Major magnitude 7.3 earthquake - Isla La Palma, Guerrero, 17 km northeast of Lazaro Cardenas, Michoacan, Mexico, on Sunday, October 25, 1981 at 03:22 (GMT)

Major magnitude 7.3 earthquake - Isla La Palma, Guerrero, 17 km northeast of Lazaro Cardenas, Michoacan, Mexico, on Sunday, October 25, 1981 at 03:22 (GMT)

Major magnitude 7.3 earthquake at 33 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Oct 25, 1981 03:22:15 UTC
Magnitude: 7.3
Depth: 33.0 km
Epicenter latitude / longitude: 18.048°N / 102.084°W (Petacalco, Guerrero, Mexico)
Antipode: 18.048°S / 77.916°E
Nearest volcano: Paricutín (Michoacán-Guanajuato) (162 km / 101 mi)
Nearby towns and cities:
8 km (5 mi) NNE of Petacalco (pop: 2,720) --> See nearby quakes!
14 km (9 mi) ENE of Las Guacamayas (Michoacán) (pop: 38,000) --> See nearby quakes!
16 km (10 mi) ENE of La Orilla (Michoacán) (pop: 20,100) --> See nearby quakes!
17 km (10 mi) ENE of Lazaro Cardenas (Michoacán) (pop: 79,200) --> See nearby quakes!
30 km (19 mi) WNW of La Union (pop: 3,240) --> See nearby quakes!
41 km (25 mi) SSE of Arteaga (Centro, Michoacán) (pop: 10,500) --> See nearby quakes!
72 km (45 mi) NW of Zihuatanejo (pop: 67,400) --> See nearby quakes!
207 km (128 mi) SSW of Morelia (Michoacán) (pop: 597,500) --> See nearby quakes!
279 km (173 mi) W of Chilpancingo (pop: 187,300) --> See nearby quakes!
347 km (216 mi) WSW of Mexico City (pop: 12,294,200) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5.6 x 1015 joules (1562 gigawatt hours, equivalent to 1.3 x 106 tons of TNT or 84 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
7.333 kmGuerrero, MexicoUSGS
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 (52 quakes)

  • 11 Oct 1983 04:51 UTC
    | M 4.3 |
    33 km (20.5 mi) depth
    |
    163 km (101 mi) distance
    | USGS | Details
  • 16 Sep 1983 21:02 UTC
    | M 4.1 |
    33 km (20.5 mi) depth
    |
    137 km (85 mi) distance
    | USGS | Details
  • 13 Sep 1983 02:19 UTC
    | M 5.3 |
    75 km (46.6 mi) depth
    |
    159 km (99 mi) distance
    | USGS | Details
  • 17 Aug 1983 05:14 UTC
    | M 4.0 |
    33 km (20.5 mi) depth
    |
    72 km (45 mi) distance
    | USGS | Details
  • 06 Aug 1983 21:28 UTC
    | M 4.3 |
    95.1 km (59.1 mi) depth
    |
    190 km (118 mi) distance
    | USGS | Details
  • 30 Jul 1983 00:57 UTC
    | M 4.4 |
    33 km (20.5 mi) depth
    |
    245 km (152 mi) distance
    | USGS | Details
  • 23 Jul 1983 05:07 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    254 km (158 mi) distance
    | USGS | Details
  • 24 Jun 1983 00:17 UTC
    | M 4.5 |
    65.7 km (40.8 mi) depth
    |
    157 km (98 mi) distance
    | USGS | Details
  • 15 Jun 1983 04:58 UTC
    | M 4.0 |
    33 km (20.5 mi) depth
    |
    96 km (60 mi) distance
    | USGS | Details
  • 15 Jun 1983 04:26 UTC
    | M 3.6 |
    33 km (20.5 mi) depth
    |
    158 km (98 mi) distance
    | USGS | Details
  • 04 Jun 1983 11:31 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    109 km (68 mi) distance
    | USGS | Details
  • 25 May 1983 20:26 UTC
    | M 4.2 |
    33 km (20.5 mi) depth
    |
    148 km (92 mi) distance
    | USGS | Details
  • 11 Mar 1983 03:05 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    268 km (166 mi) distance
    | USGS | Details
  • 21 Feb 1983 10:06 UTC
    | M 4.3 |
    83 km (51.6 mi) depth
    |
    257 km (160 mi) distance
    | USGS | Details
  • 30 Jan 1983 05:53 UTC
    | M 4.4 |
    36.1 km (22.4 mi) depth
    |
    92 km (57 mi) distance
    | USGS | Details
  • 25 Jan 1983 20:36 UTC
    | M 4.8 |
    51.9 km (32.2 mi) depth
    |
    250 km (155 mi) distance
    | USGS | Details
  • Show all

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