01/13/2016, M3.6 near Johannesburg

Last updated October 4th, 2019

  • 13 Jan 2016 20:23:58 PST, (35.405, -117.810), depth 6.9km, 16km WNW of Johannesburg, California
  • Aftershocks: so far (14 Jan 2016, 07:21AM PST) there have been 12 aftershocks recorded, the largest M3.3. 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 9 events during the 3 days prior to the earthquake (within a 1 km radius), the largest was M2.2 (2016/01/14).
  • Historical seismicity: since our records began in 1932 we’ve had 4 events of M4 or greater within 10km of today’s event, the largest was M4.6 (1944/07/03) and the most recent was M4.4 on 31 Jan 2009.
  • Nearby faults: Garlock fault zone, central Garlock section (El Paso fault) (0.6 km), Garlock fault zone, central Garlock section (Garlock fault) (0.6 km), Garlock fault zone, central Garlock section (7.2 km) and Garlock fault zone, western Garlock section (12.8 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI.
  • Visit our special reports page for further information on local notable earthquakes.
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