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Quake data: Reported (unconfirmed) earthquake: 1.2 mi southeast of San Francisco, California, USA, 25 April 2021 21:37 GMT

This record is considered not to be from an actual earthquake. It could be due to some other (unkown) event causing shaking, such as explosions, sonic booms, weather or other human or natural causes. Even officially reported earthquakes are sometimes removed again later when seismic signals first processed automatically are later re-interpreted manually not to be from real quakes.

This can happen if initial automatic calculations return an earthquake, but turn out to be wrong during subsequent (manual) revision.

The initial report is below:

Although our monitoring service initially detected network activity typical for an earthquake, there was no confirmation by any national or international seismological agency. For this reason, it is highly unlikely, that it was caused by an earthquake.

25 Apr 22:44 UTC: First to report: VolcanoDiscovery after 1 hour and 6 minutes.

I felt this quake

I didn’t feel it

Date & time: 25 Apr 2021 21:37:52 UTC –
Magnitude: unknown
Depth: 10.0 km
Epicenter latitude / longitude: 37.7592°N / 122.4098°W (California, United States)
Nearest volcano: Clear Lake (138 km / 86 mi)
Primary data source: VolcanoDiscovery

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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.

Magnitude Depth Location Source

User reports for this quake (1)

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0 km NW of epicenter [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 minutes

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Earlier earthquakes in the same area since 1900

    Hint: Click on Date/Time to show latest first

  • Date / time UTC

    | Mag |

    Depth

    |

    Age

    |

    Distance

    | Details

  • 18 Apr 1906 13:12

    | 7.9 |

    11.7km / 7.3mi

    |

    115 years ago

    |

    12km / 8mi

    | North Pacific Ocean, 5.7 mi NW of Daly City, San Mateo County, California, USA

  • 18 Oct 1989 00:04

    | 6.9 |

    17.2km / 10.7mi

    |

    32 years ago

    |

    93km / 58mi

    | 9.4 mi NE of Santa Cruz, California, USA

  • 01 Jul 1911 22:00

    | 6.6 |

    unknown

    |

    110 years ago

    |

    81km / 50mi

    | 10.1 mi SE of San Jose, Santa Clara County, California, USA

  • 22 Oct 1926 13:35

    | 6.3 |

    10km / 6.2mi

    |

    95 years ago

    |

    117km / 73mi

    | North Pacific Ocean, 19 mi SW of Santa Cruz, California, USA

  • 24 Apr 1984 21:15

    | 6.2 |

    8.2km / 5.1mi

    |

    37 years ago

    |

    82km / 51mi

    | 12 mi E of San Jose, Santa Clara County, California, USA

  • 22 Nov 1952 07:46

    | 6.2 |

    6km / 3.7mi

    |

    68 years ago

    |

    246km / 153mi

    | North Pacific Ocean, 9.4 mi NW of San Simeon, San Luis Obispo County, California, USA

  • 22 Oct 1926 12:35

    | 6.1 |

    unknown

    |

    95 years ago

    |

    127km / 79mi

    | North Pacific Ocean, 30 mi SW of Santa Cruz, California, USA

  • 24 Aug 2014 10:20

    | 6.0 |

    11.3km / 7mi

    |

    7 years ago

    |

    52km / 32mi

    | 5.5 mi S of Napa, California, USA

  • 24 Aug 2014 10:20

    | 6.0 |

    11km / 6.8mi

    |

    7 years ago

    |

    52km / 32mi

    | 5.5 mi S of Napa, California, USA

  • 06 Aug 1979 17:05

    | 5.8 |

    8.3km / 5.2mi

    |

    42 years ago

    |

    108km / 67mi

    | 7.4 mi NE of Gilroy, Santa Clara County, California, USA

  • Show all

  • 11 Mar 1910 06:52

    | 5.8 |

    unknown

    |

    111 years ago

    |

    110km / 68mi

    | 2.5 mi W of Watsonville, Santa Cruz County, California, USA

  • 03 Aug 1903 06:49

    | 5.8 |

    unknown

    |

    118 years ago

    |

    74km / 46mi

    | 5.9 mi SE of San Jose, Santa Clara County, California, USA

  • 11 Jun 1903 13:12

    | 5.8 |

    unknown

    |

    118 years ago

    |

    60km / 37mi

    | 2 mi S of Milpitas, Santa Clara County, California, USA

  • 31 Mar 1986 11:55

    | 5.7 |

    8.5km / 5.3mi

    |

    35 years ago

    |

    71km / 44mi

    | 15 mi NE of San Jose, Santa Clara County, California, USA

  • 31 Oct 2007 03:04

    | 5.5 |

    9.7km / 6mi

    |

    13 years ago

    |

    67km / 41mi

    | 7.3 mi E of Milpitas, Santa Clara County, California, USA

  • 26 Jan 1986 19:20

    | 5.5 |

    8.2km / 5.1mi

    |

    35 years ago

    |

    146km / 90mi

    | 7.3 mi SE of Hollister, San Benito County, California, USA

  • 05 Sep 1955 02:01

    | 5.5 |

    unknown

    |

    66 years ago

    |

    70km / 44mi

    | 2.4 mi E of Alum Rock, Santa Clara County, California, USA

  • 24 Jun 1939 13:02

    | 5.5 |

    unknown

    |

    82 years ago

    |

    136km / 85mi

    | 4.5 mi SW of Hollister, San Benito County, California, USA

  • 24 Oct 1926 22:51

    | 5.5 |

    unknown

    |

    95 years ago

    |

    84km / 52mi

    | North Pacific Ocean, 10.2 mi W of Santa Cruz, California, USA

  • 18 Apr 1990 13:53

    | 5.4 |

    5.5km / 3.4mi

    |

    31 years ago

    |

    114km / 71mi

    | San Benito County, 5.7 mi E of Watsonville, Santa Cruz County, California, USA

  • 08 Aug 1989 08:13

    | 5.4 |

    13.4km / 8.3mi

    |

    32 years ago

    |

    80km / 50mi

    | 13 mi S of San Jose, Santa Clara County, California, USA

  • 27 Jan 1980 02:33

    | 5.4 |

    14.2km / 8.8mi

    |

    41 years ago

    |

    62km / 38mi

    | 5.7 mi NE of Nottingham, Alameda County, California, USA

  • 14 Sep 1963 19:46

    | 5.4 |

    3km / 1.9mi

    |

    58 years ago

    |

    120km / 75mi

    | 2.5 mi E of Aromas, San Benito County, California, USA

  • 24 Oct 1955 04:10

    | 5.4 |

    unknown

    |

    66 years ago

    |

    39km / 24mi

    | 1.3 mi SW of Concord, Contra Costa County, California, USA

  • 19 May 1902 18:31

    | 5.4 |

    unknown

    |

    119 years ago

    |

    75km / 47mi

    | 6.2 mi SE of Vacaville, Solano County, California, USA

  • 27 Jun 1988 18:43

    | 5.3 |

    12.6km / 7.8mi

    |

    33 years ago

    |

    84km / 52mi

    | Santa Cruz County, 15 mi S of San Jose, Santa Clara County, California, USA

  • 13 Jun 1988 01:45

    | 5.3 |

    9.1km / 5.7mi

    |

    33 years ago

    |

    72km / 45mi

    | 9.2 mi NE of San Jose, Santa Clara County, California, USA

  • 02 Mar 1959 23:27

    | 5.3 |

    unknown

    |

    62 years ago

    |

    112km / 70mi

    | 2.4 mi SW of Gilroy, Santa Clara County, California, USA

  • 22 Mar 1957 19:44

    | 5.3 |

    unknown

    |

    64 years ago

    |

    12km / 8mi

    | 2.9 mi SW of Daly City, San Mateo County, California, USA

  • 25 Apr 1954 20:33

    | 5.3 |

    unknown

    |

    67 years ago

    |

    112km / 70mi

    | 4.4 mi E of Watsonville, Santa Cruz County, California, USA

  • 28 Nov 1974 23:01

    | 5.2 |

    5.3km / 3.3mi

    |

    46 years ago

    |

    125km / 78mi

    | San Benito County, 8.1 mi SE of Gilroy, Santa Clara County, California, USA

  • 16 Nov 1964 02:46

    | 5.2 |

    unknown

    |

    56 years ago

    |

    101km / 63mi

    | 5.6 mi S of Morgan Hill, Santa Clara County, California, USA

  • 09 Mar 1949 12:28

    | 5.2 |

    unknown

    |

    72 years ago

    |

    116km / 72mi

    | 5 mi E of Gilroy, Santa Clara County, California, USA

  • 05 Oct 1920 19:03

    | 5.2 |

    unknown

    |

    101 years ago

    |

    147km / 91mi

    | 6.8 mi S of Salinas, Monterey County, California, USA

  • 14 Dec 2016 16:41

    | 5.1 |

    1km / 0.6mi

    |

    4 years ago

    |

    124km / 77mi

    | Sonoma County, 6.3 mi W of Cobb, Lake County, California, USA

  • 12 Aug 1998 14:10

    | 5.1 |

    8.8km / 5.5mi

    |

    23 years ago

    |

    140km / 87mi

    | 12 mi NE of Salinas, Monterey County, California, USA

  • 18 Apr 1990 15:46

    | 5.1 |

    6.6km / 4.1mi

    |

    31 years ago

    |

    110km / 68mi

    | 5.2 mi NE of Watsonville, Santa Cruz County, California, USA

  • 18 Oct 1989 00:41

    | 5.1 |

    15.3km / 9.5mi

    |

    32 years ago

    |

    71km / 44mi

    | Santa Cruz County, 13 mi SW of San Jose, Santa Clara County, California, USA

  • 20 Feb 1988 08:39

    | 5.1 |

    9.2km / 5.7mi

    |

    33 years ago

    |

    145km / 90mi

    | 6.4 mi SE of Hollister, San Benito County, California, USA

  • 24 Jan 1980 19:01

    | 5.1 |

    6.5km / 4mi

    |

    41 years ago

    |

    56km / 35mi

    | Contra Costa County, 8.9 mi N of Nottingham, Alameda County, California, USA

  • 02 Oct 1969 06:19

    | 5.1 |

    10km / 6.2mi

    |

    52 years ago

    |

    81km / 50mi

    | 1.6 mi NE of Santa Rosa, Sonoma County, California, USA

  • 20 Jan 1960 03:25

    | 5.0 |

    unknown

    |

    61 years ago

    |

    139km / 86mi

    | 5.1 mi S of Hollister, San Benito County, California, USA

  • 13 Dec 1933 15:34

    | 5.0 |

    unknown

    |

    87 years ago

    |

    72km / 45mi

    | 2.3 mi SW of Los Gatos, Santa Clara County, California, USA

  • 15 Feb 1927 23:54

    | 5.0 |

    unknown

    |

    94 years ago

    |

    91km / 56mi

    | North Pacific Ocean, 13 mi W of Santa Cruz, California, USA

  • 08 Aug 1916 16:52

    | 5.0 |

    unknown

    |

    105 years ago

    |

    92km / 57mi

    | 1.6 mi NW of Live Oak, Santa Cruz County, California, USA

  • 31 Dec 1910 12:11

    | 5.0 |

    unknown

    |

    110 years ago

    |

    135km / 84mi

    | 1.9 mi SW of Hollister, San Benito County, California, USA

  • 15 Oct 2019 05:33

    | 4.5 |

    14km / 8.7mi

    |

    1 year 28 weeks ago

    |

    37km / 23mi

    | 0.7 mi S of Pleasant Hill, Contra Costa County, California, USA

  • 16 Jul 2019 20:11

    | 4.3 |

    12.4km / 7.7mi

    |

    1 year 41 weeks ago

    |

    58km / 36mi

    | 8.5 mi SW of Brentwood, Contra Costa County, California, USA

  • 14 Jan 2021 19:18

    | 3.6 |

    15.2km / 9.4mi

    |

    14 weeks ago

    |

    40km / 25mi

    | 0.7 mi SW of Concord, Contra Costa County, California, USA

  • 28 Sep 2020 05:16

    | 3.5 |

    4.8km / 3mi

    |

    30 weeks ago

    |

    59km / 37mi

    | Alameda County, 6.1 mi NE of Milpitas, Santa Clara County, California, USA

  • 27 Sep 2020 22:54

    | 3.4 |

    5.3km / 3.3mi

    |

    30 weeks ago

    |

    60km / 37mi

    | Alameda County, 6.3 mi NE of Milpitas, Santa Clara County, California, USA

  • 17 Aug 2020 20:27

    | 3.4 |

    4.9km / 3mi

    |

    36 weeks ago

    |

    59km / 37mi

    | Alameda County, 6.1 mi NE of Milpitas, Santa Clara County, California, USA

  • 17 Jun 2020 17:35

    | 3.4 |

    8.2km / 5.1mi

    |

    45 weeks ago

    |

    69km / 43mi

    | 3.8 mi NE of East Foothills, Santa Clara County, California, USA

  • 31 Dec 2020 13:41

    | 3.3 |

    12.9km / 8mi

    |

    16 weeks ago

    |

    17km / 10mi

    | North Pacific Ocean, 9.5 mi W of San Francisco, California, USA

  • 29 Sep 2020 16:02

    | 3.3 |

    4.6km / 2.9mi

    |

    30 weeks ago

    |

    59km / 37mi

    | Alameda County, 6.2 mi NE of Milpitas, Santa Clara County, California, USA

  • 17 Aug 2020 20:27

    | 3.3 |

    4.2km / 2.6mi

    |

    36 weeks ago

    |

    59km / 37mi

    | 6.2 mi NE of Milpitas, Santa Clara County, California, USA

  • 06 Sep 2020 18:43

    | 3.2 |

    8.9km / 5.5mi

    |

    33 weeks ago

    |

    25km / 16mi

    | 1.7 mi E of San Leandro, Alameda County, California, USA

  • 08 Feb 2021 00:45

    | 3.1 |

    5.1km / 3.2mi

    |

    11 weeks ago

    |

    59km / 37mi

    | 6.5 mi NE of Milpitas, Santa Clara County, California, USA

  • 20 Apr 2021 21:02

    | 3.0 |

    10km / 6.2mi

    |

    5 days ago

    |

    57km / 35mi

    | 9.6 mi W of San Jose, Santa Clara County, California, USA

  • 01 Apr 2021 19:54

    | 3.0 |

    5km / 3.1mi

    |

    3 weeks ago

    |

    31km / 19mi

    | Alameda County, 4.8 mi W of San Ramon, Contra Costa County, California, USA

  • 22 Jan 2021 00:48

    | 3.0 |

    15.4km / 9.6mi

    |

    13 weeks ago

    |

    41km / 25mi

    | 0.7 mi S of Concord, Contra Costa County, California, USA

  • 07 Jan 2021 11:44

    | 3.0 |

    9.7km / 6mi

    |

    15 weeks ago

    |

    67km / 42mi

    | 4.1 mi NE of East Foothills, Santa Clara County, California, USA

  • 02 Aug 2020 12:40

    | 3.0 |

    9km / 5.6mi

    |

    38 weeks ago

    |

    70km / 43mi

    | 3.9 mi NE of East Foothills, Santa Clara County, California, USA

  • 03 Feb 2021 05:12

    | 2.7 |

    10.1km / 6.3mi

    |

    12 weeks ago

    |

    19km / 12mi

    | 4.4 mi N of Oakland, Alameda County, California, USA

  • 17 Feb 2021 09:13

    | 2.6 |

    3.8km / 2.4mi

    |

    10 weeks ago

    |

    40km / 25mi

    | SAN FRANCISCO BAY AREA, CALIF., USA

  • 07 Apr 2021 13:45

    | 2.5 |

    11.5km / 7.1mi

    |

    3 weeks ago

    |

    37km / 23mi

    | 1km WNW of Pleasant Hill, CA, USA

  • 22 Feb 2021 05:41

    | 2.3 |

    8.2km / 5.1mi

    |

    9 weeks ago

    |

    38km / 24mi

    | 2km SE of Danville, CA, USA

  • 01 Apr 2021 16:50

    | 2.1 |

    7.6km / 4.7mi

    |

    3 weeks ago

    |

    46km / 28mi

    | SAN FRANCISCO BAY AREA, CALIF., USA

  • 01 Feb 2021 13:57

    | 2.1 |

    4.2km / 2.6mi

    |

    12 weeks ago

    |

    27km / 17mi

    | 2km WNW of Castro Valley, CA, USA

  • 28 Jan 2021 06:20

    | 2.1 |

    9.1km / 5.7mi

    |

    13 weeks ago

    |

    33km / 20mi

    | 5km SW of Danville, CA, USA

  • 05 Mar 2021 22:57

    | 2.0 |

    7.2km / 4.5mi

    |

    7 weeks ago

    |

    18km / 11mi

    | 3km ESE of Berkeley, CA, USA

  • 01 Mar 2021 22:33

    | 2.0 |

    8.5km / 5.3mi

    |

    8 weeks ago

    |

    33km / 20mi

    | 6km NNE of Santa Venetia, CA, USA

  • 08 Feb 2021 19:16

    | 2.0 |

    9.5km / 5.9mi

    |

    11 weeks ago

    |

    37km / 23mi

    | SAN FRANCISCO BAY AREA, CALIF., USA

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