SCSNby Zackary Newman – SCSN http://www.scsn.org Southern California Seismic Network Wed, 05 Dec 2018 22:51:26 +0000 en-US hourly 1 https://wordpress.org/?v=4.9.2 11/29/2018, M3.9 near Ocotillo Wells ../../../../index.php/2018/11/29/11-29-2018-m3-9-near-ocotillo-wells/ ../../../../index.php/2018/11/29/11-29-2018-m3-9-near-ocotillo-wells/#respond Thu, 29 Nov 2018 14:32:02 +0000 http://www.scsn.org/?p=3039 ]]>
  • 29 Nov 2018 05:48:53 PST, (33.015, -115.983), depth 11.4km, 20km SE of Ocotillo Wells, 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 59 events of M4 or greater within 10km of today’s event, the largest was M6.6 (1987/11/24) and the most recent was M4.6 on 04 Nov 2010.
  • 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.

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    11/19/2018, M4.8 near Alberto Oviedo Mota ../../../../index.php/2018/11/20/11-19-2018-m4-8-near-alberto-oviedo-mota/ ../../../../index.php/2018/11/20/11-19-2018-m4-8-near-alberto-oviedo-mota/#respond Tue, 20 Nov 2018 16:31:13 +0000 http://www.scsn.org/?p=3037 ]]>
  • 19 Nov 2018 12:18:42 PST, (32.207, -115.253), depth 10.9km, 8km WSW of Alberto Oviedo Mota, B.C., Mexico
  • Aftershocks: so far (20 Nov 2018, 08:29AM PST) there have been 11 aftershocks recorded, the largest M3.5 (smallest M2.2). 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 124 events of M4 or greater within 10km of today’s event, the largest was M7.2 (2010/04/04) and the most recent was M4.4 on 29 Sep 2018.
  • Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
  • Visit our special reports page for further information on local notable earthquakes.
  • ]]>
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    11/09/2018, M3.8 near Aguanga ../../../../index.php/2018/11/09/11-09-2018-m3-8-near-aguanga/ ../../../../index.php/2018/11/09/11-09-2018-m3-8-near-aguanga/#respond Fri, 09 Nov 2018 15:25:56 +0000 http://www.scsn.org/?p=3032 ]]>
  • Two events above M3.5 have occurred in the ongoing Cahuilla swarm:
    • 09 Nov 2018 06:45:50 PST, (33.483, -116.802), depth 2.0km, 7km NE of Aguanga, California
    • 09 Nov 2018 06:58:09 PST, (33.485, -116.803), depth 1.1km, 7km NE of Aguanga, California
  • Aftershocks: so far (09 Nov 2018, 02:04PM PST) there have been 87 aftershocks recorded since the second, larger event, the largest M2.0 (smallest M0.1). 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 91 events during the 3 days prior to the earthquake (within a 10 km radius), the largest was the M3.7 (2018/11/09).
  • Historical seismicity: since our records began in 1932 we’ve had 14 events of M4 or greater within 10km of today’s event, the largest was M5.6 (2005/06/12) and the most recent was M4.4 on 15 Aug 2018. Since the onset of the Cahuilla swarm in 2016, we have now recorded over 9000 events.
  • Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
  • Visit our special reports page for further information on local notable earthquakes.
  • ]]>
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    10/24/2018, M3.6 near Lone Pine ../../../../index.php/2018/10/25/10-24-2018-m3-6-near-lone-pine/ ../../../../index.php/2018/10/25/10-24-2018-m3-6-near-lone-pine/#respond Thu, 25 Oct 2018 14:37:02 +0000 http://www.scsn.org/?p=2927 ]]>
  • 24 Oct 2018 14:28:02 PDT, (36.602, -117.980), depth 10.6km, 8km ENE of Lone Pine, 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 2 events of M4 or greater within 10km of today’s event, the largest was M4.4 (1988/07/05) and the most recent was M4.4 on 05 Jul 1988.
  • 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.

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    09/30/2018, M3.6 near Calimesa ../../../../index.php/2018/10/01/09-30-2018-m3-6-near-calimesa/ ../../../../index.php/2018/10/01/09-30-2018-m3-6-near-calimesa/#respond Mon, 01 Oct 2018 15:15:07 +0000 http://www.scsn.org/?p=2906 ]]>
  • 30 Sep 2018 07:41:29 PDT, (34.002, -117.018), depth 16.3km, 4km ENE of Calimesa, California
  • Aftershocks: so far (01 Oct 2018, 08:10AM PDT) there have been 5 aftershocks recorded, the largest M1.4 (smallest M0.7). 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 10 km radius), the largest was M1.0 (2018/09/28).
  • Historical seismicity: since our records began in 1932 we’ve had 21 events of M4 or greater within 10km of today’s event, the largest was M4.9 (2005/06/16) and the most recent was M4.4 on 06 Jan 2016.
  • Nearby faults: San Gorgonio Pass fault zone (San Gorgonio Pass fault) (1.3 km), San Andreas fault zone, San Bernardino Mountains section (Banning fault) (3.5 km), Beaumont Plain fault zone (4.4 km), Crafton Hills fault zone (Chicken Hill fault) (5.2 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.

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    09/28/2018, M4.4 near Delta, Baja California ../../../../index.php/2018/10/01/09-28-2018-m4-4-near-delta/ ../../../../index.php/2018/10/01/09-28-2018-m4-4-near-delta/#respond Mon, 01 Oct 2018 15:08:41 +0000 http://www.scsn.org/?p=2903 ]]>
  • 28 Sep 2018 19:17:46 PDT, (32.348, -115.183), depth 28.7km, 1km SE of Delta, B.C., Mexico
  • 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 118 events of M4 or greater within 10km of today’s event, the largest was M7.2 (2010/04/04) and the most recent was M4.0 on 08 Apr 2015.
  • 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.

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    07/25/2018, M4.2 near Ensenada ../../../../index.php/2018/07/25/07-25-2018-m4-6-near-ensenada/ ../../../../index.php/2018/07/25/07-25-2018-m4-6-near-ensenada/#respond Wed, 25 Jul 2018 20:42:56 +0000 http://www.scsn.org/?p=2835 ]]>
  • 25 Jul 2018 13:17:56 PDT, (31.950, -116.298), depth 15.8km, 32km ENE of Ensenada, B.C., Mexico
  • 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 42 events of M4 or greater within 10km of today’s event, the largest was M6.8 (1956/02/09) and the most recent was M4.1 on 09 Aug 2011.
  • 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 to the earthquake shown in the view is CI.SDG in San Diego at approximately 120km from the epicenter.

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    07/10/2018, M3.6 near Ontario ../../../../index.php/2018/07/10/07-10-2018-m3-6-near-ontario/ ../../../../index.php/2018/07/10/07-10-2018-m3-6-near-ontario/#respond Tue, 10 Jul 2018 14:30:34 +0000 http://www.scsn.org/?p=2812 ]]>
  • 10 Jul 2018 04:08:37 PDT, (34.010, -117.585), depth 4.3km, 6km SE of Ontario, California
  • Aftershocks: so far (10 Jul 2018, 07:23AM PDT) there have been 5 aftershocks recorded, the largest M2.5 (smallest M0.9). 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 17 events of M4 or greater within 10km of today’s event, the largest was M5.5 (1990/02/28) and the most recent was M4.4 on 15 Jan 2014.
  • Nearby faults: Red Hill-Etiwanda Avenue fault (10.5 km) and Elsinore fault zone, Chino section (Chino fault) (11.0 km).
  • Links for: USGS earthquake page, ShakeMap, DYFI, waveforms.
  • Below are the waveform data associated with this event, as recorded in our Live Seismograms Feed.The closest station to the earthquake shown in the view is CI.RVR in Riverside at approximately 19km from the epicenter.

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    05/30/2018, M3.8 near Thousand Palms ../../../../index.php/2018/05/30/05-30-2018-m3-8-near-thousand-palms/ ../../../../index.php/2018/05/30/05-30-2018-m3-8-near-thousand-palms/#respond Wed, 30 May 2018 19:35:31 +0000 http://www.scsn.org/?p=2783 ]]>
  • 30 May 2018 12:22:05 PDT, (33.924, -116.323), depth 9.5km, 13km NNE of Thousand Palms, California
  • Aftershocks: so far (30 May 2018, 12:33PM PDT) there have been 2 aftershocks recorded, the largest M1.2 (smallest M0.9). 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 1 events during the 3 days prior to the earthquake (within a 10 km radius), the largest was M0.6 (2018/05/30).
  • Historical seismicity: since our records began in 1932 we’ve had 88 events of M4 or greater within 10km of today’s event, the largest was M6.1 (1992/04/23) and the most recent was M4.0 on 06 Aug 2010.
  • Nearby faults: unnamed Fault in the Little San Bernardino Mountains (1.4 km), Blue Cut fault zone (Blue Cut fault) (2.2 km), Eureka Peak fault (5.0 km), San Andreas fault zone, San Bernardino Mountains section (North Branch SAF) (6.6 km), Burnt Mountain fault zone (East Wide Canyon fault) (6.8 km), San Andreas fault zone, San Bernardino Mountains section (6.8 km), Indio Hills fault zone (9.2 km), San Andreas fault zone, San Bernardino Mountains section (South Branch SAF) (9.5 km) and Long Canyon fault (10.9 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 station to the earthquake shown in the view is CI.WWC in Palm Springs at approximately 8km from the epicenter.

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    05/08/2018, M4.5 near Cabazon ../../../../index.php/2018/05/08/05-08-2018-m4-5-near-cabazon/ ../../../../index.php/2018/05/08/05-08-2018-m4-5-near-cabazon/#respond Tue, 08 May 2018 13:57:59 +0000 http://www.scsn.org/?p=2711 ]]> A M4.5 earthquake occurred at 4:49 local time this morning (May 8) under the San Bernardino Mountains, near a complex part of the San Andreas fault. Seismologists call this region the “San Gorgonio knot” because so many small faults intersect here and the main San Andreas trace is not clearly defined.

    Historically, this area around Mt. San Gorgonio is the only part of the southern San Andreas fault that produces smaller quakes. Many M3-4 earthquakes have been recorded here. The largest were the M6.0 Desert Hot Springs earthquake in 1948 about 30 miles to the east and the 1986 M5.9 North Palm Springs earthquake that was less than 10 miles east of today’s earthquake.

    The focal mechanism calculated by Caltech and the USGS for this earthquake Moment Tensor Page shows the event happened on a fault that strikes a little north of east-west and that the motion was primarily thrust faulting. This means that the north side moved up and over the lower south side of the fault. This is very similar to the motion we saw in the 1986 North Palm Springs earthquake. (https://authors.library.caltech.edu/48710/.)

    This morning’s M4.5 was felt from San Diego to Los Angeles. More than 10,000 people have reported feeling it at Did you feel it?. The strongest shaking recorded by the instruments is Intensity VI.

    This size earthquake is common in California, happening many times each year somewhere in the state. This is normal activity and has no relationship to the Hawaii eruption.

    Technical information about this earthquake and its aftershocks:

    • 08 May 2018 04:49:34 PDT, (34.017, -116.780), depth 12.9km, 11km N of Cabazon, California.
    • Aftershocks: so far (09 May 2018, 10:40AM PDT) there have been 88 aftershocks recorded, the largest M3.2 (smallest M0.2). 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.
    • Plot of seismicity through time, from 0.5 days before the M4.5 Cabazon event to approximately 1.25 days after. Top plot shows cumulative earthquake count against time. Bottom plot shows earthquake magnitude against time, the M4.5 event and M3.2 aftershock are plotted as red stars.
      Map showing the M4.5 earthquake near Cabazon (red star) with foreshocks and aftershocks in a 10km radius shown as circles colored by time (blue = early, red = late) and sized by magnitude. Grey stars labelled by magnitude show historic earthquakes. Grey lines show the mapped fault strands in the San Andreas fault zone.
    • Historical seismicity: since our records began in 1932 we’ve had 46 events of M4 or greater within 10km of today’s event, the largest was M6.0 (1986/07/08) and the most recent was M4.4 on 06 Jan 2016.
    • Nearby faults: San Andreas fault zone, San Bernardino Mountains section (3.0 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 station to the earthquake shown in the view is CI.WWC in Palm Springs at approximately 35km.

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