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Minor mag. 0.9 earthquake - 3km SW of Cobb, CA, on Tuesday, Dec 6, 2022 at 8:00 am (GMT -8) -

Minor magnitude 0.9 earthquake at 1 km depth

6 Dec 16:02 UTC: First to report: USGS after 2 minutes.

Earthquake details

Date & time	Dec 6, 2022 16:00:42 UTC -
Local time at epicenter	Tuesday, Dec 6, 2022 at 8:00 am (GMT -8)
Status	Confirmed
Magnitude	0.9
Depth	0.6 km
Epicenter latitude / longitude	38.80283°N / 122.74617°W (California, United States)
Antipode	38.803°S / 57.254°E
Shaking intensity	Not felt
Felt
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Clear Lake (19 km / 12 mi)
Nearby towns and cities	3 km (2 mi) SW of Cobb (pop: 1,780) \| Show on map \| Quakes nearby 20 km (13 mi) SSW of Clearlake (Lake County) (pop: 15,200) \| Show on map \| Quakes nearby 29 km (18 mi) NNE of Windsor (Sonoma County) (pop: 27,500) \| Show on map \| Quakes nearby 40 km (25 mi) N of Santa Rosa (pop: 175,000) \| Show on map \| Quakes nearby 64 km (40 mi) N of Petaluma (pop: 60,400) \| Show on map \| Quakes nearby 69 km (43 mi) NW of Napa (pop: 80,400) \| Show on map \| Quakes nearby 83 km (51 mi) NW of Vacaville (pop: 96,800) \| Show on map \| Quakes nearby 87 km (54 mi) NW of Fairfield (pop: 113,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Light Snow -0.4°C (31 F), humidity: 64%, wind: 2 m/s (3 kts) from ENE
Estimated seismic energy released	1.4 x 10⁶ joules (0.392 kilowatt hours) \| about seismic energy

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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.

Mag.	Depth	Location	Source
0.9	0.6 km	3km SW of Cobb, CA	USGS
0.9	0.6 km	Northern California	RaspberryShake
0.9	10 km	Northern California	IRIS

Most recent quakes Top 20 past 24 hrs Quakes in the US California

Seismograms

Seismic station: Marconi Conference Center, Marshall, CA, USA (MCCM/BK network) | Distance from quake: 74 km / 46 mi | Show on map | Station Info

Seismic station Marconi Conference Center, Marshall, CA, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Marconi Conference Center, Marshall, CA, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Marconi Conference Center, Marshall, CA, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Columbia College, Columbia, CA, USA (CMB/BK network) | Distance from quake: 223 km / 138 mi | Show on map | Station Info

Seismic station Columbia College, Columbia, CA, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Columbia College, Columbia, CA, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Columbia College, Columbia, CA, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: San Andreas Geophysical Obs., Hollister, CA, USA (SAO/BK network) | Distance from quake: 254 km / 158 mi | Show on map | Station Info

Seismic station San Andreas Geophysical Obs., Hollister, CA, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station San Andreas Geophysical Obs., Hollister, CA, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station San Andreas Geophysical Obs., Hollister, CA, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Mammoth (MLAC/CI network) | Distance from quake: 366 km / 227 mi | Show on map | Station Info

Seismic station Mammoth: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Mammoth: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Mammoth: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Valley Oaks Golf Course (VOG/CI network) | Distance from quake: 405 km / 252 mi | Show on map | Station Info

Seismic station Valley Oaks Golf Course: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Valley Oaks Golf Course: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Valley Oaks Golf Course: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

At magnitude 0.9, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.

Earlier earthquakes in the same area since 1900

Date and time GMT	Mag Depth	Distance	Location	Details
Apr 18, 1906 13:12 117 years ago	7.9 12 km	118km / 74mi	White Island, 5.7 mi NW of Daly City, San Mateo County, California, USA	More
Apr 25, 1992 18:06 31 years ago	7.2 9.9 km	213km / 132mi	32 mi S of Eureka, Humboldt County, California, USA	More
Oct 18, 1989 00:04 33 years ago	6.9 17 km	211km / 131mi	9.4 mi NE of Santa Cruz, California, USA	More
Jan 22, 1923 09:04 100 years ago	6.9 15 km	268km / 167mi	58 mi SW of Eureka, Humboldt County, California, USA	More
Mar 10, 2014 05:18 9 years ago	6.8 17 km	304km / 189mi	North Pacific Ocean, 51 mi W of Eureka, Humboldt County, California, USA	More
Feb 9, 1941 09:44 82 years ago	6.8 15 km	298km / 185mi	57 mi W of Eureka, Humboldt County, California, USA	More
Apr 26, 1992 11:18 31 years ago	6.6 22 km	234km / 146mi	36 mi SW of Eureka, Humboldt County, California, USA	More
Sep 10, 1984 03:14 38 years ago	6.6 4.3 km	278km / 173mi	55 mi W of Eureka, Humboldt County, California, USA	More
Jul 1, 1911 22:00 112 years ago	6.6 0 km	194km / 120mi	10.1 mi SE of San Jose, Santa Clara County, California, USA	More
Jan 10, 2010 00:27 13 years ago	6.5 29 km	265km / 164mi	30 mi W of Eureka, Humboldt County, California, USA	More
Jan 10, 2010 00:27 13 years ago	6.5 29 km	265km / 164mi	30 mi W of Eureka, Humboldt County, California, USA	More
Apr 26, 1992 07:41 31 years ago	6.5 19 km	239km / 149mi	33 mi SW of Eureka, Humboldt County, California, USA	More
Dec 21, 1954 19:56 68 years ago	6.5 0 km	251km / 156mi	1.3 mi S of Eureka, Humboldt County, California, USA	More
Oct 3, 1941 16:13 81 years ago	6.4 10 km	278km / 173mi	54 mi SW of Eureka, Humboldt County, California, USA	More
Jun 6, 1932 08:44 91 years ago	6.4 15 km	248km / 154mi	5.6 mi SW of Eureka, Humboldt County, California, USA	More
Oct 29, 1909 06:45 113 years ago	6.4 0 km	226km / 141mi	4.9 mi W of Rio Dell, Humboldt County, California, USA	More
Apr 23, 1906 09:10 117 years ago	6.4 0 km	267km / 166mi	6.4 mi NE of McKinleyville, Humboldt County, California, USA	More
Nov 26, 1976 11:19 46 years ago	6.3 42 km	311km / 193mi	44 mi W of Eureka, Humboldt County, California, USA	More
Oct 22, 1926 13:35 96 years ago	6.3 10 km	236km / 147mi	19 mi SW of Santa Cruz, California, USA	More
Dec 20, 2021 20:10 1 year 5 weeks ago	6.2 15 km	239km / 148mi	North Pacific Ocean, 45 mi SW of Eureka, Humboldt County, California, USA	More
Apr 24, 1984 21:15 39 years ago	6.2 8.2 km	191km / 118mi	12 mi E of San Jose, Santa Clara County, California, USA	More
Jul 24, 1959 01:23 64 years ago	6.2 15 km	325km / 202mi	58 mi W of Eureka, Humboldt County, California, USA	More
Oct 22, 1926 12:35 96 years ago	6.1 0 km	246km / 153mi	30 mi SW of Santa Cruz, California, USA	More
Aug 24, 2014 10:20 8 years ago	6.0 11 km	75km / 47mi	Mare Island, 5.5 mi S of Napa, California, USA	More
Aug 24, 2014 10:20 8 years ago	6.0 11 km	75km / 47mi	Mare Island, 5.5 mi S of Napa, California, USA	More
Aug 17, 1991 19:29 31 years ago	6.0 8.3 km	208km / 129mi	39 mi S of Eureka, Humboldt County, California, USA	More
Jun 6, 1960 01:17 63 years ago	6.0 15 km	277km / 172mi	33 mi W of Eureka, Humboldt County, California, USA	More
Sep 22, 1952 11:41 70 years ago	6.0 15 km	209km / 130mi	27 mi S of Fortuna, Humboldt County, California, USA	More
Oct 8, 1951 04:10 71 years ago	6.0 15 km	232km / 144mi	38 mi SW of Fortuna, Humboldt County, California, USA	More
Dec 29, 1948 12:53 74 years ago	6.0 0 km	244km / 152mi	Sierra County, California, 14 mi W of Reno, Washoe County, Nevada, USA	More
Mar 19, 1910 00:11 113 years ago	6.0 0 km	235km / 146mi	71 mi SW of Eureka, Humboldt County, California, USA	More
Mar 31, 1986 11:55 37 years ago	5.7 8.5 km	174km / 108mi	15 mi NE of San Jose, Santa Clara County, California, USA	More
Aug 1, 1975 20:20 48 years ago	5.7 5 km	125km / 78mi	21 mi N of Yuba City, Sutter County, California, USA	More
Feb 8, 1940 08:05 83 years ago	5.7 0 km	166km / 103mi	13 mi N of Magalia, Butte County, California, USA	More
Dec 20, 1940 23:40 82 years ago	5.5 0 km	171km / 106mi	12 mi SW of Redway, Humboldt County, California, USA	More
Sep 12, 1938 06:10 84 years ago	5.5 0 km	171km / 106mi	12 mi SW of Redway, Humboldt County, California, USA	More
Jan 27, 1980 02:33 43 years ago	5.4 14 km	148km / 92mi	5.7 mi NE of Livermore, Alameda County, California, USA	More
Oct 24, 1955 04:10 67 years ago	5.4 0 km	111km / 69mi	Ryer Island, 1.3 mi SW of Concord, Contra Costa County, California, USA	More
May 19, 1902 18:31 121 years ago	5.4 0 km	92km / 57mi	6.2 mi SE of Vacaville, Solano County, California, USA	More
Mar 22, 1957 19:44 66 years ago	5.3 0 km	128km / 80mi	San Pedro Rock, 2.9 mi SW of Daly City, San Mateo County, California, USA	More
Aug 2, 1975 20:58 48 years ago	5.2 1.5 km	130km / 81mi	Butte County, 22 mi N of Yuba City, Sutter County, California, USA	More
Jun 6, 1962 17:50 61 years ago	5.2 10 km	46km / 29mi	6.4 mi E of Ukiah, Mendocino County, California, USA	More
Dec 14, 2016 16:41 6 years ago	5.1 1 km	8km / 5mi	6.3 mi W of Cobb, Lake County, California, USA	More
Aug 10, 2016 02:57 6 years ago	5.1 18 km	57km / 35mi	Split Rock, 13 mi N of Nice, Lake County, California, USA	More
Jan 24, 1980 19:01 43 years ago	5.1 6.5 km	139km / 86mi	Contra Costa County, 8.9 mi N of Livermore, Alameda County, California, USA	More
Aug 2, 1975 20:22 48 years ago	5.1 1.7 km	131km / 81mi	Butte County, 23 mi N of Yuba City, Sutter County, California, USA	More
Oct 2, 1969 06:19 53 years ago	5.1 10 km	39km / 24mi	1.6 mi NE of Santa Rosa, Sonoma County, California, USA	More
Apr 29, 1968 00:21 55 years ago	5.0 23 km	103km / 64mi	Glenn County, 16 mi SW of Chico, Butte County, California, USA	More
Sep 3, 2000 08:36 22 years ago	4.9 9.4 km	55km / 34mi	8.9 mi NW of Napa, California, USA	More
Aug 8, 1975 07:00 48 years ago	4.9 8.1 km	132km / 82mi	2.1 mi W of Oroville East, Butte County, California, USA	More
Sep 10, 1965 21:28 57 years ago	4.9 0 km	119km / 74mi	Ryer Island, 1 mi W of Antioch, Contra Costa County, California, USA	More
Apr 18, 2007 08:42 16 years ago	4.8 4.7 km	80km / 50mi	Split Rock, 22 mi N of Ukiah, Mendocino County, California, USA	More
Sep 4, 1995 14:16 27 years ago	4.8 6.6 km	13km / 8mi	17 mi N of Santa Rosa, Sonoma County, California, USA	More
Jan 24, 1980 19:03 43 years ago	4.8 3.7 km	137km / 85mi	Contra Costa County, 10.5 mi N of Livermore, Alameda County, California, USA	More
Nov 22, 1977 21:15 45 years ago	4.8 15 km	81km / 50mi	18 mi N of Ukiah, Mendocino County, California, USA	More
Nov 12, 1973 03:39 49 years ago	4.8 18 km	80km / 50mi	16 mi NW of Ukiah, Mendocino County, California, USA	More
Oct 2, 1969 04:56 53 years ago	4.8 10 km	38km / 23mi	2.2 mi NE of Santa Rosa, Sonoma County, California, USA	More
Dec 20, 2021 20:10 1 year 5 weeks ago	4.7 17 km	85km / 53mi	11 mi SW of Novato, Marin County, California, USA	More
May 30, 2015 11:33 8 years ago	4.7 39 km	100km / 62mi	California, 7.7 mi W of Brooktrails, Mendocino County, USA	More
May 12, 2006 10:37 17 years ago	4.7 3.6 km	6km / 4mi	Sonoma County, 14 mi SW of Clearlake, Lake County, California, USA	More
Aug 1, 1986 04:53 37 years ago	4.7 58 km	93km / 58mi	25 mi N of Ukiah, Mendocino County, California, USA	More
Aug 6, 1975 03:50 48 years ago	4.7 8.7 km	130km / 80mi	3.6 mi W of Oroville East, Butte County, California, USA	More
Aug 1, 1975 20:25 48 years ago	4.7 0 km	127km / 79mi	Butte County, 21 mi N of Yuba City, Sutter County, California, USA	More
Aug 1, 1975 16:27 48 years ago	4.7 5.5 km	126km / 78mi	25 mi SE of Chico, Butte County, California, USA	More
Oct 14, 1962 10:14 60 years ago	4.7 0 km	112km / 70mi	24 mi SW of Point Arena, Mendocino County, California, USA	More
Dec 11, 1958 09:52 64 years ago	4.7 0 km	124km / 77mi	San Pedro Rock, 5.8 mi W of Daly City, San Mateo County, California, USA	More
Oct 31, 1957 02:47 65 years ago	4.7 0 km	91km / 57mi	10.6 mi SE of Mendocino, California, USA	More
Oct 20, 2006 17:00 16 years ago	4.6 2.5 km	8km / 5mi	10.7 mi SW of Clearlake, Lake County, California, USA	More
Feb 18, 2004 20:37 19 years ago	4.6 2.6 km	4km / 3mi	Lake County, 28 mi N of Santa Rosa, Sonoma County, California, USA	More
Jan 11, 2000 14:19 23 years ago	4.6 5.8 km	15km / 9mi	25 mi NW of Santa Rosa, Sonoma County, California, USA	More
Aug 18, 1999 01:06 23 years ago	4.6 7.7 km	100km / 62mi	Peninsula Island, 9.6 mi SW of San Rafael, Marin County, California, USA	More
Jan 25, 1980 05:24 43 years ago	4.6 9.3 km	134km / 83mi	9.5 mi S of Antioch, Contra Costa County, California, USA	More
Sep 27, 1975 22:34 47 years ago	4.6 8.4 km	131km / 82mi	3.4 mi W of Oroville East, Butte County, California, USA	More
Aug 3, 1975 01:03 48 years ago	4.6 7.1 km	130km / 81mi	24 mi SE of Chico, Butte County, California, USA	More
Aug 1, 1975 20:29 48 years ago	4.6 0 km	127km / 79mi	Butte County, 21 mi N of Yuba City, Sutter County, California, USA	More
Jun 12, 1970 03:30 53 years ago	4.6 9 km	132km / 82mi	2.9 mi NE of San Ramon, Contra Costa County, California, USA	More
Apr 25, 1968 19:49 55 years ago	4.6 8 km	36km / 23mi	2.6 mi N of Santa Rosa, Sonoma County, California, USA	More
May 7, 1955 11:50 68 years ago	4.6 0 km	18km / 11mi	3.4 mi SW of Kelseyville, Lake County, California, USA	More
May 2, 1946 01:26 77 years ago	4.6 0 km	160km / 99mi	9.2 mi E of Livermore, Alameda County, California, USA	More
Oct 25, 1941 07:09 81 years ago	4.6 0 km	92km / 57mi	2.1 mi SE of Willows, Glenn County, California, USA	More
Feb 25, 1919 22:38 104 years ago	4.6 0 km	57km / 35mi	1.5 mi NW of Boyes Hot Springs, Sonoma County, California, USA	More
Oct 15, 2019 05:33 3 years ago	4.5 14 km	113km / 70mi	0.7 mi S of Pleasant Hill, Contra Costa County, California, USA	More
Jan 4, 2018 10:39 5 years ago	4.5 13 km	114km / 71mi	Yerba Buena Island, 2 mi SE of Berkeley, Alameda County, California, USA	More
Jan 12, 2014 20:24 9 years ago	4.5 2.5 km	6km / 4mi	5 mi W of Cobb, Lake County, California, USA	More
Mar 14, 2013 09:09 10 years ago	4.5 2.2 km	4km / 2mi	3.5 mi W of Cobb, Lake County, California, USA	More
Sep 25, 2012 15:15 10 years ago	4.5 12 km	54km / 34mi	2.5 mi NE of Ukiah, Mendocino County, California, USA	More
Apr 24, 2007 21:08 16 years ago	4.5 1.7 km	4km / 3mi	Sonoma County, 4.4 mi SW of Cobb, Lake County, California, USA	More
Aug 3, 2006 03:08 16 years ago	4.5 8.6 km	51km / 32mi	6.3 mi E of Rohnert Park, Sonoma County, California, USA	More
Sep 19, 1992 23:04 30 years ago	4.5 2.9 km	7km / 5mi	Lake County, 29 mi N of Santa Rosa, Sonoma County, California, USA	More
Sep 11, 1986 07:39 36 years ago	4.5 4.1 km	74km / 46mi	Split Rock, 28 mi NE of Ukiah, Mendocino County, California, USA	More
Mar 26, 1978 00:27 45 years ago	4.5 12 km	57km / 36mi	4.9 mi NE of Ukiah, Mendocino County, California, USA	More
Aug 1, 1975 20:20 48 years ago	4.5 4.4 km	125km / 78mi	21 mi N of Yuba City, Sutter County, California, USA	More
May 24, 1966 03:49 57 years ago	4.5 20 km	138km / 86mi	5.2 mi NE of Chico, Butte County, California, USA	More
Dec 17, 1954 07:08 68 years ago	4.5 0 km	132km / 82mi	1.4 mi SE of San Leandro, Alameda County, California, USA	More
Mar 8, 1937 10:31 86 years ago	4.5 0 km	121km / 75mi	Yerba Buena Island, 3.9 mi E of Oakland, Alameda County, California, USA	More
Dec 12, 1930 09:32 92 years ago	4.5 0 km	135km / 84mi	11 mi NW of Laytonville, Mendocino County, California, USA	More
Oct 8, 1915 05:25 107 years ago	4.5 0 km	117km / 72mi	Yerba Buena Island, 2.1 mi NE of Oakland, Alameda County, California, USA	More
Feb 14, 1909 15:55 114 years ago	4.5 0 km	120km / 75mi	Venice Island, 8.7 mi NE of Antioch, Contra Costa County, California, USA	More
Jul 30, 1904 10:26 119 years ago	4.5 0 km	73km / 45mi	2.3 mi SW of Winters, Yolo County, California, USA	More
Jul 24, 1903 20:26 120 years ago	4.5 0 km	101km / 63mi	Glenn County, 18 mi SW of Chico, Butte County, California, USA	More

Show all

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