Very strong mag. 6.5 earthquake - South Pacific Ocean, 239 km south of Nuku\'alofa, Tongatapu, on Thursday, 9 July 1964 at 11:22 (GMT)
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Very strong magnitude 6.5 earthquake at 20 km depth
Date & time: 9 Jul 1964 11:22:04 UTC
Depth: 20.0 km
Epicenter latitude / longitude: 23.277°S / 175.429°W (South Pacific Ocean, Tonga)
Nearest volcano: Ata Volcanic Complex (132 km / 82 mi)
Nearby towns and cities:
222 km (138 mi) SSW of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
239 km (148 mi) S of Nuku'alofa (pop: 22,400) --> See nearby quakes!
239 km (148 mi) S of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
241 km (150 mi) S of Kolonga (pop: 1,100) --> See nearby quakes!
401 km (249 mi) SSW of Pangai (pop: 1,740) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 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 6.5||20 km||Tonga region||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.