SCSNJohannesburg – SCSN https://www.scsn.org/index.html Southern California Seismic Network Mon, 19 May 2025 19:35:22 +0000 en-US hourly 1 https://wordpress.org/?v=5.1.12 01/13/2016, M3.6 near Johannesburg ../../../../index.php/2016/01/14/01132016-m3-8-event-near-johannesburg/index.html ../../../../index.php/2016/01/14/01132016-m3-8-event-near-johannesburg/#respond Thu, 14 Jan 2016 15:24:15 +0000 http://www.scsn.org/?p=1384 …
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  • 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.
    • ]]>     ../../../../index.php/2016/01/14/01132016-m3-8-event-near-johannesburg/feed/ 0     12/27/2015, M4.3 near Johannesburg ../../../../index.php/2015/12/27/12272015-m4-3-event-near-johannesburg/index.html ../../../../index.php/2015/12/27/12272015-m4-3-event-near-johannesburg/#respond Sun, 27 Dec 2015 19:02:17 +0000 http://www.scsn.org/?p=1291 …
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  • 27 Dec 2015 10:31:17 PST, (35.215, -117.280), depth 0.7km, 37km ESE of Johannesburg, California
  • Aftershocks: so far (04 Jan 2016) there have been 9 aftershocks recorded, the largest M2.3. 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 5 events during the 3 days prior to the earthquake (within a 1 km radius), the largest was M3.8 (2015/12/26). See the earlier post for details.
  • Historical seismicity: since our records began in 1932 we’ve had 3 events of M4 or greater within 10km of today’s event, the largest was M4.7 (1992/06/29) and the most recent was M4.1 on 30 Jun 1992.
  • Nearby faults: Blackwater fault zone (Blackwater fault) (4.7 km), Harper fault zone (Black Mountain fault) (5.1 km), Harper fault zone (Gravel Hills fault) (6.8 km), Harper fault zone (Harper Valley fault) (8.5 km), Blackwater fault zone (9.1 km) and Harper fault zone (Cuddeback fault) (10.9 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI.
  • Visit our special reports page for further information on local notable earthquakes.
    • ]]>     ../../../../index.php/2015/12/27/12272015-m4-3-event-near-johannesburg/feed/ 0     12/26/2015, M3.7 and M3.8 near Johannesburg ../../../../index.php/2015/12/26/12262015-m3-7-event-near-johannesburg/index.html ../../../../index.php/2015/12/26/12262015-m3-7-event-near-johannesburg/#respond Sat, 26 Dec 2015 09:07:40 +0000 http://www.scsn.org/?p=1287 …
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  • Two events:
    • M3.7, 26 Dec 2015 00:04:30 PST, (35.212, -117.282), depth 0.9km, 37km ESE of Johannesburg, California
    • M3.8, 26 Dec 2015 03:55:16 PST, (35.212, -117.278), depth 0.3km, 37km ESE of Johannesburg, California
  • So far (26 Dec 2015) 1 smaller event (M1.4) has also been recorded. More may be expected in the next few days, the largest aftershock 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 3 events of M4 or greater within 10km of today’s event, the largest was M4.7 (1992/06/29) and the most recent was M4.1 on 30 Jun 1992.
  • Nearby faults: Harper fault zone (Black Mountain fault) (4.7 km), Blackwater fault zone (Blackwater fault) (5.1 km), Harper fault zone (Gravel Hills fault) (6.4 km), Harper fault zone (Harper Valley fault) (8.1 km), Blackwater fault zone (9.1 km) and Harper fault zone (Cuddeback fault) (10.8 km).
  • Links:
  • Visit our special reports page for further information on local notable earthquakes.
    • ]]>     ../../../../index.php/2015/12/26/12262015-m3-7-event-near-johannesburg/feed/ 0