Strong mag. 5.8 earthquake - South Pacific Ocean, 238 km southwest of Apia, Tuamasaga, Samoa, on Thursday, 27 July 1978 at 18:25 (GMT)

Strong mag. 5.8 earthquake - South Pacific Ocean, 238 km southwest of Apia, Tuamasaga, Samoa, on Thursday, 27 July 1978 at 18:25 (GMT)

Tremblement de terre fort magnitude 5.8 at 33 km depth

Date & time: 27 Jul 1978 18:25:08 UTC
Magnitude: 5.8
Profondeur: 33.0 km
Epicenter latitude / longitude: 15.584°S / 173.043°W (South Pacific Ocean, Samoa)
Volcan le plus près: Curacoa (67 km / 42 mi)
Nearby towns and cities:
218 km SSO de Vailoa (pop: 769) --> Voir les séismes à proximité!
223 km SSO de Mulifanua (pop: 4,510) --> Voir les séismes à proximité!
234 km S de Asau (pop: 6,640) --> Voir les séismes à proximité!
236 km SSO de Afega (Malie) (pop: 1,900) --> Voir les séismes à proximité!
238 km SO de Apia (pop: 40,400) --> Voir les séismes à proximité!
246 km SO de Lufilufi (pop: 1,070) --> Voir les séismes à proximité!
247 km SSO de Safotu (pop: 1,210) --> Voir les séismes à proximité!
290 km OSO de Pago Pago (Ma'Oputasi, Samoa américaines) (pop: 11,500) --> Voir les séismes à proximité!
423 km SE de Mata-Utu (Hahake, Wallis-et-Futuna) (pop: 1,200) --> Voir les séismes à proximité!
509 km NO de Alofi (Niue) (pop: 624) --> Voir les séismes à proximité!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.2 x 1013 joules (8.78 gigawatt hours, equivalent to 7558 tons of TNT or 0.5 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.
MagnitudeProfondeurLocationSource
M 5.833 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

More info
Recorded aftershocks, latest first (5 quakes):
  • 22 Sep 1978 14:32 UTC
    | M 4.7 |
    47 km (29.2 mi) depth
    |
    17 km (11 mi) distance
    | USGS | Details
  • 11 Sep 1978 06:05 UTC
    | M 4.8 |
    33 km (20.5 mi) depth
    |
    47 km (29 mi) distance
    | USGS | Details
  • 06 Sep 1978 23:26 UTC
    | M 5.4 |
    33 km (20.5 mi) depth
    |
    40 km (25 mi) distance
    | USGS | Details
  • 04 Aug 1978 01:17 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details
  • 01 Aug 1978 20:29 UTC
    | M 5.5 |
    33 km (20.5 mi) depth
    |
    45 km (28 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

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