|Title||Searching for hidden earthquakes in Southern California|
|Publication Type||Journal Article|
|Year of Publication||2019|
|Authors||Ross Z.E, Trugman D.T, Hauksson E., Shearer PM|
|Type of Article||Article|
|Keywords||aftershocks driven; fault structure; landers; magnitude; mayor-cucapah earthquake; Science & Technology - Other Topics; seismicity; swarm; united-states; valley|
Earthquakes follow a well-known power-law size relation, with smaller events occurring much more often than larger events. Earthquake catalogs are thus dominated by small earthquakes yet are still missing a much larger number of even smaller events because of signal fidelity issues. To overcome these limitations, we applied a template-matching detection technique to the entire waveform archive of the regional seismic network in Southern California. This effort resulted in a catalog with 1.81 million earthquakes, a 10-fold increase, which provides important insights into the geometry of fault zones at depth, foreshock behavior and nucleation processes, and earthquake-triggering mechanisms. The rich detail resolved in this type of catalog will facilitate the next generation of analyses of earthquakes and faults.