Researchers examining the San Andreas Fault in central California have found evidence that distant earthquakes can trigger episodes of accelerated — but still very slow — slip motion, deep on the fault.
While a sudden slip on a fault generates earthquakes capable of strong shaking, a fault can also slip slowly. Sometimes, these slow movements on a fault, known as creep events, are accompanied by a weak ground vibration known as a tectonic tremor, which can be detected on sensitive seismometers, the U.S. Geological Survey explained.
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