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EARTHQUAKE PRECURSOR RESEARCH |
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These pages indicate the detection times of recent earthquakes, as recorded by the Elfrad Group Kermadec Islands 08/15/00 04:30:09.0 UTC 31.5S 179.7E Depth= 458 Km M= 6.7
This graph indicates the electrical precursor and seismic activity, before and during this earthquake, that occurred in the Kermadec, Islands , which are located 12,745 kilometers distant. Note the precursor activity which began at 01:51:59.5 UT. These ULF electrical signals were detected 157 minutes prior to the earthquake and and were moderate in amplitude. The above graph shows data recorded for a duration of 4 hours before and during the event. Note the increase of activity in the frequency band of .02 to .04 hertz. until and during the first shock. Note the increase in amplitude compared with the D'entrecasteaux event on the 14th. This is due to two reasons. Greater event magnitude, and closer distance to the receive site.
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