Scientists have shown that the rules governing aftershock behavior also apply to “aftershocks” that are larger than their main shock - i.e., the possibility that the first event was a foreshock of a future larger event.
Aftershock?, Foreshock?, Earthquake cluster? only time will tell...
Earthquake map Ridgecrest 4.1 M event
Earthquake map located at: Link MapWhat Are Aftershocks, Foreshocks and Earthquake Clusters? find out at : USGS Link
The minimum magnitude ( M) values in the following bullets reflect the smallest earthquake which the network can routinely record within the region. During the previous seven-day period ending at midnight (UT) Wednesday, our seismic networks recorded
- 21 M >2.0 earthquakes in Northern and Central California (map) (within dashed polygon of figure).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.5, 6 miles SSE of Parkfield, CA at 02:44 PM UTC Sunday, 11 23, 2008 (06:44 AM PST Sunday, Nov 23, 2008).
- 24 M >1.2 earthquakes in the San Francisco Bay area (map).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.1, 6 miles NE of American Canyon, CA at 01:04 AM UTC Monday, 11 24, 2008 (05:04 PM PST Sunday, Nov 23, 2008).
- 8 M >1.2 earthquakes in the Long Valley region (map).
The largest event to occur this week in this region was a microearthquake of magnitude 1.6, 12 miles SW of Toms Place, CA at 03:17 AM UTC Saturday, 11 22, 2008 (07:17 PM PST Friday, Nov 21, 2008).
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