Travel Time vs. Pressure (IMAGE)

DOE/Lawrence Berkeley National Laboratory

Travel Time vs. Pressure

Caption

Time delay of seismic waves was normally correlated with changes in stress due to barometric pressure (above). Two seismic events, one of magnitude 3 and another of magnitude 1, caused excursions from this relationship. The excursions were detected before the events occurred (arrows), possibly because of preseismic changes in the crack structure of the rock.

Credit

Niu et al

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