Abstract The 2019 M 6.4 and M 7.1 Ridgecrest, California earthquake sequence provides an
ideal opportunity to study the seismicity evolution and interaction among multiple complex
fault structures. Here, we apply the matched-filter detection method to obtain a relatively
complete (magnitude of completeness≈ 0.9) and precisely relocated earthquake catalog.
The results show a short-duration (∼ 31 minutes) foreshock sequence with 28 events,
before the M 6.4 earthquake. The foreshock sequence started with a M 4.0 event and was …

Abstract The 2019 M 7.1 Ridgecrest, California earthquake ruptured in a complex multi-
segment fault system in the Eastern California Shear Zone. The mainshock was preceded by
an intense foreshock sequence, including a large M 6.4 event. The aftershocks of the M 6.4
event illuminated both NW-and NE-trending fault segments, while aftershocks of the M 7.1
event were mainly distributed along the NW direction. The different fault segments involved
in the M 6.4 and M 7.1 events provide a good opportunity to investigate how earthquake …