Strong mag. 6.5 earthquake - Tonga on Wednesday, 24 September 1975 at 01:47 (GMT)
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Strong magnitude 6.5 earthquake at 33 km depth
Depth: 33.0 km
Epicenter latitude / longitude: 20.535°S / 173.994°W (Tonga)
Nearest volcano: Feinga Seamount (129 km / 80 mi)
Nearby towns and cities:
142 km (88 mi) ENE of Nuku'alofa (pop: 22,400) --> 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||33 km||Tonga||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 6.5 quake Tonga 24 September 1975 01:47 GMT
More infoRecorded aftershocks, latest first (2 quakes):
- 27 Dec 1975 11:53 UTC| M 5.1 |37 km (23 mi) depth|107 km (66 mi) distance| USGS | Details
- 02 Oct 1975 03:40 UTC| M 4.5 |33 km (20.5 mi) depth|19 km (12 mi) distance| USGS | Details