Strong mag. 6.1 earthquake - South of Tonga on Saturday, 27 April 1974
Depth: 45.0 km
Epicenter latitude / longitude: 26.246°S / 175.912°W (international territory)
Nearest volcano: Monowai (134 km / 83 mi)
Primary data source: USGS
Estimated released energy: 8.9 x 1013 joules (24.8 gigawatt hours, equivalent to 21301 tons of TNT or 1.3 atomic bombs!) [learn more]
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.
|Time||Mag. / Depth||Location||Source|
|Sat, 27 Apr 07:24 UTC||M 6.1 / 45 km||South of 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 6.1 quake: South of Tonga, 27 Apr 1974 07:24
More infoRecorded aftershocks, latest first (1 quakes):
- 01 May 1974 04:57 UTC| M 5.0 |44 km (27.3 mi) depth|33 km (20 mi) distance| USGS | Details