Strong mag. 6.3 earthquake - South Pacific Ocean, 231 km southwest of Nuku\'alofa, Tongatapu, on Tuesday, 23 March 1971 at 02:15 (GMT)
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Strong magnitude 6.3 earthquake at 73 km depth
Date & time: 23 Mar 1971 02:15:27 UTC
Depth: 72.6 km
Epicenter latitude / longitude: 23.024°S / 176.147°W (South Pacific Ocean, Tonga)
Nearest volcano: Ata Volcanic Complex (77 km / 48 mi)
Nearby towns and cities:
225 km (140 mi) SSW of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
231 km (144 mi) SSW of Nuku'alofa (pop: 22,400) --> See nearby quakes!
231 km (144 mi) SSW of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
238 km (148 mi) SSW of Kolonga (pop: 1,100) --> See nearby quakes!
402 km (250 mi) SSW of Pangai (pop: 1,740) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 atomic bombs!) More info
Data for the same earthquake reported by different agencies
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|M 6.3||73 km||south of the Fiji Islands (Tonga)||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.