Unusual surface deformation during the 2019 Ridgecrest earthquake

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Unusual surface movement revealed in 2019 Ridgecrest earthquake
Location of the 2019 Ridgecrest earthquake, in the San Andreas Fault area of California. Map by Scripps Institution of Oceanography. via SOEST

A new science paper reveals unusual surface deformation during the 2019 Ridgecrest earthquake that hit near the San Andreas Fault, California.

Through their analyses, the scientists discovered hundreds of previously unmapped fractures surrounding the 2019 Ridgecrest earthquake sequence.

While most deformation associated with an earthquake is in the same direction as the fault rupture, the geoscientists found areas of deformation that moved in the opposite direction.

Their model analysis showed that these regions moved in this direction because of inelastic deformation, which helped to accommodate the overall fault rupture for the sequence.

In other words, these retrograde fractures did not actually slip in the wrong direction, but the low strength material in the damaged fault zone, which has now seen three major earthquakes, deformed in response to the stress change from the new earthquakes.

Meanwhile, further work is needed to determine the age of these young faults, and whether they slip deep into Earth’s crust or only near the surface.

More earthquake news on Science, SOEST, Strange Sounds and Steve Quayle.

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2 COMMENTS

  1. Earth Unsual shaking also Cascadia is in red Alert and West Coast of USA?
    Thursday November 12 2020, 08:07:30 UTC 12km NNE of Cabazon, CA 1.1 13.5 USGS Feed Detail
    Thursday November 12 2020, 08:05:23 UTC 22km NNW of Borrego Springs, CA 1.3 2.4 USGS Feed Detail
    Thursday November 12 2020, 07:46:54 UTC 4 km ESE of La Parguera, Puerto Rico 2.3 7.0 USGS Feed Detail
    Thursday November 12 2020, 07:32:20 UTC 6km NNW of Belden, CA 1.9 1.1 USGS Feed Detail
    Thursday November 12 2020, 07:28:23 UTC 24 km S of Mina, Nevada 2.9 8.3 USGS Feed Detail
    Thursday November 12 2020, 07:27:53 UTC 18 km NNE of Pāhala, Hawaii 2.2 -0.2 USGS Feed Detail
    Thursday November 12 2020, 07:27:52 UTC 15 km W of Volcano, Hawaii 2.1 1.4 USGS Feed Detail
    Thursday November 12 2020, 07:18:28 UTC Philippine Islands region 5.3 67.8 USGS Feed Detail
    Thursday November 12 2020, 06:58:59 UTC 31 km N of Dyer, Nevada 0.4 20.4 USGS Feed Detail
    Thursday November 12 2020, 06:37:54 UTC 31 km SE of Mina, Nevada 1.6 10.9 USGS Feed Detail
    Thursday November 12 2020, 06:28:01 UTC 8km NW of The Geysers, CA 1.1 1.8 USGS Feed Detail
    Thursday November 12 2020, 06:04:24 UTC 8km NW of The Geysers, CA 0.6 1.7 USGS Feed Detail
    Thursday November 12 2020, 06:03:16 UTC 16km SE of Livermore, CA 1.2 4.3 USGS Feed Detail
    Thursday November 12 2020, 05:54:29 UTC 2km E of The Geysers, CA 0.9 1.4 USGS Feed Detail
    Thursday November 12 2020, 05:54:29 UTC 2km E of The Geysers, CA 0.9 1.4 USGS Feed Detail
    Thursday November 12 2020, 05:41:15 UTC 14km N of Borrego Springs, CA 0.8 3.5 USGS Feed Detail
    Thursday November 12 2020, 05:41:15 UTC 14km N of Borrego Springs, CA 0.8 3.5 USGS Feed Detail
    Thursday November 12 2020, 05:40:00 UTC 63 km N of Petersville, Alaska 1.8 106.7 USGS Feed Detail
    Thursday November 12 2020, 05:33:37 UTC 21km ESE of Little Lake, CA 0.9 4.5 USGS Feed Detail
    Thursday November 12 2020, 05:17:23 UTC 2km NNE of The Geysers, CA 1.6 -0.6 USGS Feed Detail
    Thursday November 12 2020, 05:10:14 UTC 4 km WSW of Guánica, Puerto Rico 2.5 9.0 USGS Feed Detail
    Thursday November 12 2020, 05:05:23 UTC 15km WSW of Toms Place, CA 1.8 5.3 USGS Feed Detail
    Thursday November 12 2020, 05:02:16 UTC 52 km E of Denali National Park, Alaska 1.9 0.0 USGS Feed Detail
    Thursday November 12 2020, 04:53:54 UTC 65 km SW of Denali National Park, Alaska 1.6 18.8 USGS Feed Detail
    Thursday November 12 2020, 04:50:40 UTC 7km NW of The Geysers, CA 0.6 2.6 USGS Feed Detail
    Thursday November 12 2020, 04:44:04 UTC 8km NW of The Geysers, CA 1.7 1.6 USGS Feed Detail
    Thursday November 12 2020, 04:32:21 UTC 50 km S of Denali National Park, Alaska 2.1 0.0 USGS Feed Detail
    Thursday November 12 2020, 04:29:03 UTC 34 km SSW of Rachel, Nevada 1.1 0.0 USGS Feed Detail
    Thursday November 12 2020, 04:23:33 UTC 14 km SSW of Susitna, Alaska 1.7 51.6 USGS Feed Detail
    Thursday November 12 2020, 04:11:22 UTC 54 km WSW of Tatitlek, Alaska 2.4 16.0 USGS Feed Detail
    Thursday November 12 2020, 04:04:29 UTC 6km W of Cobb, CA 0.8 2.8 USGS Feed Detail
    Thursday November 12 2020, 04:03:07 UTC 10km NW of The Geysers, CA 0.6 1.0 USGS Feed Detail
    Thursday November 12 2020, 03:52:20 UTC 3 km ESE of Big Lake, Alaska 1.8 35.9 USGS Feed Detail
    Thursday November 12 2020, 03:48:39 UTC 83 km SSW of Dompu, Indonesia 4.8 69.5 USGS Feed Detail
    Thursday November 12 2020, 03:42:29 UTC 11km ENE of Mammoth Lakes, CA 1.1 1.7 USGS Feed Detail
    Thursday November 12 2020, 03:42:13 UTC 44 km NNE of Chickaloon, Alaska 1.6 41.3 USGS Feed Detail
    Thursday November 12 2020, 03:41:18 UTC 28 km S of Mina, Nevada 1.0 1.6 USGS Feed Detail
    Thursday November 12 2020, 03:38:34 UTC 28 km S of Mina, Nevada 0.8 0.1 USGS Feed Detail
    Thursday November 12 2020, 03:21:46 UTC 16 km ESE of Champerico, Guatemala 4.8 67.7 USGS Feed Detail
    Thursday November 12 2020, 03:20:03 UTC 14km NE of Ridgecrest, CA 0.8 11.2 USGS Feed Detail
    Thursday November 12 2020, 03:20:00 UTC 42 km SSW of Jurm, Afghanistan 4.2 212.9 USGS Feed Detail
    Thursday November 12 2020, 03:18:30 UTC 2km SE of The Geysers, CA 0.6 2.2 USGS Feed Detail
    Thursday November 12 2020, 03:08:28 UTC 38 km NE of Paxson, Alaska 1.6 7.7 USGS Feed Detail
    Thursday November 12 2020, 03:06:26 UTC 3km WNW of Cobb, CA 0.4 0.8 USGS Feed Detail
    Thursday November 12 2020, 03:00:43 UTC 33 km SE of Mina, Nevada 1.0 6.2 USGS Feed Detail
    Thursday November 12 2020, 02:56:18 UTC 20km ESE of Little Lake, CA 1.0 5.8 USGS Feed Detail
    Thursday November 12 2020, 02:43:35 UTC 11 km SSE of Volcano, Hawaii 2.0 5.3 USGS Feed Detail
    Thursday November 12 2020, 02:43:25 UTC 31 km SE of Mina, Nevada 1.4 13.0 USGS Feed Detail
    Thursday November 12 2020, 02:40:54 UTC 9km WNW of The Geysers, CA 0.7 2.1 USGS Feed Detail
    Thursday November 12 2020, 02:12:18 UTC 5km WSW of San Francisco Zoo, CA 1.5 7.7 USGS Feed Detail
    Thursday November 12 2020, 02:05:21 UTC 5 km SSW of Volcano, Hawaii 3.0 1.7 USGS Feed Detail
    Thursday November 12 2020, 01:44:58 UTC 6km NE of Banning, CA 1.2 18.0 USGS Feed Detail
    Thursday November 12 2020, 01:37:06 UTC 21 km WSW of Susitna North, Alaska 1.9 8.3 USGS Feed Detail
    Thursday November 12 2020, 01:19:09 UTC 13km SSW of Searles Valley, CA 1.2 8.7 USGS Feed Detail
    Thursday November 12 2020, 01:19:09 UTC 13km SSW of Searles Valley, CA 1.0 7.5 USGS Feed Detail
    Thursday November 12 2020, 01:18:36 UTC 171 km NE of Laikit, Laikit II (Dimembe), Indonesia 4.6 81.8 USGS Feed Detail
    Thursday November 12 2020, 01:13:48 UTC 0km NE of The Geysers, CA 1.2 1.1 USGS Feed Detail
    Thursday November 12 2020, 01:09:23 UTC 31 km SW of Chenega, Alaska 2.7 13.1 USGS Feed Detail
    Thursday November 12 2020, 00:59:30 UTC 6km W of Cobb, CA 0.8 3.0 USGS Feed Detail
    Thursday November 12 2020, 00:58:35 UTC 12 km E of Pāhala, Hawaii 2.2 33.1 USGS Feed Detail
    Thursday November 12 2020, 00:40:13 UTC 10km E of Mammoth Lakes, CA 0.2 0.4 USGS Feed Detail
    Thursday November 12 2020, 00:27:30 UTC 11km ESE of Willits, CA 2.0 5.7 USGS Feed Detail
    Thursday November 12 2020, 00:22:07 UTC 7km W of Cobb, CA 0.6 1.2 USGS Feed Detail
    Thursday November 12 2020, 00:04:39 UTC 6km N of Lake Elsinore, CA 1.2 -0.5 USGS Feed Detail
    Thursday November 12 2020, 00:04:33 UTC 40 km SE of Mina, Nevada 1.4 8.7 USGS Feed Detail
    Wednesday November 11 2020, 23:55:48 UTC 10 km E of Salamatof, Alaska 1.9 40.7 USGS Feed Detail
    Wednesday November 11 2020, 23:50:12 UTC 39 km ESE of Mina, Nevada 1.2 1.4 USGS Feed Detail
    Wednesday November 11 2020, 23:48:05 UTC 15 km E of Puente Alto, Chile 3.2 10.0 USGS Feed Detail
    Wednesday November 11 2020, 23:24:59 UTC 8 km SSE of Maria Antonia, Puerto Rico 2.7 14.0 USGS Feed Detail
    Wednesday November 11 2020, 23:09:55 UTC 21 km W of Cooper Landing, Alaska 1.9 40.3 USGS Feed Detail
    Wednesday November 11 2020, 23:03:30 UTC 16km ESE of McCloud, CA 2.3 9.5 USGS Feed Detail
    Wednesday November 11 2020, 22:57:07 UTC 11 km NNW of Cantwell, Alaska 1.8 7.3 USGS Feed Detail
    Wednesday November 11 2020, 22:55:52 UTC 28 km S of Mina, Nevada 1.7 3.6 USGS Feed Detail
    Wednesday November 11 2020, 22:54:28 UTC 22 km E of Kimbe, Papua New Guinea 4.8 122.1 USGS Feed Detail
    Wednesday November 11 2020, 22:54:28 UTC 22 km E of Kimbe, Papua New Guinea 4.8 122.1 USGS Feed Detail
    Wednesday November 11 2020, 22:27:46 UTC 8 km NW of Blue Diamond, Nevada 2.2 2.2 USGS Feed Detail
    Wednesday November 11 2020, 22:21:43 UTC 4km WNW of The Geysers, CA 0.3 3.3 USGS Feed Detail
    Wednesday November 11 2020, 22:21:43 UTC 4km WNW of The Geysers, CA 0.3 3.3 USGS Feed Detail
    Wednesday November 11 2020, 22:18:57 UTC 12km NE of Bella Vista, CA 1.6 3.4 USGS Feed Detail
    Wednesday November 11 2020, 22:05:23 UTC 24 km S of Blowing Point Village, Anguilla 3.3 86.0 USGS Feed Detail
    Wednesday November 11 2020, 22:04:19 UTC 10 km E of Pāhala, Hawaii 1.9 29.1 USGS Feed Detail
    Wednesday November 11 2020, 22:02:54 UTC 7 km N of Schurz, Nevada 2.7 15.4 USGS Feed Detail
    Wednesday November 11 2020, 21:49:40 UTC 26km SSW of Ocotillo Wells, CA 1.3 8.1 USGS Feed Detail
    Wednesday November 11 2020, 21:49:40 UTC 26km SSW of Ocotillo Wells, CA 1.0 8.2 USGS Feed Detail
    Wednesday November 11 2020, 21:39:59 UTC 5 km SW of Tallaboa, Puerto Rico 3.1 10.0 USGS Feed Detail
    Wednesday November 11 2020, 21:39:27 UTC 4 km SE of Union City, Oklahoma 0.8 7.0 USGS Feed Detail
    Wednesday November 11 2020, 21:35:37 UTC 109 km ESE of Hengchun, Taiwan 4.8 10.0 USGS Feed Detail
    Wednesday November 11 2020, 21:33:27 UTC 125 km ESE of Hengchun, Taiwan 5.0 10.0 USGS Feed Detail
    Wednesday November 11 2020, 21:33:02 UTC 37 km ESE of Mina, Nevada 1.0 11.4 USGS Feed Detail
    Wednesday November 11 2020, 21:31:03 UTC 22km E of Alum Rock, CA 1.4 15.4 USGS Feed Detail
    Wednesday November 11 2020, 21:26:35 UTC 39 km ESE of Mina, Nevada 1.2 12.2 USGS Feed Detail
    Wednesday November 11 2020, 21:21:53 UTC 15 km NW of Four Mile Road, Alaska 1.3 52.3 USGS Feed Detail
    Wednesday November 11 2020, 20:48:32 UTC 5km S of San Juan Bautista, CA 3.0 6.4 USGS Feed Detail
    Wednesday November 11 2020, 20:40:49 UTC 8 km NNW of Susitna, Alaska 2.0 4.5 USGS Feed Detail
    Wednesday November 11 2020, 20:36:12 UTC 23 km W of Coquimbo, Chile 4.1 37.0 USGS Feed Detail
    Wednesday November 11 2020, 20:28:05 UTC 10 km SSE of Guánica, Puerto Rico 2.9 13.0 USGS Feed Detail
    Wednesday November 11 2020, 20:26:59 UTC 5km S of San Juan Bautista, CA 3.4 6.5 USGS Feed Detail
    Wednesday November 11 2020, 20:25:15 UTC 39 km ESE of Mina, Nevada 1.1 9.8 USGS Feed Detail
    Wednesday November 11 2020, 20:04:15 UTC 7km NW of The Geysers, CA 0.6 13.6 USGS Feed Detail
    Wednesday November 11 2020, 19:57:55 UTC 3 km SW of Kapowsin, Washington 2.3 -0.7 USGS Feed

  2. You can hike around and see weird deformations in Cali. I remember Geology class we went around and did a field class, took pictures, and then next class the slide carousel came out, and we were to identify differnt types of faults. It was a good class. I liked the professor. I took another class from him.

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