Very strong mag. 6.9 earthquake - Halmahera Sea, 17 km east of Pulau Katinai Besar Island, Maluku Utara, Indonesia, on Monday, 21 January 1985 at 00:55 (GMT)

Very strong mag. 6.9 earthquake - Halmahera Sea, 17 km east of Pulau Katinai Besar Island, Maluku Utara, Indonesia, on Monday, 21 January 1985 at 00:55 (GMT)

Tremblement de terre très fort magnitude 6.9 at 33 km depth

Date & time: 21 Jan 1985 00:55:22 UTC
Magnitude: 6.9
Profondeur: 33.0 km
Epicenter latitude / longitude: 0.953°S / 128.507°E (Halmahera Sea, Indonésie)
Volcan le plus près: Bibinoi (90 km / 56 mi)
Nearby towns and cities:
216 km SSE de Sofifi (Kota Tidore Kepulauan) (pop: 36,200) --> Voir les séismes à proximité!
231 km SSE de Ternate (pop: 101,700) --> Voir les séismes à proximité!
269 km N de Amahai (pop: 47,700) --> Voir les séismes à proximité!
303 km S de Tobelo (Kabupaten Halmahera Utara) (pop: 10,000) --> Voir les séismes à proximité!
306 km O de Sorong (pop: 125,500) --> Voir les séismes à proximité!
307 km N de Ambon City (pop: 355,600) --> Voir les séismes à proximité!
456 km SE de Bitung (pop: 137,400) --> Voir les séismes à proximité!
472 km ESE de Tondano (Kabupaten Minahasa) (pop: 33,300) --> Voir les séismes à proximité!
483 km ESE de Tomohon (pop: 27,600) --> Voir les séismes à proximité!
489 km ESE de Manado (pop: 451,900) --> Voir les séismes à proximité!
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.
MagnitudeProfondeurLocationSource
M 6.933 kmHalmahera, 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 (7 quakes):
  • 05 Jul 1985 07:17 UTC
    | M 4.8 |
    33 km (20.5 mi) depth
    |
    23 km (14 mi) distance
    | USGS | Details
  • 24 Feb 1985 19:17 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    167 km (104 mi) distance
    | USGS | Details
  • 25 Jan 1985 12:38 UTC
    | M 5.0 |
    63.7 km (39.6 mi) depth
    |
    11 km (7 mi) distance
    | USGS | Details
  • 21 Jan 1985 19:29 UTC
    | M 4.9 |
    33 km (20.5 mi) depth
    |
    4 km (3 mi) distance
    | USGS | Details
  • 21 Jan 1985 04:44 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    86 km (53 mi) distance
    | USGS | Details
  • 21 Jan 1985 04:41 UTC
    | M 5.4 |
    33 km (20.5 mi) depth
    |
    21 km (13 mi) distance
    | USGS | Details
  • 21 Jan 1985 04:25 UTC
    | M 4.1 |
    33 km (20.5 mi) depth
    |
    57 km (35 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

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