Strong mag. 6.9 earthquake - Halmahera, Indonesia, on Monday, 21 January 1985 at 00:55 (GMT)

Strong mag. 6.9 earthquake  - Halmahera, Indonesia, on Monday, 21 January 1985 at 00:55 (GMT)

Strong magnitude 6.9 earthquake at 33 km depth

Date & time: 21 Jan 1985 00:55:22 UTC
Magnitude: 6.9
Depth: 33.0 km
Epicenter latitude / longitude: 0.953°S / 128.507°E (Indonesia)
Nearest volcano: Bibinoi (90 km / 56 mi)
Nearby towns and cities:
216 km (134 mi) SSE of Sofifi (Kota Tidore Kepulauan) (pop: 36,200) --> See nearby quakes!
231 km (143 mi) SSE of Ternate (pop: 101,700) --> See nearby quakes!
269 km (167 mi) N of Amahai (pop: 47,700) --> See nearby quakes!
306 km (190 mi) W of Sorong (pop: 125,500) --> See nearby quakes!
307 km (191 mi) N of Ambon City (pop: 355,600) --> See nearby quakes!
456 km (283 mi) SE of Bitung (pop: 137,400) --> See nearby quakes!
472 km (293 mi) ESE of Tondano (Kabupaten Minahasa) (pop: 33,300) --> See nearby quakes!
483 km (300 mi) ESE of Tomohon (pop: 27,600) --> See nearby quakes!
489 km (304 mi) ESE of Manado (pop: 451,900) --> See nearby quakes!
2474 km (1537 mi) ENE of Jakarta (pop: 8,540,100) --> 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 6.933 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 of the 6.9 quake Halmahera, Indonesia, 21 January 1985 00:55 GMT

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

Earlier earthquakes in the same area

Strong mag. 6.9 earthquake - Halmahera, Indonesia, on Monday, 21 January 1985 at 00:55 (GMT)
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