The focal depths suggests the activity is occurring well above the subduction zone contact between the Gorda and North American tectonic plates and within a broad belt of seismic activity recorded in the northern Sacramento Valley. This latest series of quakes highlights that this region of California is susceptible to large, damaging earthquakes and increased seismic monitoring of the region is warranted to better understand its seismic potential. A similar copy of this earthquake report was faxed the Seismo-Watch Earthquake Alert Bulletins subscribers within hours of the event. Click HERE if you are interested in receiving these reports. Feel free to browse the directory of other recent Online Seismo-Watch Earthquake Alert Bulletins .
All data are preliminary and subject to change.
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