SCSNM3.5 – 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 11/09/2017, M3.5 near Anza ../../../../index.php/2017/11/10/11092017-m3-5-near-anza/ ../../../../index.php/2017/11/10/11092017-m3-5-near-anza/#respond Fri, 10 Nov 2017 01:56:08 +0000 http://scsn-dev.gps.caltech.edu/?p=2516 ]]>
  • 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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    07/27/2017, M3.5 near Kernville ../../../../index.php/2017/08/03/07272017-m3-5-event-near-kernville/ ../../../../index.php/2017/08/03/07272017-m3-5-event-near-kernville/#respond Thu, 03 Aug 2017 16:12:03 +0000 http://scsn-dev.gps.caltech.edu/?p=2240 ]]>
  • 27 Jul 2017 17:48:48 PDT, (35.623, -118.150), depth 9.1km, 29km ESE of Kernville, California
  • Aftershocks: so far there have been no aftershocks recorded. Some 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 5 events of M4 or greater within 10km of today’s event, the largest was M5.0 (1946/03/15) and the most recent was M4.5 on 28 May 1955.
  • Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
  • Visit our special reports page for further information on local notable earthquakes.
  • Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.
    The closest station represented in the feed below is CI.BAK, 91.8km away from epicenter.

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    06/25/2017, M3.5 near Banning ../../../../index.php/2017/06/26/06252017-m3-5-event-near-banning/ ../../../../index.php/2017/06/26/06252017-m3-5-event-near-banning/#respond Mon, 26 Jun 2017 15:38:05 +0000 http://scsn-dev.gps.caltech.edu/?p=2219 ]]>
  • 25 Jun 2017 06:53:24 PDT, (34.002, -116.903), depth 13.9km, 9km NNW of Banning, California
  • Aftershocks: so far (26 Jun 2017, 08:23AM PDT) there has been 1 aftershock recorded, M1.1. 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.
  • There were 2 events during the 3 days prior to the earthquake (within a 15 km radius), the largest was M1.6 (2017/06/25).
  • Historical seismicity: since our records began in 1932 we’ve had 19 events of M4 or greater within 10km of today’s event, the largest was M5.0 (1965/10/17) and the most recent was M4.4 on 06 Jan 2016.
  • Nearby faults: San Andreas fault zone: San Bernardino Mountains section (Gandy Ranch fault) (0.6 km), San Bernardino Mountains section (South Branch SAF) (2.3 km), San Bernardino Mountains section (Mission Creek fault) (3.2 km), San Bernardino Mountains section (Banning fault) (3.5 km), San Bernardino Mountains section (4.9 km), San Bernardino Mountains section (Banning fault B) (7.5 km), San Bernardino Mountains section (Mill Creek fault) (8.7 km); San Gorgonio Pass fault zone (San Gorgonio Pass fault) (5.2 km), San Gorgonio Pass fault zone (Cherry Valley fault) (8.4 km); Beaumont Plain fault zone (8.5 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
  • Visit our special reports page for further information on local notable earthquakes.
  • Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.The closest associated stations are CI.DGR 40km away
    and CI.RVR 43km away

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    03/01/2017, M3.5 near Salton City ../../../../index.php/2017/03/01/03012017-m3-5-event-near-salton-city/ ../../../../index.php/2017/03/01/03012017-m3-5-event-near-salton-city/#respond Wed, 01 Mar 2017 20:43:34 +0000 http://scsn-dev.gps.caltech.edu/?p=2063 ]]>
  • 01 Mar 2017 12:18:39 PST, (33.135, -115.862), depth 11.5km, 20km SSE of Salton City, California
  • Aftershocks: so far (01 Mar 2017, 12:38PM PST) there has been 1 aftershock recorded, 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.
  • 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 was M6.6 (1987/11/24) and the most recent was M4.1 on 19 Jul 1991.
  • Nearby faults: San Jacinto fault zone, Superstition Hills section (Kane Spring fault) (3.4 km), San Jacinto fault zone, Superstition Hills section (5.1 km)
  • Links for: USGS earthquake page, ShakeMap, DYFI.
  • Visit our special reports page for further information on local notable earthquakes.
  • Below is the waveform data associated with this event as recorded in our Live Seismograms Feed

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    10/31/2016, M3.5 near Niland ../../../../index.php/2016/10/31/10312016-m3-5-event-near-niland/ ../../../../index.php/2016/10/31/10312016-m3-5-event-near-niland/#respond Mon, 31 Oct 2016 16:48:02 +0000 http://scsn-dev.gps.caltech.edu/?p=1799 ]]>
  • 31 Oct 2016 03:41:07 PDT, (33.187, -115.567), depth 3.1km, 7km SW of Niland, California
  • This event is the largest so far in a small cluster of events that started at about 2:30am PDT, consisting of about 35 recorded events. A few events were also recorded in the same area on 26 Oct 2016. A smaller cluster of events also occurred on the 26 Oct 2016 about 3km to the west of the most recent seismicity, giving a total of approximately 50 events over the last 6 days. We have recorded 4 events over M3 and more than 20 events over M2.
  • Current cumulative event rate and magnitudes for the small swarm near Niland.

    NilandSwarmOct2016_rate

  • The events are in the southern section of the Brawley Seismic Zone, a relatively active area for seismicity. Swarms occur relatively frequently, notably the swarms that occurred during the 1970’s and 1980’s in this area made the zone among the most active areas in all of California.
  • Historical seismicity: since our records began in 1932 we’ve had 11 events of M4 or greater within 10km of today’s event, the largest was M5.1 (2005/09/02) and the most recent was M4.2 on 24 Dec 2014.
  • Relocated events for the small swarm near Niland, forming a very tight cluster. Figure provided by Egill Hauksson, Caltech.

    Niland_eqs_31-Oct-2016

    Catalogue events in the current small swarm near Niland coloured by time (blue early, red late) and sized by magnitude. Historic seismicity above M4.5 is marked by a grey star and the event’s magnitude.

    NilandSwarmOct2016_map

  • The following information comes from our special report on the 2005 Obsidian Butte swarm
    • The Brawley Seismic Zone is a north-striking zone of northwest and northeast-striking faults that extends from the southern end of the San Andreas fault to the northern end of the Imperial fault. It is often considered a remnant spreading center in the transition from the Gulf of California mid-ocean ridge to the San Andreas transform fault. Historically, activity includes both northeast-oriented cross-faults that typically involve left-lateral faulting, and activity on northerly to northwesterly-oriented strands (right-lateral faulting) of the zone. The largest events to have occurred on the cross-faults were the Elmore Ranch event in 1987, which is considered to have triggered the Superstition Hills event less than 12 hours later, and the Westmorland event in 1981. The Brawley Seismic Zone is proximal to the southern San Andreas fault, the San Jacinto fault zone, and the Imperial fault.
    • The pattern of Brawley swarms of the 1970’s was a large number of very small earthquakes (sometimes exceeding 10,000 events) with up to a dozen moderate events of magnitude 4 or so, but no clear mainshock larger than the other events. The 1970’s swarms would be highly active for a few days and then taper off over the next week or two.
  • Links for: USGS earthquake page, ShakeMap, DYFI.
  • Visit our special reports page for further information on local notable earthquakes.
  • ]]>
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    01/16/2016, M3.5 near Lone Pine ../../../../index.php/2016/01/19/01162016-m3-5-event-near-lone-pine/ ../../../../index.php/2016/01/19/01162016-m3-5-event-near-lone-pine/#respond Tue, 19 Jan 2016 16:44:28 +0000 http://www.scsn.org/?p=1393 ]]>
  • 16 Jan 2016 12:49:18 PST, (36.542, -117.968), depth 11.2km, 10km ESE of Lone Pine, California
  • Aftershocks: so far (19 Jan 2016, 08:41AM PST) there has been 1 aftershock recorded, M1.8. 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.
  • Nearby faults: Owens Valley fault zone, 1872 rupture section (Owens Valley fault) (5.7 km), Southern Sierra Nevada fault zone, Haiwee Reservoir section (10.2 km), Owens Valley fault zone, 1872 rupture section (Lone Pine fault) (11.2 km) and Southern Sierra Nevada fault zone, Independence section (Independence fault) (12.3 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI.
  • Visit our special reports page for further information on local notable earthquakes.
  • ]]>
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