Strong mag. 6.4 earthquake - Tonga (Samoa) on Saturday, 8 January 1983 at 11:21 (GMT)

Strong mag. 6.4 earthquake - Tonga (Samoa) on Saturday, 8 January 1983 at 11:21 (GMT)

Strong magnitude 6.4 earthquake at 33 km depth

Date & time: 8 Jan 1983 11:21:29 UTC
Magnitude: 6.4
Profondeur: 33.0 km
Epicenter latitude / longitude: 15.394°S / 173.33°W (Samoa)
Volcan le plus près: Curacoa (44 km / 27 mi)
Nearby towns and cities:
213 km SSO de Vailoa (pop: 769) --> Voir les séismes à proximité!
221 km SSO de Asau (pop: 6,640) --> Voir les séismes à proximité!
223 km SO de Mulifanua (pop: 4,510) --> Voir les séismes à proximité!
231 km SO de Fasito‘outa (pop: 2,100) --> Voir les séismes à proximité!
238 km SSO de Safotu (pop: 1,210) --> Voir les séismes à proximité!
242 km SO de Apia (pop: 40,400) --> Voir les séismes à proximité!
252 km SO de Lufilufi (pop: 1,070) --> Voir les séismes à proximité!
309 km OSO de Pago Pago (Ma'Oputasi, Samoa américaines) (pop: 11,500) --> Voir les séismes à proximité!
386 km SE de Mata-Utu (Hahake, Wallis-et-Futuna) (pop: 1,200) --> Voir les séismes à proximité!
545 km NO de Alofi (Niue) (pop: 624) --> Voir les séismes à proximité!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 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.
MagnitudeProfondeurLocationSource
M 6.433 kmTonga (Samoa)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.
There are no user reports for this quake yet. If you felt it be the first to report it!
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Aftershocks of the 6.4 quake Tonga (Samoa) 8 January 1983 11:21 GMT

More info
Recorded aftershocks, latest first (16 quakes):
  • 29 Jun 1983 03:29 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    47 km (29 mi) distance
    | USGS | Details
  • 27 Jun 1983 02:16 UTC
    | M 4.3 |
    195.6 km (121.5 mi) depth
    |
    63 km (39 mi) distance
    | USGS | Details
  • 21 Jun 1983 11:36 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    10 km (6 mi) distance
    | USGS | Details
  • 18 Jun 1983 23:02 UTC
    | M 4.8 |
    33 km (20.5 mi) depth
    |
    27 km (17 mi) distance
    | USGS | Details
  • 15 Jun 1983 06:07 UTC
    | M 5.5 |
    33 km (20.5 mi) depth
    |
    37 km (23 mi) distance
    | USGS | Details
  • 05 Jun 1983 16:26 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    77 km (48 mi) distance
    | USGS | Details
  • 05 Jun 1983 13:23 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    86 km (53 mi) distance
    | USGS | Details
  • 01 Jun 1983 11:54 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    95 km (59 mi) distance
    | USGS | Details
  • 01 Jun 1983 10:58 UTC
    | M 6.1 |
    33 km (20.5 mi) depth
    |
    65 km (40 mi) distance
    | USGS | Strong mag. 6.1 earthquake - Samoa Islands Region on Wednesday, 1 June 1983 at 10:58 (GMT)
  • 28 Mar 1983 09:00 UTC
    | M 4.9 |
    19 km (11.8 mi) depth
    |
    51 km (32 mi) distance
    | USGS | Details
  • 15 Mar 1983 07:04 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    30 km (19 mi) distance
    | USGS | Details
  • 14 Mar 1983 16:37 UTC
    | M 4.6 |
    33 km (20.5 mi) depth
    |
    48 km (30 mi) distance
    | USGS | Details
  • 26 Jan 1983 18:55 UTC
    | M 5.4 |
    41 km (25.5 mi) depth
    |
    17 km (11 mi) distance
    | USGS | Details
  • 24 Jan 1983 04:28 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    50 km (31 mi) distance
    | USGS | Details
  • 19 Jan 1983 13:58 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    70 km (44 mi) distance
    | USGS | Details
  • 12 Jan 1983 09:58 UTC
    | M 4.9 |
    33 km (20.5 mi) depth
    |
    12 km (7 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

Strong mag. 6.4 earthquake - Tonga (Samoa) on Saturday, 8 January 1983 at 11:21 (GMT)
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