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EARTHQUAKE PRECURSOR RESEARCH |
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The following pages will show the detection
times of recent worldwide earthquakes as recorded by Elfrad
Oaxaca, Mexico 30Sep99 16:31:13.0 16.1N 96.7W 33 MS=7.5
Due to this being a large quake and relatively near to the receive site, precursor activity was detected earlier than usual. The signal amplitude was very strong with the epicenter located only 2685 kilometers distant from this station. Unusual ULF activity was detected several hours before the event. The "P" and "S" markers indicate a time of 150 minutes before ground movement. Again note the transient electrical activity after the event.
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