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Major mag. 7.4 earthquake - Atacama, Chile on Tuesday, 4 October 1983

Major mag. 7.4 earthquake  - Atacama, Chile on Tuesday, 4 October 1983
Date & time: Tuesday, 4 October 1983 18:52 UTC
Magnitude: 7.4
Depth: 14.8 km
Epicenter latitude / longitude: 26.535°S / 70.563°W (Chile)
Nearest volcano: Copiapo (166 km / 103 mi)
Nearby towns and cities:
54 km (34 mi) SW of Diego de Almagro (pop: 18,100)
95 km (59 mi) NW of Copiapó (pop: 129,300)
126 km (78 mi) S of Taltal (pop: 10,000)
770 km (478 mi) N of Santiago (pop: 4,837,300)
Primary data source: USGS
Estimated released energy: 7.9 x 1015 joules (2206 gigawatt hours, equivalent to 1.9 x 106 tons of TNT or 118.7 atomic bombs!) [learn more]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
TimeMag. / DepthLocationSource
Tue, 4 Oct 18:52 UTCM 7.4 / 14.8 kmAtacama, ChileUSGS
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!

Aftershocks of the 7.4 quake: Atacama, Chile, 4 Oct 1983 18:52

More info
Recorded aftershocks, latest first (19 quakes):
  • 19 Sep 1985 10:54 UTC
    | M 5.1 |
    53.8 km (33.4 mi) depth
    |
    178 km (111 mi) distance
    | USGS | Details
  • 01 Jul 1985 18:49 UTC
    | M 5.0 |
    102.3 km (63.6 mi) depth
    |
    191 km (119 mi) distance
    | USGS | Details
  • 03 Jun 1985 17:56 UTC
    | M 5.4 |
    33 km (20.5 mi) depth
    |
    170 km (106 mi) distance
    | USGS | Details
  • 14 Mar 1985 11:44 UTC
    | M 5.1 |
    40.4 km (25.1 mi) depth
    |
    163 km (101 mi) distance
    | USGS | Details
  • 02 Mar 1985 11:44 UTC
    | M 5.1 |
    10 km (6.2 mi) depth
    |
    102 km (63 mi) distance
    | USGS | Details
  • 03 Dec 1984 00:40 UTC
    | M 5.0 |
    10 km (6.2 mi) depth
    |
    185 km (115 mi) distance
    | USGS | Details
  • 24 Jul 1984 04:49 UTC
    | M 5.8 |
    34.1 km (21.2 mi) depth
    |
    90 km (56 mi) distance
    | USGS | Details
  • 04 Mar 1984 22:34 UTC
    | M 5.4 |
    33 km (20.5 mi) depth
    |
    31 km (19 mi) distance
    | USGS | Details
  • 31 Dec 1983 00:44 UTC
    | M 5.5 |
    55.1 km (34.2 mi) depth
    |
    72 km (45 mi) distance
    | USGS | Details
  • 23 Dec 1983 22:56 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    143 km (89 mi) distance
    | USGS | Details
  • 17 Oct 1983 01:19 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    48 km (30 mi) distance
    | USGS | Details
  • 14 Oct 1983 06:36 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    68 km (42 mi) distance
    | USGS | Details
  • 13 Oct 1983 09:00 UTC
    | M 5.3 |
    8.6 km (5.3 mi) depth
    |
    61 km (38 mi) distance
    | USGS | Details
  • 12 Oct 1983 11:33 UTC
    | M 5.2 |
    27.1 km (16.8 mi) depth
    |
    106 km (66 mi) distance
    | USGS | Details
  • 09 Oct 1983 11:25 UTC
    | M 6.7 |
    16.1 km (10 mi) depth
    |
    45 km (28 mi) distance
    | USGS | Strong mag. 6.7 earthquake - Atacama, Chile on Sunday, 9 October 1983
  • 06 Oct 1983 15:01 UTC
    | M 5.5 |
    19.7 km (12.2 mi) depth
    |
    40 km (25 mi) distance
    | USGS | Details
  • 06 Oct 1983 06:01 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    74 km (46 mi) distance
    | USGS | Details
  • 04 Oct 1983 22:57 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    11 km (7 mi) distance
    | USGS | Details
  • 04 Oct 1983 19:26 UTC
    | M 5.7 |
    31.2 km (19.4 mi) depth
    |
    24 km (15 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

Major mag. 7.4 earthquake - Atacama, Chile on Tuesday, 4 October 1983
 

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