Moderate mag. 5.1 earthquake - Northern California (USA) on Saturday, 2 August 1975 at 20:22 (GMT)

Moderate mag. 5.1 earthquake - Northern California (USA) on Saturday, 2 August 1975 at 20:22 (GMT)

Moderate magnitude 5.1 earthquake at 2 km depth

Date & time: 2 Aug 1975 20:22:16 UTC
Magnitude: 5.1
Depth: 1.7 km
Epicenter latitude / longitude: 39.44933°N / 121.4795°W (California, United States)
Nearest volcano: Sutter Buttes (40 km / 25 mi)
Nearby towns and cities:
5 km (3 mi) ENE of Palermo (Butte County) (pop: 5,380) --> See nearby quakes!
7 km (4 mi) S of Oroville East (Butte County) (pop: 8,280) --> See nearby quakes!
21 km (13 mi) ENE of Gridley (pop: 6,580) --> See nearby quakes!
36 km (23 mi) NNE of Yuba City (pop: 66,900) --> See nearby quakes!
37 km (23 mi) SSE of Paradise (Butte County) (pop: 26,500) --> See nearby quakes!
44 km (27 mi) SE of Chico (pop: 90,300) --> See nearby quakes!
44 km (27 mi) NW of Grass Valley (pop: 12,900) --> See nearby quakes!
64 km (40 mi) NNW of Lincoln (pop: 46,500) --> See nearby quakes!
3793 km (2357 mi) WNW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
3793 km (2357 mi) WNW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.8 x 1012 joules (783 megawatt hours, equivalent to 674 tons of TNT) More info
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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.
MagnitudeDepthLocationSource
M 5.11.7 kmNorthern California (USA)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake yet. If you felt it be the first to report it!
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Aftershocks of the 5.1 quake Northern California (USA) 2 August 1975 20:22 GMT

More info
Recorded aftershocks, latest first (590 quakes):
  • 01 Oct 1975 13:17 UTC
    | M 1.9 |
    8.1 km (5 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details
  • 01 Oct 1975 08:47 UTC
    | M 1.4 |
    8.4 km (5.2 mi) depth
    |
    7 km (4 mi) distance
    | USGS | Details
  • 01 Oct 1975 02:55 UTC
    | M 2.7 |
    1.8 km (1.1 mi) depth
    |
    5 km (3 mi) distance
    | USGS | Details
  • 30 Sep 1975 22:36 UTC
    | M 3.1 |
    9.7 km (6 mi) depth
    |
    10 km (6 mi) distance
    | USGS | Details
  • 30 Sep 1975 17:08 UTC
    | M 2.9 |
    5.4 km (3.4 mi) depth
    |
    7 km (4 mi) distance
    | USGS | Details
  • 30 Sep 1975 14:38 UTC
    | M 1.2 |
    4.8 km (3 mi) depth
    |
    5 km (3 mi) distance
    | USGS | Details
  • 30 Sep 1975 13:45 UTC
    | M 2.0 |
    5 km (3.1 mi) depth
    |
    6 km (4 mi) distance
    | USGS | Details
  • 30 Sep 1975 07:28 UTC
    | M 2.2 |
    11 km (6.8 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details
  • 30 Sep 1975 05:37 UTC
    | M 1.6 |
    9.3 km (5.8 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details
  • 30 Sep 1975 01:27 UTC
    | M 1.7 |
    3.5 km (2.2 mi) depth
    |
    2 km (1 mi) distance
    | USGS | Details
  • 30 Sep 1975 00:42 UTC
    | M 1.3 |
    9.3 km (5.8 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details
  • 29 Sep 1975 20:41 UTC
    | M 1.5 |
    3.6 km (2.2 mi) depth
    |
    4 km (2 mi) distance
    | USGS | Details
  • 29 Sep 1975 16:06 UTC
    | M 2.1 |
    9.8 km (6.1 mi) depth
    |
    7 km (4 mi) distance
    | USGS | Details
  • 29 Sep 1975 11:51 UTC
    | M 2.6 |
    5.9 km (3.7 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details
  • 29 Sep 1975 10:09 UTC
    | M 2.5 |
    7.8 km (4.8 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details
  • 29 Sep 1975 09:53 UTC
    | M 1.6 |
    6.8 km (4.2 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details
    • Show all

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Earlier earthquakes in the same area

Moderate mag. 5.1 earthquake - Northern California (USA) on Saturday, 2 August 1975 at 20:22 (GMT)
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