Physical Mechanism for a Temporal Decrease of the Gutenberg‐Richter b‐Value Prior to a Large Earthquake

Observations of seismicity prior to large earthquakes show that the slope of a Gutenberg‐Richter magnitude‐frequency relation, referred to as a b‐value, sometimes decreases with time to the mainshock. Yet, underlying physical processes associated with the temporal change of a b‐value remain unclear....

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