Moderate mag. 5.1 earthquake - Philippines Sea, 63 km north of Gura Tabailenge Island, Maluku Utara, Indonesia, on Wednesday, 29 July 1987 at 21:15 (GMT)

Moderate mag. 5.1 earthquake - Philippines Sea, 63 km north of Gura Tabailenge Island, Maluku Utara, Indonesia, on Wednesday, 29 July 1987 at 21:15 (GMT)

Moderate magnitude 5.1 earthquake at 213 km depth

Date & time: 29 Jul 1987 21:15:00 UTC
Magnitude: 5.1
Depth: 213.1 km
Epicenter latitude / longitude: 2.945°N / 128.612°E (Philippines Sea, Indonesia)
Nearest volcano: Tarakan (151 km / 94 mi)
Nearby towns and cities:
151 km (94 mi) NNE of Tobelo (Kabupaten Halmahera Utara) (pop: 10,000) --> See nearby quakes!
272 km (169 mi) NNE of Sofifi (Kota Tidore Kepulauan) (pop: 36,200) --> See nearby quakes!
276 km (171 mi) NNE of Ternate (pop: 101,700) --> See nearby quakes!
415 km (258 mi) ENE of Bitung (pop: 137,400) --> See nearby quakes!
449 km (279 mi) ENE of Manado (pop: 451,900) --> See nearby quakes!
450 km (279 mi) ENE of Tondano (Kabupaten Minahasa) (pop: 33,300) --> See nearby quakes!
460 km (286 mi) ENE of Tomohon (pop: 27,600) --> See nearby quakes!
517 km (322 mi) NW of Sorong (pop: 125,500) --> See nearby quakes!
519 km (322 mi) SSE of Mati (Philippines) (pop: 105,900) --> See nearby quakes!
519 km (323 mi) SE of General Santos City (Philippines) (pop: 679,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.8 x 1012 joules (783 megawatt hours, equivalent to 674 tons of TNT) 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.
5.1213 kmHalmahera, IndonesiaUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

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More info
Recorded aftershocks, latest first (2 quakes):
  • 14 Aug 1987 21:36 UTC
    | M 4.5 |
    33 km (20.5 mi) depth
    20 km (12 mi) distance
    | USGS | Details
  • 04 Aug 1987 19:13 UTC
    | M 4.5 |
    228.5 km (142 mi) depth
    16 km (10 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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