SCSNBrawley – SCSN http://scsn-dev.gps.caltech.edu Southern California Seismic Network Thu, 16 Nov 2017 19:57:09 +0000 en-US hourly 1 https://wordpress.org/?v=4.7.2 12/31/2016, Swarm near Brawley (largest M3.9) ../../../../index.php/2017/01/03/12312016-swarm-near-brawley-largest-m3-9/ ../../../../index.php/2017/01/03/12312016-swarm-near-brawley-largest-m3-9/#respond Tue, 03 Jan 2017 17:10:03 +0000 http://scsn-dev.gps.caltech.edu/?p=1851 ]]>
  • A seismic swarm commenced on December 31st, 2016, near Brawley. So far there have been more than 250 events recorded.
  • The largest event in the swarm so far was a M3.9 on 31 Dec 2016 at 15:06:56 PST, (32.975, -115.545), depth 14.5km, 2km WSW of Brawley, California
  • 8 events over M3 have been recorded and more than 80 events over M2. More than 250 events over M0.5 have been recorded.
  • Cumulative number of events over time (top) and event magnitudes over time (bottom) for the swarm near Brawley.



    Map showing events in the swarm near Brawley coloured by time (blue early, red late) and sized by magnitude. The star marks the largest (M3.9) event in the cluster. Faults are shown as grey lines. Historical seismicity above M4.5 is marked by grey stars and magnitude values.


  • Historical seismicity: since our records began in 1932 we’ve had 22 events of M4 or greater within 10km of today’s event, the largest was M5.8 (1979/10/16) and the most recent was M4.2 on 28 Aug 2012.
  • Nearby faults: Imperial fault (3.9 km), Brawley seismic zone (Brawley fault zone) (6.7 km), San Jacinto fault zone, Superstition Hills section (Superstition Hills flt) (13.6 km) and San Jacinto fault zone, Superstition Hills section (Wienert fault) (14.3 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI.
  • Visit our special reports page for further information on local notable earthquakes.
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    07/07/2016, M3.8 near Brawley ../../../../index.php/2016/07/07/07072016-m3-8-event-near-brawley/ ../../../../index.php/2016/07/07/07072016-m3-8-event-near-brawley/#respond Thu, 07 Jul 2016 13:44:12 +0000 http://scsn-dev.gps.caltech.edu/?p=1568 ]]>
  • 07 Jul 2016 05:55:24 PDT, (32.912, -115.535), depth 11.1km, 7km S of Brawley, California
  • Aftershocks: so far (08 Jul 2016, 03:18PM PDT) there have been 19 aftershocks recorded, M2.1. 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.
  • Historical seismicity: since our records began in 1932 we’ve had 45 events of M4 or greater within 10km of today’s event, the largest was M5.8 (1979/10/16) and the most recent was M4.3 on 26 Aug 2012.
  • Nearby faults: Imperial fault (0.5 km), Brawley seismic zone (Brawley fault zone) (5.1 km), Brawley seismic zone (6.3 km), San Jacinto fault zone, Superstition Hills section (Wienert fault) (11.2 km) and San Jacinto fault zone, Superstition Hills section (Superstition Hills flt) (11.8 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI.
  • Visit our special reports page for further information on local notable earthquakes.
  • ]]>
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    06/21/2016, M3.9 near Brawley ../../../../index.php/2016/06/21/06212016-m3-9-event-near-brawley/ ../../../../index.php/2016/06/21/06212016-m3-9-event-near-brawley/#respond Tue, 21 Jun 2016 22:04:46 +0000 http://scsn-dev.gps.caltech.edu/?p=1564 ]]>
  • 21 Jun 2016 14:55:47 PDT, (32.973, -115.572), depth 14.8km, 4km W of Brawley, California
  • Aftershocks: so far (21 Jun 2016, 03:57PM PDT) there have been 9 aftershocks recorded, the largest M2.4. 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.
  • Historical seismicity: since our records began in 1932 we’ve had 56 events of M4 or greater within 10km of today’s event, the largest was M5.8 (1979/10/16) and the most recent was M4.2 on 28 Aug 2012.
  • Nearby faults: Imperial fault (4.7 km), Brawley seismic zone (Brawley fault zone) (9.1 km), San Jacinto fault zone, Superstition Hills section (Superstition Hills flt) (11.3 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI.
  • Visit our special reports page for further information on local notable earthquakes.
  • ]]>
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