Strong mag. 6.6 earthquake - Halmahera, Indonesia, on Wednesday, 7 April 1971 at 04:59 (GMT)
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Strong magnitude 6.6 earthquake at 31 km depth
Depth: 31.3 km
Epicenter latitude / longitude: 2.514°N / 129.106°E (Indonesia)
Nearest volcano: Tarakan (161 km / 100 mi)
Nearby towns and cities:
150 km (93 mi) NE of Tobelo (Kabupaten Halmahera Utara) (pop: 10,000) --> See nearby quakes!
262 km (163 mi) NE of Sofifi (Kota Tidore Kepulauan) (pop: 36,200) --> See nearby quakes!
271 km (168 mi) NE of Ternate (pop: 101,700) --> See nearby quakes!
447 km (278 mi) NNW of Sorong (pop: 125,500) --> See nearby quakes!
451 km (280 mi) ENE of Bitung (pop: 137,400) --> See nearby quakes!
582 km (361 mi) SE of Alabel (Philippines) (pop: 43,300) --> See nearby quakes!
582 km (361 mi) SE of Malita (Philippines) (pop: 41,100) --> See nearby quakes!
592 km (368 mi) SE of General Santos (Philippines) (pop: 679,600) --> See nearby quakes!
596 km (370 mi) SE of Maluñgun (Philippines) (pop: 52,200) --> See nearby quakes!
2656 km (1650 mi) ENE of Jakarta (pop: 8,540,100) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 atomic bombs!) More info
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.
|M 6.6||31 km||Halmahera, Indonesia||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Aftershocks of the 6.6 quake Halmahera, Indonesia, 7 April 1971 04:59 GMT
More infoRecorded aftershocks, latest first (2 quakes):
- 14 Jul 1971 23:00 UTC| M 5.6 |40 km (24.9 mi) depth|13 km (8 mi) distance| USGS | Details
- 19 May 1971 11:06 UTC| M 5.5 |30 km (18.6 mi) depth|24 km (15 mi) distance| USGS | Details