Major magnitude 7.2 earthquake - North Pacific Ocean, 22 mi north of Eureka, Humboldt County, California, USA, on Saturday, November 8, 1980 at 10:27 (GMT)

Major magnitude 7.2 earthquake - North Pacific Ocean, 22 mi north of Eureka, Humboldt County, California, USA, on Saturday, November 8, 1980 at 10:27 (GMT)

Major magnitude 7.2 earthquake at 19 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Nov 8, 1980 10:27:34 UTC
Magnitude: 7.2
Depth: 19.0 km
Epicenter latitude / longitude: 41.117°N / 124.253°W (North Pacific Ocean, California, United States)
Antipode: 41.117°S / 55.747°E
Nearest volcano: Mount Shasta (175 km / 109 mi)
Nearby towns and cities:
11 km (7 mi) WSW of Big Lagoon (pop: 93) --> See nearby quakes!
15 km (9 mi) WNW of Westhaven-Moonstone (pop: 1,210) --> See nearby quakes!
23 km (14 mi) NW of McKinleyville (Humboldt County) (pop: 15,200) --> See nearby quakes!
31 km (19 mi) NNW of Uniontown (Humboldt County) (pop: 17,800) --> See nearby quakes!
34 km (21 mi) NNW of Bayside (Humboldt County) (pop: 17,100) --> See nearby quakes!
36 km (22 mi) NNW of Eureka (Humboldt County) (pop: 27,000) --> See nearby quakes!
58 km (36 mi) N of Fortuna (Humboldt County) (pop: 12,000) --> See nearby quakes!
71 km (44 mi) S of Crescent City (Del Norte County) (pop: 6,770) --> See nearby quakes!
325 km (202 mi) NNW of Santa Rosa (pop: 175,000) --> See nearby quakes!
367 km (228 mi) NW of Sacramento (pop: 490,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 4 x 1015 joules (1106 gigawatt hours, equivalent to 9.5 x 105 tons of TNT or 59.5 atomic bombs!) 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.
Mag.DepthLocationSource
7.219 kmoffshore Northern 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.
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Aftershocks

More info

Recorded aftershocks, latest first (136 quakes)

  • 06 Feb 1982 12:02 UTC
    | M 5.2 |
    5.2 km (3.2 mi) depth
    |
    76 km (47 mi) distance
    | USGS | Details
  • 05 May 1981 06:03 UTC
    | M 3.4 |
    25.8 km (16 mi) depth
    |
    92 km (57 mi) distance
    | USGS | Details
  • 05 May 1981 01:06 UTC
    | M 3.2 |
    8.5 km (5.3 mi) depth
    |
    122 km (76 mi) distance
    | USGS | Details
  • 22 Apr 1981 11:43 UTC
    | M 3.4 |
    4.9 km (3 mi) depth
    |
    115 km (72 mi) distance
    | USGS | Details
  • 20 Apr 1981 23:44 UTC
    | M 3.5 |
    27.3 km (17 mi) depth
    |
    92 km (57 mi) distance
    | USGS | Details
  • 20 Apr 1981 07:23 UTC
    | M 3.2 |
    25.2 km (15.7 mi) depth
    |
    93 km (58 mi) distance
    | USGS | Details
  • 18 Apr 1981 13:17 UTC
    | M 3.8 |
    18.2 km (11.3 mi) depth
    |
    94 km (59 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    12801 km (7954 mi) distance
    | | Details
  • 17 Apr 1981 01:31 UTC
    | M 4.2 |
    4.6 km (2.9 mi) depth
    |
    149 km (92 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    12801 km (7954 mi) distance
    | | Details
  • 16 Apr 1981 01:32 UTC
    | M 3.8 |
    3.3 km (2.1 mi) depth
    |
    103 km (64 mi) distance
    | USGS | Details
  • 13 Apr 1981 22:16 UTC
    | M 4.3 |
    23.4 km (14.5 mi) depth
    |
    91 km (57 mi) distance
    | USGS | Details
  • 03 Apr 1981 00:59 UTC
    | M 3.2 |
    4.7 km (2.9 mi) depth
    |
    58 km (36 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    12801 km (7954 mi) distance
    | | Details
  • 03 Apr 1981 00:19 UTC
    | M 3.2 |
    21.8 km (13.5 mi) depth
    |
    93 km (58 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    12801 km (7954 mi) distance
    | | Details
  • Show all

Earlier earthquakes in the same area

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