11/09/2017, M3.5 near Anza

  • 09 Nov 2017 16:23:30 PST, (33.462, -116.467), depth 7.4km, 22km ESE of Anza, California
  • Aftershocks: so far (09 Nov 2017, 05:53PM PST) there have been 5 aftershocks recorded, the largest M1.5 (smallest M0.8). More may be expected in the next few days, the largest expected is approximately 1 magnitude unit smaller than the mainshock. There is a small chance (about 5%) that a larger quake could occur, with the likelihood decreasing over time.
  • There were 29 events during the 3 days prior to the earthquake (within a 15 km radius), the largest was M3.1 (2017/11/09).
  • Historical seismicity: since our records began in 1932 we’ve had 34 events of M4 or greater with in 10km of today’s event, the largest was M5.6 (2005/06/12) and the most recent was M5.2 on 10 Jun 2016.
  • Nearby faults: San Jacinto fault zone, Anza section (Clark fault) (0.4 km), San Jacinto fault zone, Anza section (0.4 km), San Jacinto fault zone, Coyote Creek section (Coyote Creek fault) (3.2 km), San Jacinto fault zone, Coyote Creek section (3.5 km) and San Jacinto fault zone, Anza section (Buck Ridge fault) (4.3 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
  • Visit our special reports page for further information on local notable earthquakes.
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Posted in by Dr. Jennifer Andrews, Local Earthquake Tagged with: , , ,