↳ ↑ HF Radio Propagation FAQ

  1. Are shortwave radios still used?
  2. Are shortwaves still used?
  3. At what Kp index can I see aurora? (DOCX)
  4. At what Kp index can I see aurora? (PDF)
  5. Can HF Radio Propagation be predicted?
  6. How are the current band conditions?
  7. How can propagation reports help ham radio operators?
  8. How can we forecast HF propagation conditions?
  9. How do HF propagation indices correlate with solar activity, geomagnetic activity, and space weather?
  10. How do I find out what bands are open?
  11. How do the seasons affect HF radio propagation?
  12. How do seasons affect HF radio propagation?
  13. How do solar flares cause geomagnetic storms?
  14. How do solar storms cause geomagnetic storms?
  15. How does space weather affect ham radio?
  16. How does the ionosphere affect HF Radio Propagation?
  17. How long does it take for Solar Wind to reach earth?
  18. How to determine if a band is open?
  19. What HF bands are allocated for radio amateurs?
  20. What HF bands are closed now?
  21. What HF bands are open at night?
  22. What HF bands are open now?
  23. What HF frequency should I use?
  24. What affects radio signal?
  25. What affects radio wave propagation?
  26. What are DX clusters?
  27. What are DX clusters?
  28. What are HF band conditions?
  29. What are HF band propagation conditions?
  30. What are LUF and MUF?
  31. What are LUFs?
  32. What are MUF and LUF?
  33. What are band conditions banners?
  34. What are electromagnetic waves?
  35. What are geomagnetic disturbances?
  36. What are geomagnetic indices?
  37. What are geomagnetic storms?
  38. What are ionospheric clouds?
  39. What are ionospheric conditions
  40. What are ionospheric effects?
  41. What are ionospheric models?
  42. What are ionospheric storms?
  43. What are propagation indices?
  44. What are radio blackouts?
  45. What are radio waves and how do they travel?
  46. What are radio waves?
  47. What are solar flares?
  48. What are solar indices?
  49. What are solar storms?
  50. What are space weather scales?
  51. What are sprites in Earth's atmosphere?
  52. What are sunspots?
  53. What are the HF ham bands?
  54. What are the R-S-G scales in space weather?
  55. What are the amateur radio HF band conditions?
  56. What are the basic wave propagation mechanisms?
  57. What are the causes of Sporadic E?
  58. What are the current HF Propagation Conditions?
  59. What are the current conditions on ham bands?
  60. What are the current shortwave propagation conditions?
  61. What are the different types of ionospheric propagation?
  62. What are the disadvantages of HF radio?
  63. What are the factors affecting RF propagation?
  64. What are the factors affecting ionospheric conditions?
  65. What are the factors affecting ionospheric propagation?
  66. What are the geomagnetic indices?
  67. What are the ham radio HF band conditions?
  68. What are the modes of HF radio propagation?
  69. What are the modes of radio propagation?
  70. What are the regions of the ionosphere?
  71. What are the solar indices?
  72. What are the sources of medium and large scale traveling ionospheric disturbances?
  73. What are the three modes of HF radio propagation?
  74. What bands and modes will give me voice at 5,000 kilometers?
  75. What bands are open now?
  76. What can we expect from a HF propagation model?
  77. What causes HF propagation?
  78. What causes HF propagation conditions to vary periodically in a 27-day cycle?
  79. What causes geomagnetic storms?
  80. What causes ionospheric ionization?
  81. What causes the ionosphere to form?
  82. What controls HF propagation under normal conditions?
  83. What do propagation indices mean?
  84. What does NVIS mean?
  85. What does a Grey line mean?
  86. What does it mean when a band is closed?
  87. What does the Solar Flux Index mean?
  88. What effect does the change of seasons have on HF propagation?
  89. What every ham needs to know about skywave propagation
  90. What factors influence HF radio propagation?
  91. What frequency should I use for ham radio?
  92. What ham radio band should I use?
  93. What impact do solar phenomena like sunspots and solar flares have on radio communications?
  94. What important quality does the ionosphere have?
  95. What is Earth magnetic field?
  96. What is Earth's magnetosphere?
  97. What is Earth's magnetic field?
  98. What is Earth's magnetic field?
  99. What is Earth's magnetosphere?
  100. What is geomagnetic activity?
  101. What is geomagnetic disturbance?
  102. What is geomagnetic field?
  103. What is geomagnetic storm?
  104. What is grayline propagation?
  105. What is Hale cycle?
  106. What is ham radio communication?
  107. What is Ham radio propagation?
  108. What is HF band conditions?
  109. What is HF Radio Propagation?
  110. What is HF propagation?
  111. What is HF Wave Propagation?
  112. What is HF Radio propagation conditions?
  113. What is HF radio propagation prediction?
  114. What is Ionization?
  115. What is K index?
  116. What is LUF?
  117. What is MUF? How to predict MUF?
  118. What is NVIS?
  119. What is RF propagation
  120. What is total electron content? TEC
  121. What is a geomagnetic storm?
  122. What is a good app or website to see HF propagation?
  123. What is a skywave propagation?
  124. What is an electromagnetic (EM) wave?
  125. What is fading?
  126. What is high-frequency (HF) radio?
  127. What is ionospheric propagation?
  128. What is plasma?
  129. What is radio?
  130. What is radio propagation?
  131. What is radio wave propagation?
  132. What is recombination?
  133. What is sky propagation?
  134. What Is sky wave propagation?
  135. What is skywave HF radio propagation?
  136. What is skywave propagation?
  137. What is solar activity?
  138. What is solar cycleSolar cycles: A tutorial
  139. What is solar wind?
  140. What is space weather?
  141. What is the 80 meter band?
  142. What is the D region of the ionosphere?
  143. What is the E region of the ionosphere?
  144. What is the F region of the ionosphere?
  145. What is the interplanetary magnetic field?
  146. What is the K index for propagation?
  147. What is the LUF frequency?
  148. What is the T Index?
  149. What is the bandwidth of HF radio?
  150. What is the best HF band for DX?
  151. What is the best HF band for daytime?
  152. What is the best time for the 40 meter band?
  153. What is the best time of day for HF frequencies?
  154. What is the best time of day for HF radio?
  155. What is the composition of the ionosphere?
  156. What is the current HF propagation?
  157. What is the current LUF?
  158. What is the current MUF?
  159. What is the current maximum useable frequency?
  160. What is the current minimum useable frequency?
  161. What is the current lowest usable frequency (LUF)?
  162. What is the current shortwave propagation conditions?
  163. What is the current skywave propagation conditions?
  164. What is the dead zone in radio communication?
  165. What is the difference between Earth magnetosphere and earth magnetic field?
  166. What is the difference between Earth's magnetosphere and earth's magnetic field?
  167. What is the difference between Global and Regional HF propgation conditions?
  168. What is the difference between Global versus Regional HF propgation conditions?
  169. What is the difference between Greyline and the Solar Terminator?
  170. What is the difference between geomagnetic and ionospheric storms?
  171. What is the difference between solar indices and propagation indices?
  172. What is the difference between solar indices propagation indices?
  173. What is the difference between solar proton flux and solar proton density?
  174. What is the difference between the Greyline and the Solar Terminator?
  175. What is the difference between the Magnetosphere and Earth's magnetic field?
  176. What is the farthest a ham radio can reach?
  177. What is the longest range 2 way radio?
  178. What is the lowest usable frequency?
  179. What is the magnetic field of Earth?
  180. What is the max radio range?
  181. What is the maximum usable frequency?
  182. What is the range of a 100 watt ham radio?
  183. What is the rule of thumb for HF frequency?
  184. What is the skip zone?
  185. What is the solar cycle?
  186. What is the solar flux index?
  187. What is the solar index?
  188. What is the structure of the ionosphere?
  189. What is virtual height?
  190. What radio waves actually are?
  191. What the numbers mean in propagation
  192. What to expect from our HF amateur radio bands?
  193. When are HF bands closed?
  194. When will HF band conditions improve?
  195. When will HF propagation conditions improve?
  196. When will propagation on HF improve?
  197. Where can I find solar data?
  198. Which HF bands are best during the day and which are better at night?
  199. Which Ham Band is Open Now?
  200. Which ham bands are open now?
  201. Which ionospheric region is closest to the Earth?
  202. Why are ham bands closed?
  203. Why do we need propagation forecasting?
  204. Why do we need propagation forecasts?
  205. Why does space weather affect ham radio?
  206. Why forecast HF conditions?
  207. Why is HF propagation so poor?
  208. Why is HF used for long range communication?
  209. Why is a band closed?
  210. Why is a radio band closed?
  211. Why is propagation on shortwave (HF) terrible right now?
  212. Why is shortwave used for long range communication?
  213. Why is there no activity on the HF Radio?