Very strong mag. 6.6 earthquake - North Pacific Ocean, 36 mi southwest of Eureka, Humboldt County, California, USA, on Sunday, April 26, 1992 at 11:18 (GMT)

Very strong mag. 6.6 earthquake - North Pacific Ocean, 36 mi southwest of Eureka, Humboldt County, California, USA, on Sunday, April 26, 1992 at 11:18 (GMT)

Very strong magnitude 6.6 earthquake at 22 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Apr 26, 1992 11:18:25 UTC
Magnitude: 6.6
Depth: 21.7 km
Epicenter latitude / longitude: 40.38283°N / 124.555°W (North Pacific Ocean, California, United States)
Antipode: 40.383°S / 55.445°E
Nearest volcano: Black Butte (216 km / 134 mi)
Nearby towns and cities:
33 km (20 mi) SW of Ferndale (pop: 1,370) --> See nearby quakes!
40 km (25 mi) WSW of Rio Dell (pop: 3,390) --> See nearby quakes!
41 km (26 mi) SW of Fortuna (Humboldt County) (pop: 12,000) --> See nearby quakes!
57 km (36 mi) SW of Eureka (Humboldt County) (pop: 27,000) --> See nearby quakes!
66 km (41 mi) SW of Bayside (Humboldt County) (pop: 17,100) --> See nearby quakes!
67 km (42 mi) SW of Uniontown (Humboldt County) (pop: 17,800) --> See nearby quakes!
69 km (43 mi) WNW of Redway (pop: 1,230) --> See nearby quakes!
73 km (46 mi) SSW of McKinleyville (Humboldt County) (pop: 15,200) --> See nearby quakes!
179 km (111 mi) NW of Ukiah (pop: 15,900) --> See nearby quakes!
184 km (115 mi) W of Redding (pop: 91,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 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
6.622 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

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Recorded aftershocks, latest first (3036 quakes)

  • 23 Oct 1992 05:13 UTC
    | M 1.5 |
    7.7 km (4.8 mi) depth
    |
    23 km (14 mi) distance
    | USGS | Details
  • 23 Oct 1992 05:10 UTC
    | M 2.1 |
    22.9 km (14.2 mi) depth
    |
    4 km (2 mi) distance
    | USGS | Details
  • 23 Oct 1992 01:54 UTC
    | M 1.3 |
    9.3 km (5.8 mi) depth
    |
    13 km (8 mi) distance
    | USGS | Details
  • 22 Oct 1992 21:38 UTC
    | M 1.3 |
    9 km (5.6 mi) depth
    |
    25 km (16 mi) distance
    | USGS | Details
  • 22 Oct 1992 18:58 UTC
    | M 1.7 |
    22.6 km (14 mi) depth
    |
    34 km (21 mi) distance
    | USGS | Details
  • 22 Oct 1992 17:27 UTC
    | M 1.6 |
    21.3 km (13.2 mi) depth
    |
    6 km (4 mi) distance
    | USGS | Details
  • 22 Oct 1992 14:01 UTC
    | M 1.5 |
    16.4 km (10.2 mi) depth
    |
    19 km (12 mi) distance
    | USGS | Details
  • 22 Oct 1992 12:54 UTC
    | M 1.2 |
    8.9 km (5.5 mi) depth
    |
    28 km (17 mi) distance
    | USGS | Details
  • 22 Oct 1992 10:15 UTC
    | M 2.4 |
    3 km (1.9 mi) depth
    |
    27 km (17 mi) distance
    | USGS | Details
  • 22 Oct 1992 10:15 UTC
    | M 2.7 |
    3.8 km (2.4 mi) depth
    |
    27 km (17 mi) distance
    | USGS | Details
  • 22 Oct 1992 09:43 UTC
    | M 1.5 |
    3.1 km (1.9 mi) depth
    |
    26 km (16 mi) distance
    | USGS | Details
  • 22 Oct 1992 01:37 UTC
    | M 1.4 |
    12.4 km (7.7 mi) depth
    |
    26 km (16 mi) distance
    | USGS | Details
  • 21 Oct 1992 23:20 UTC
    | M 2.5 |
    -0.7 km (-0.4 mi) depth
    |
    30 km (19 mi) distance
    | USGS | Details
  • 21 Oct 1992 17:41 UTC
    | M 2.3 |
    19.1 km (11.9 mi) depth
    |
    27 km (17 mi) distance
    | USGS | Details
  • 21 Oct 1992 14:04 UTC
    | M 2.0 |
    18.2 km (11.3 mi) depth
    |
    10 km (6 mi) distance
    | USGS | Details
  • 21 Oct 1992 06:28 UTC
    | M 1.9 |
    22.2 km (13.8 mi) depth
    |
    76 km (47 mi) distance
    | USGS | Details
  • Show all