Very strong mag. 6.9 earthquake - Indian Ocean, 29 km west of Pulau Benggala Island, Aceh, Indonesia, on Monday, 4 April 1983 at 02:51 (GMT)

Very strong mag. 6.9 earthquake - Indian Ocean, 29 km west of Pulau Benggala Island, Aceh, Indonesia, on Monday, 4 April 1983 at 02:51 (GMT)

Very strong magnitude 6.9 earthquake at 79 km depth

Date & time: 4 Apr 1983 02:51:34 UTC
Magnitude: 6.9
Depth: 78.5 km
Epicenter latitude / longitude: 5.723°N / 94.722°E (Indian Ocean, Indonesia)
Nearest volcano: Pulau Weh (63 km / 39 mi)
Nearby towns and cities:
68 km (42 mi) WSW of Sabang (pop: 24,500) --> See nearby quakes!
71 km (44 mi) WNW of Banda Aceh (pop: 250,800) --> See nearby quakes!
142 km (88 mi) WNW of Sigli (Kabupaten Pidie) (pop: 17,500) --> See nearby quakes!
182 km (113 mi) WNW of Reuleuet (pop: 40,400) --> See nearby quakes!
227 km (141 mi) WNW of Bireun (Kabupaten Bireuen) (pop: 25,800) --> See nearby quakes!
235 km (146 mi) NW of Meulaboh (Kabupaten Aceh Barat) (pop: 35,100) --> See nearby quakes!
276 km (171 mi) WNW of Lhokseumawe (pop: 89,000) --> See nearby quakes!
479 km (298 mi) WNW of Binjai (pop: 228,800) --> See nearby quakes!
490 km (304 mi) WNW of Belawan (pop: 102,700) --> See nearby quakes!
498 km (309 mi) WNW of Medan (pop: 1,751,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1015 joules (392 gigawatt hours, equivalent to 3.4 x 105 tons of TNT or 21.1 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.
MagnitudeDepthLocationSource
M 6.979 kmnorthern Sumatra, IndonesiaUSGS
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

More info
Recorded aftershocks, latest first (19 quakes):
  • 22 Sep 1983 05:27 UTC
    | M 4.5 |
    82 km (51 mi) depth
    |
    30 km (18 mi) distance
    | USGS | Details
  • 17 Sep 1983 05:56 UTC
    | M 6.1 |
    66.4 km (41.3 mi) depth
    |
    114 km (71 mi) distance
    | USGS | Strong mag. 6.1 earthquake - Indian Ocean, 40 km west of Pulau Raya Island, Aceh, Indonesia, on Saturday, 17 September 1983 at 05:56 (GMT)
  • 15 Sep 1983 03:38 UTC
    | M 4.9 |
    79.4 km (49.3 mi) depth
    |
    33 km (20 mi) distance
    | USGS | Details
  • 18 Aug 1983 19:23 UTC
    | M 4.8 |
    71.8 km (44.6 mi) depth
    |
    117 km (73 mi) distance
    | USGS | Details
  • 31 Jul 1983 16:32 UTC
    | M 4.4 |
    98.8 km (61.4 mi) depth
    |
    12 km (7 mi) distance
    | USGS | Details
  • 07 Jul 1983 19:04 UTC
    | M 4.1 |
    110.3 km (68.5 mi) depth
    |
    44 km (27 mi) distance
    | USGS | Details
  • 02 Jul 1983 09:34 UTC
    | M 5.7 |
    92.6 km (57.5 mi) depth
    |
    3 km (2 mi) distance
    | USGS | Details
  • 07 Jun 1983 06:31 UTC
    | M 4.8 |
    109.9 km (68.3 mi) depth
    |
    67 km (41 mi) distance
    | USGS | Details
  • 18 May 1983 02:20 UTC
    | M 3.9 |
    33 km (20.5 mi) depth
    |
    55 km (34 mi) distance
    | USGS | Details
  • 15 May 1983 23:06 UTC
    | M 4.0 |
    33 km (20.5 mi) depth
    |
    61 km (38 mi) distance
    | USGS | Details
  • 14 May 1983 17:51 UTC
    | M 4.5 |
    78.4 km (48.7 mi) depth
    |
    36 km (22 mi) distance
    | USGS | Details
  • 14 May 1983 12:16 UTC
    | M 4.2 |
    33 km (20.5 mi) depth
    |
    47 km (29 mi) distance
    | USGS | Details
  • 14 May 1983 11:25 UTC
    | M 4.9 |
    22.6 km (14 mi) depth
    |
    51 km (32 mi) distance
    | USGS | Details
  • 13 May 1983 12:27 UTC
    | M 4.3 |
    104 km (64.6 mi) depth
    |
    116 km (72 mi) distance
    | USGS | Details
  • 17 Apr 1983 03:30 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    79 km (49 mi) distance
    | USGS | Details
  • 11 Apr 1983 23:03 UTC
    | M 4.2 |
    78.8 km (49 mi) depth
    |
    16 km (10 mi) distance
    | USGS | Details
  • 08 Apr 1983 06:21 UTC
    | M 4.7 |
    79.7 km (49.5 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details
  • 04 Apr 1983 06:59 UTC
    | M 5.0 |
    79.6 km (49.5 mi) depth
    |
    12 km (7 mi) distance
    | USGS | Details
  • 04 Apr 1983 03:03 UTC
    | M 5.9 |
    69.5 km (43.2 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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