Yesterday's M4.8 earthquake by the Salton Sea in southern California [right, USGS] following a series of smaller events in the previous week, has seismologists wondering if this could be a foreshock for something larger.
[below, Mohawk Valley (113A) seismometer records aftershocks of yesterday's M4.8 event on the southern San Andreas fault, including a M3.6 event a
t 07:51 UTC]The series of recent small earthquakes are on the southern tip of the San Andreas fault, suggesting that a larger event would rupture from south to north, with the energy focused into southern California. We expect a north to south rupture would send more energy across Arizona.
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