today. The magnitude was ML4.0 & the epicenter was located 2 miles north-northeast of Yucaipa, very close to the Mw4.9 mainshock. Unlike the mainshock, however, todays quake has a strike-slip focal mechanism. Today's quake was widely felt from Orange County to the Mojave Desert. ------------------------------------------------------------------------------ June 24, 2005 Small Tehachapi area quake At 9:36 am this morning, a ML3.1 quake was felt in Bear Valley Springs, Keene & Tehachapi. The epicenter was located 1 mile northeast of Bear Valley Springs, or 26 miles east-southeast of Bakersfield. There was a ML2.5 aftershock at 9:40 am. ------------------------------------------------------------------------------ June 23, 2005 Small Marina Del Rey quake A ML2.8 quake occurred overnight, at 3:32 am & was felt along the coastal areas from Torrance to Santa Monica. The epicenter was in the Ballona Creek area 2 miles east of Marina Del Ray. ------------------------------------------------------------------------------ June 16, 2005 M3.4 Anza aftershock At 8:24 this evening a M3.4 aftershock of the M5.2 Anza earthquake occurred 9 miles east-southeast of Anza. It was felt lightly in the epicentral area. To see a map showing the extent of reported shaking click here. ------------------------------------------------------------------------------ Mw4.9 Yucaipa Earthquake of 6/16/05 At 1:56 PM local time (PDT), there was a magnitude 4.9 eathquake located 2 miles northeast of Yucaipa, CA. This earthquake was felt sharply in the epicentral area and west to the San Gabriel Valley, and was felt as far away as Scottsdale, AZ to the east, the US/Mexico Border to the south, and Ridgecrest, CA to the north. To view the SCSN Special Report for this earthquake, click here. To view the ShakeMap for this event, click here. If you felt this quake, and would like to report it, click here. ------------------------------------------------------------------------------ June 15, 2005 M7.2 Earthquake off Northern California Coast, 90 Miles WSW of Eureka At 7:50PM local time (PDT) last night (6/14/05), there was a M7.2 earthquake located 91 miles (147 km) WSW of Eureka, CA, off the coast of northern California. Although out of the SCSN network, this event was felt in portions of Southern California, and therefore will be included in the commentary. This earthquake was felt widely throughout OR, WA, and CA, and felt as far north as Seattle, WA, as far south as Los Angeles, CA, and as far east as Susanville, CA. If you felt this quake, and would like to report it, or to view the CIIM map of felt reports, click here. The event focal mechanism shows evidence of horizontal strike slip motion, which is generally not the type of motion associated with tsunamigenesis (i.e. events that generate a tsunami). Tsunamigenesis usually involves some type of vertical ground motion of the sea floor, and generally occurs when significant uplift has occurred on the ocean floor, thereby displacing the water above, and in turn creating a tsunami. This quake triggered the West Coast Tsunami Warning System to issue a tsunami watch for the west coast of the US, from British Columbia, Canada south to the California/Mexico border. A destructive tsunami was NOT generated, and therefore the tsunami watch was cancelled and an all-clear was issued soon after the original bulletin issued. To learn more about tsunamis, and what to do in the event of a tsunami warning, please visit West Coast/Alaska Tsunami Warning Center at http://wcatwc.arh.noaa.gov/. To learn more about this quake, please visit the California Integrated Seismic Network at www.cisn.org. ------------------------------------------------------------------------------ June 12, 2005 Mw5.2 Anza Earthquake of June 12, 2005 11:02 am A Mw5.2 earthquake occurred at 8:41AM PDT, 6 miles ESE of Anza, CA. This earthquake was felt sharply in the epicentral area, and was felt as far away as Yuma, AZ to the east, Ventura/Santa Barbara to the north, and the US/Mexico border to the south (and into Baja California). It was located within the complicated San Jacinto fault zone, which is approximately 5 km wide, and is a member of the San Andreas fault zyztem. The hypocenter was located approximately 13.5 km (8.4 miles) deep. ------------------------------------------------------------------------------ 09:07 PDT Tuesday, May 31 At 11:30 am on Sunday (5/29), there was a ML3.8 quake offshore of San Diego (24 miles west of Imperial Beach). Dispite its location offshore, several people in the San Diego & surrounding areas felt it. -------------------------------------------------------------------------------- 17:42 PDT Thursday, May 26 We have recorded and located 154 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 20:23 PDT Friday, May 20 To view the new SCSN Commentary, which is in beta test mode, click here. -------------------------------------------------------------------------------- 19:43 PDT Friday, May 20 A magnitude 4.2 earthquake occurred May 20 at 05:39:32 PDT. It was on the San Jacinto Fault, 45 mi SSE of Palm Springs and was felt as far north as Riveside. At this time, 2 hours after the event, there have been no aftershocks. A M2.3 occurred about an hour later and about 6 miles due East, but the preliminary location indicates that it is not an aftershock. -RSD. -------------------------------------------------------------------------------- 17:18 PDT Thursday, May 19 We have recorded and located 311 earthquakes in the last week. -------------------------------------------------------------------------------- 13:30 PDT Monday, May 16 Parkfield had experienced a couple of felt earthquakes in the last 24 hours. There was a Mw4.4 at 12:24 am this morning, 3 miles northwest of Parkfield (in about the middle of the 2004 rupture zone). There was also a ML3.0 slightly to the northwest of that (4 miles northwest of Parkfield), at 12:38 pm today, followed by a ML3.2 at 12:50 pm. Meanwhile, the Baja swarm continues, with a ML3.4 at 10:20 am on Friday, a ML3.1 at 3:32 am Saturday, a ML3.0 at 11:34 am Sunday & a ML3.2 at 10:34 am today (plus many smaller ones). These quakes are not being felt in the U.S. as far as we know. -------------------------------------------------------------------------------- 13:11 PDT Friday, May 13 At 10:20 am this morning, the on-going Baja swarm produced a ML3.5 quake, a few miles to the southeast of the others so far. -------------------------------------------------------------------------------- 17:04 PDT Thursday, May 12 We have recorded and located 281 earthquakes in the last week. -------------------------------------------------------------------------------- 21:23 PDT Monday, May 09 A swarm of earthquakes began at 9:53AM PDT, approximately 20 miles SSE of Calexico, and has included a M3.0 at 2:48PM PDT, a M3.1 at 9:01PM PDT, a M3.1 at 9:19PM PDT, and a M3.2 at 10:18PM PDT. These events may have been felt in areas near the border at Calexico. -------------------------------------------------------------------------------- 15:31 PDT Monday, May 09 Two M3+ quakes have occurred today: a ML3.2 at 10:48 am in the Hector Mines aftershock zone, 9 miles northwest of Ludlow (or 34 miles south-southeast of Baker). The other was a ML3.1 at 2:48 pm, in Mexico 18 miles southeast of Calexico. Neither has generated any interest from the public. -------------------------------------------------------------------------------- 08:22 PDT Friday, May 06 The largest "action" overnight was a ML4.1 quake in the Wheeler Ridge area north of the Grapevine grade, at 7:29 pm. The location was actually about 12 miles west-southwest of Mettler. The quake was felt fairly widely in the Tejon Pass and Bakersfield areas. There were also a few small quakes along the coast about 5 miles west of Isla Vista. The largest was a ML2.8 at 12:32 am. There were felt reports from Goleta & Santa Barbara. -------------------------------------------------------------------------------- 17:27 PDT Thursday, May 05 We have recorded and located 227 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 07:23 PDT Wednesday, May 04 At 2:30 am this morning, a ML2.9 quake occurred offshore, 21 miles west of Avalon, Catalina Island. It is likely to have been felt by insomniacs on Catalina, but we have no such reports so far. -------------------------------------------------------------------------------- 13:24 PDT Friday, April 29 At 1:06 pm this afternoon, there was a ML2.8 quake felt on the West Side & in San Fernando Valley. The epicenter was located in the Santa Monica Mtns., 5 miles south-southwest of Encino, or 6 miles north-northwest of Santa Monica. -------------------------------------------------------------------------------- 17:03 PDT Thursday, April 28 We have recorded and located 168 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 15:00 PDT Sunday, April 24 A pair of offshore earthquakes, a ML3.6 and a ML3.3, occurred 16 miles south of Malibu, or 13 miles west of Palos Verdes Point, at 2:44 and 2:46 pm respectively. Both were felt along the coast of Los Angeles and Orange counties with reports of it being felt as far inland as Northridge. -------------------------------------------------------------------------------- 19:38 PDT Friday, April 22 Many people in San Bernardino county felt the ML3.4 earthquake that occurred 2 miles west of the city of San Bernardino at 7:19 pm this evening. It was reportedly felt as far north as Wrightwood and as far south as Murrieta, a city just north of Temecula. -------------------------------------------------------------------------------- 16:59 PDT Thursday, April 21 We have recorded and located 226 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 06:57 PDT Thursday, April 21 Another offshore earthquake has occurred this morning, at 6:26 am. It was a ML3.8 quake, 20 miles south-southeast of Santa Rosa Island, at the same location as last night's ML4.0. This morning's quake is an aftershock. As with the quake last night, we do not really expect any "felt reports" due to the location. -------------------------------------------------------------------------------- 00:43 PDT Thursday, April 21 Just before midnight, at 11:36 pm yesterday, a M4.0 earthquake occurred 20 miles (33 km) south-southeast of Santa Rosa Island (one of the Channel Islands). Due to its remote location, reports of it being felt on the mainland are not expected and that is what we are seeing at this time. -------------------------------------------------------------------------------- Wednesday, April 20 There was a ML3.6 quake this afternoon, at 3:40 pm, located 10 miles west-northwest of Frazier Park. -------------------------------------------------------------------------------- 12:50 PDT Wednesday, April 20 At 11:48 pm last night, there was a ML3.0 quake offshore, 26 miles west of San Diego. We have received a few isolated felt reports from the greater San Diego area. -------------------------------------------------------------------------------- 12:42 PDT Saturday, April 16 Just after 12:18 pm, there was a moderate quake located 13 miles west of Wheeler Ridge. The ML 5.1 event was reported felt from Bakersfield down through Los Angeles County and in parts of Orange County, with no reports of damage or injury. To view the SCSN Special Report, click here. -------------------------------------------------------------------------------- 17:06 PDT Thursday, April 14 We have recorded and located 155 earthquakes in the last week. -------------------------------------------------------------------------------- 07:13 PDT Tuesday, April 12 The San Diego quake's magnitude has been revised to ML3.9 based on more in-depth analysis of the data. -------------------------------------------------------------------------------- 04:28 PDT Tuesday, April 12 Early this morning, at 4:06 am, a quake jolted awake many people in the greater San Diego area. It was a ML4.0 quake, located 3 miles east of Jamul, or about 9 miles east-southeast of El Cajon. Felt reports are coming in now, with the farthest so far being the Temecula area. The focal mechanism is strike-slip. The quake was followed 4 minutes later by a ML2.4 aftershock. -------------------------------------------------------------------------------- 17:05 PDT Thursday, April 07 We have recorded and located 161 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 16:06 PST Thursday, March 31 We have recorded and located 131 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 12:13 PST Thursday, March 31 At 11:13 am today, there was a small quake, ML3.2, located in the Tehachapi Mtns., 15 miles north-northwest of Tehachapi. The focal mechanism is strike-slip. There have been a couple of felt reports. -------------------------------------------------------------------------------- 16:32 PST Thursday, March 24 We have recorded and located 135 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 16:22 PST Tuesday, March 22 Late this afternoon (4:07 pm), there was aa ML3.4 quake offshore, 4 miles west of Manhattan Beach. Felt reports are coming from as far as Newbury Park & Palos Verdes. -------------------------------------------------------------------------------- 12:47 PST Tuesday, March 22 A small cluster of earthquakes was centered yesterday & overnight, about 7 miles east-northeast of Borrego Springs. The largest was a ML3.7 at 12:55 am. This event was felt in the Borrego Springs area. -------------------------------------------------------------------------------- 16:43 PST Thursday, March 17 We have recorded and located 125 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 13:07 PST Monday, March 14 About 23 minutes after noon we had a ML3.6 earthquake 6 miles (10 km) west-northwest of Valencia. It was felt lightly (Modified Mercalli III) in the epicentral area of Santa Clarita Valley. It was felt as north as Frazier Park and as south as El Segundo. -------------------------------------------------------------------------------- 17:27 PST Sunday, March 13 We had a M3.5 quake today, located 4 miles south from the Mt. Palomar Observatory. This event was felt widely throughout San Deigo county, from Boulevard to the south, to San Clemente and Hemet to the north. -------------------------------------------------------------------------------- 16:28 PST Thursday, March 10 We have recorded and located 148 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 16:21 PST Thursday, March 03 We have recorded and located 191 earthquakes in the last week. -------------------------------------------------------------------------------- 21:42 PST Saturday, February 26 At 9:08 pm, there was a Ml2.9 event located near Encino. The event was reported felt throughout the San Fernando Valley, as well as Santa Monica and Marina del Rey. -------------------------------------------------------------------------------- 16:08 PST Thursday, February 24 We have recorded and located 138 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 16:11 PST Thursday, February 17 We have recorded and located 183 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 15:44 PST Thursday, February 17 A small quake was felt this afternoon in Long Beach. It occurred at 3:02 pm & had a magnitude of ML2.5. The epicenter was located about 1 mile south of Signal Hill. -------------------------------------------------------------------------------- 14:41 PST Tuesday, February 15 At 2:20 pm this afternoon, a ML3.4 Hector Mines quake occurred in the Mojave desert. The epicenter was 8 miles northwest of Ludlow, or 44 miles east of Barstow. This is a very sparsely populated area, so we may or may not receive any felt reports. Within three minutes after the ML3.4, there was a ML4.4 quake about south of the U.S./Mexico border, about 80 miles south of Ocotillo. This is too far south to show on the "Recent Earthquakes" map, but it may have been felt in southern Imperial Valley. -------------------------------------------------------------------------------- 06:55 PST Tuesday, February 15 A very small quake (ML2.3) was felt yesterday morning Pacoima and Sylmar. The time was 3:32 am & the epicenter was located 2 miles east-northeast of Pacoima. -------------------------------------------------------------------------------- 16:06 PST Thursday, February 10 We have recorded and located 180 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 08:15 PST Wednesday, February 09 There was a small quake at 9:35 am yesterday, 17 miles north of Barstow. Magnitude was ML3.0. The quake has not been reported felt. -------------------------------------------------------------------------------- 16:20 PST Thursday, February 03 We have recorded and located 178 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 08:18 PST Thursday, February 03 A ML3.2 was felt in the Inland Empire area last night at 8:52 pm. The epicenter was located 4 miles north-northeast of Fontana. Felt reports were received from as far away as Victorville & Irvine. Peak intensity in the epicentral area was Modified Mercalli III. There have been a few small aftershocks, all less tha M2.0. -------------------------------------------------------------------------------- 07:37 PST Friday, January 28 A ML2.9 quake was felt yesterday afternoon at 2:48 pm, in the northern Orange County areas: Yorba Linda, Fullerton, Orange, Anaheim, Santa Ana, etc. as well as Whittier, La Habra, Chino & Ontario. The epicenter was located 3 miles southeast of La Habra. Early this morning, there was a ML4.0 quake near Coalinga. This is in the area covered by Northern California, but we mention it because of its size. The time was 5:03 am & the quake was located 5 miles east-northeast of Avenal or 9 miles east-southeast of Coalinga. -------------------------------------------------------------------------------- 16:30 PST Thursday, January 27 We have recorded and located 213 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 16:15 PST Thursday, January 20 We have recorded and located 168 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 16:17 PST Thursday, January 13 We have recorded and located 188 earthquakes in the last week. Click here to see a summary and a map. -------------------------------------------------------------------------------- 06:57 PST Wednesday, January 12 Just after midnight, a light quake shook the desert. At 12:10 am, there was a ML4.3 event located 6 miles east of Desert Hot Springs. The focal mechanism shows strike-slip motion, with a strike consistent with a series of small faults to the east of the San Andreas. The quake was reported felt as far west as the Inland Empire & as far southwest as Temecula. All aftershocks so far have been less than magnitude 2.0. There was also a ML2.7 in the Inland Empire at 5:49 pm yesterday that was felt. It occurred 6 miles north-northeast of Beaumont. -------------------------------------------------------------------------------- 08:53 PST Tuesday, January 11 A pair of ML2.8 quakes occurred in the Tehachapi Mtns. overnight, both about 1 mile southeast of Keene, or 15 miles northwest of Tehachapi. The first was at 6:47 pm last night & the other was at 12:37 am. Both were reported felt in Tehachapi, Bear Valley Springs & surrounding communities. -------------------------------------------------------------------------------- 16:27 PST Thursday, January 06 We have recorded and located 185 earthquakes in the last week. -------------------------------------------------------------------------------- 06:39 PST Thursday, January 06 We appear to be having an earthquake swarm about 2 miles northeast of Fontana. The largest ones so far have been a ML3.1 at 12:49 am on Tuesday, ML3.6 at 4:11 am, ML3.3 at 6:22, and a ML4.4 at 6:35. All of these M3+ events have been felt throughout the Inland Empire. We will post more details later in the day. -------------------------------------------------------------------------------- 04:35 PST Thursday, January 06 At 4:11 this morning, there was a ML3.6 event located 2 miles NNE of Fontana. This is the second light quake to wake the area in the past few nights. -------------------------------------------------------------------------------- 07:57 PST Wednesday, January 05 Another very small quake was felt yesterday evening, at 8:11 pm. This quake had a magnitude of ML2.2 & was located under the town of Hawthorne. It has been reported felt in El Segundo, Hermosa Beach, Lawndale, Manhattan Beach & Inglewood. -------------------------------------------------------------------------------- 07:56 PST Tuesday, January 04 A small quake was felt overnight, at 12:21 am. Magnitude was ML2.7 & the epicenter was located 1 mile northeast of Fontana. We have reports that it was felt in Rialto & Fontana. -------------------------------------------------------------------------------- 13:10 PST Sunday, January 02 Happy New Year! On Sunday, January 2, 2005, at 12:58:48 PM local time, we had a M4.0 earthquake, located 26 miles southeast of Calexico. This quake was just across the US/Mexico border, but was felt in Calexico, El Centro, and surrounding area. To view the ShakeMap for this event, click here. If you felt this quake, and would like to report it, click here. -AJG -------------------------------------------------------------------------------- 16:22 PST Thursday, December 30 We have recorded and located 146 earthquakes in the last week. Click here to see a summary and a map. --------------------------------------------------------------------------------
