Posted by EQF October 12, 2010

The main Year Chart on that Web page includes data for the years 2001 through 2010, all on one very large picture file. It is almost 400 kilobytes in size.

That chart has now been updated so that it identifies the 8 and higher magnitude earthquakes displayed on it by name and points to the line peak groups that were probably indicating that those earthquakes were about to occur.

Some of the line peak groups are at different longitudes than the earthquakes. However, I feel that in perhaps most of those cases those line peak groups were actually precursors for the earthquakes based on the fact that they appeared a month or two before a given earthquake occurred and then disappeared in a month or two afterwards.

In most cases, the fact that line peak groups are still appearing after the earthquake has occurred is due in part to the long integration period time window that are being used. They are about 90 days. And all of the EM Signals detected during that time window are averaged together. So, even a month after the earthquake has occurred, some of the signals that were detected before it occurred are still within the integration time windows.

On the charts on my Data.html Web page there are two shorter integration time windows displayed in addition to the 90 day windows, 15 and 45 days. The shorter period time windows make it possible for my forecasting computer program to respond more quickly to the most recently detected EM Signals.

One of the most unusual line peak groups on the main chart on that Year Chart Web page is the one that appeared a month before the 2007/10/31 5.6 magnitude San Francisco area earthquake. It continues after the earthquake until about a month after the devastating 2008/05/12 China earthquake that claimed many thousands of lives. So, it persisted for about 7 months.

One of my present theories proposes that the persistence of that line peak group was not associated with aftershocks for the CA earthquake. Instead it might have involved some type of strain transfer or EM Signal transfer between the approaching China earthquake and the San Francisco area fault zone.