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Mariana, Islands  04/26/2002

Minahassa Peninsula  12/09/2001

Washington 02/28/01

Kermadec Islands  08/15/00

D'Entrecast Islands  08/14/00

Michoacan, Mexico  08/09/00

Sumatra, Indonesia  06/04/00

Philippine Islands  02/13/00

Tonga Islands 01/08/00

Northern Chile  01/08/00 

 Turkey  11/12/99

Afghanistan   11/08/99

New Madrid 10/23/99

Solomon  10/19/99 

Southern Cal  10/16/99

 Alaska  10/13/99 

 Indonesia  10/10/99 

 Kamchatka 10/05/99

 Mexico  09/30/99 

 Taiwan  09/20/99 

 Turkey  08/17/99  

Mexico  06/15/1999


This page indicates the detection time of the Mariana Islands  earthquake precursor, as recorded by the Elfrad Group at the Amity, NC location

04/26/2002 13.1N 144.5E Depth 76 Km M=7.2 Mariana Islands

The graph below shows a 12 hour segment of data starting at 06:00 UTC.  A high level of activity with a frequency from .02 to .043 hertz was observed starting at 07:29:35.  The large size quake ocurred at 16:06 UTC.  Precurser signals were recorded 516 minutes, or 8.6 hours before the event.

The geomagnetic field has been very quiet the past 18 hours, with no solar flares, X-rays or magnetic anomalies.  This is one of the most profound recordings of ULF signals, preceding a large earthquake,  we have yet recorded. The distance from the detection array to the event location is 12813.7 Km or 7967 miles.

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