SCSNUncategorized – SCSN https://www.scsn.org/index.html Southern California Seismic Network Sun, 27 Apr 2025 14:54:32 +0000 en-US hourly 1 https://wordpress.org/?v=5.1.12 06/23/2021, M3.6 near Yucca Valley ../../../../index.php/2021/06/23/06-23-2021-m3-6-near-yucca-valley/index.html ../../../../index.php/2021/06/23/06-23-2021-m3-6-near-yucca-valley/#respond Wed, 23 Jun 2021 21:09:44 +0000 http://www.scsn.org/?p=4077 …
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]]> Event

  • 23 Jun 2021 13:06:07 PDT, (34.147, -116.445), depth 5.5km.
  • 4km NNW of Yucca Valley, California

Aftershocks

  • As of 23 Jun 2021, 02:05PM PDT, there have been 2 aftershocks recorded.
  • The largest was M1.9 (smallest M1.4).
  • More aftershocks 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.

Possible Foreshocks

  • There were 2 events during the 3 days prior to the earthquake (within a 10 km radius).
  • The largest was M1.1 (2021/06/23).

Historical Seismicity

  • Since our records began in 1932 we’ve had 97 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M7.3 on 1992/06/28.
  • The most recent historic event was M4.0 on 06 Aug 2010.

Faults

  • CFM fault associations: most likely Pinto Mountain fault (38%). Alternates: Other CFM faults (62%).*
  • Nearby faults: Pinto Mountain fault zone (Pinto Mountain fault) (1.9 km), Johnson Valley fault, southern Johnson Valley section (Johnson Valley fault) (2.0 km), Pinto Mountan fault zone (3.8 km), Burnt Mountain fault zone (Burnt Mountain fault) (4.4 km), Eureka Peak fault (5.1 km), Pinto Mountain fault zone (Morongo Valley fault) (7.2 km), Johnson Valley fault, southern Johnson Valley section (9.3 km), Pipes Canyon fault (10.6 km) and Burnt Mountain fault zone (East Wide Canyon fault) (13.6 km).**

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2021/06/23/06-23-2021-m3-6-near-yucca-valley/feed/ 0 10/18/2019, M3.5 near Compton ../../../../index.php/2019/10/18/10-18-2019-m3-5-near-compton/index.html ../../../../index.php/2019/10/18/10-18-2019-m3-5-near-compton/#respond Fri, 18 Oct 2019 16:27:35 +0000 http://www.scsn.org/?p=3633 …
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]]> Event

  • 18 Oct 2019 00:19:51 PDT, (33.892, -118.218), depth 23.6km.
  • 0km SSE of Compton, California

Aftershocks

  • As of 18 Oct 2019, 09:05AM PDT, there have been 2 aftershocks recorded.
  • The largest was M1.6 (smallest M1.4).
  • More aftershocks 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 29 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M5.1 on 1941/11/14.
  • The most recent historic event was M4.4 on 16 Mar 2010.

Faults

  • CFM fault associations: most likely Not associated with a CFM modeled fault (88%). Alternates: Newport; Inglewood fault segment (11%), Other CFM faults (1%).*
  • Nearby faults: Newport-Inglewood-Rose Canyon fault zone, north Los Angeles basin section (3.2 km), Newport-Inglewood-Rose Canyon fault zone, South Los Angeles basin section (7.0 km) and Palos Verdes fault zone, Palos Verdes Hills section (Palos Verdes Hills fault) (14.1 km).**

Additional Information


Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed. The closest station recorded in our Live Seismograms feed to the epicenter is CI.RPV at 23km away.


*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

]]> ../../../../index.php/2019/10/18/10-18-2019-m3-5-near-compton/feed/ 0 06/12/2019, M3.7 near Camarillo ../../../../index.php/2019/06/13/06-12-2019-m3-7-near-camarillo/index.html ../../../../index.php/2019/06/13/06-12-2019-m3-7-near-camarillo/#respond Thu, 13 Jun 2019 01:02:49 +0000 http://www.scsn.org/?p=3422 …
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]]> Event

  • 12 Jun 2019 17:07:33 PDT, (34.073, -119.040), depth 18.5km.
  • 16km S of Camarillo, California

Aftershocks

  • As of 12 Jun 2019, 05:59PM PDT, there have been no aftershocks recorded.
  • Aftershocks 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 7 events of M4 or greater within 10km of today’s event.
  • The largest historic event was M5.3 on 1973/02/21.
  • The most recent historic event was M4.4 on 02 May 2009.

Faults

  • CFM fault associations: most likely Anacapa; Dume fault segment (40%). Alternates: Not associated with a CFM modeled fault (24%), Other CFM faults (36%).*
  • Nearby faults: Sycamore Canyon fault (2.6 km), Malibu Coast fault zone (Malibu Coast fault) (2.7 km), Boney Mountain fault (4.7 km) and Anacapa-Dume fault (8.3 km).**

Additional Information




*Earthquakes can occur both near or on major known faults, and in places where no clear fault zones are known. Using the statistical method of Evans et al. (in prep. 2019) the location and focal mechanism of this earthquake suggest the above association with modeled faults in the Community Fault Model (CFM) provided by the Southern California Earthquake Center (SCEC) and Harvard University. Note that the CFM fault association may be different from the nearby faults list. Differences may arise due to different fault databases, and because the CFM fault association uses the hypocenter with relation to subsurface 3-dimensional fault orientation models, while the nearby faults list utilizes mapped surface traces as they relate to the epicenter.

CFM Fault: SCEC CFM 5.0 Fault name and closest segment if available; The CFM is maintained by Harvard University, Dept of Earth & Planetary Sciences.

Probability: The probability in percent the earthquake is associated with this fault.

SCSN: Caltech/USGS Southern California Seismic Network

**U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed 2015, from USGS web site: https://earthquake.usgs.gov/hazards/qfaults/

This information is subject to change as more up-to-date data become available.

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