Slide 7
These
items are
those we prepared as a list of the easiest to instrument, possibly more
reliable of the numerous precursor signal candidates, and was the result of a several-year period of studying research papers
dealing with these, and many other earthquake precursor phenomena. It was
pared down using the criteria of the last slide, and other factors.
The
items above are those where we have built instruments, and/or have done
experiments, with the primary focus still on the electromagnetic sensor.
Considerable
effort was spent on building and testing the
ion counter. I believe one of our conclusions is that it may be too delicate an instrument for
unattended deployment in the field for lengthy periods.
We
did build and calibrate a fairly sensitive electrometer from SAS plans, but
have not done any extensive tests with it.
The
next few slides will describe earlier work by professionals working with ELF
electromagnetic signal detection.