Strong mag. 6.6 earthquake - South of Tonga on Friday, 28 September 1984 at 00:03 (GMT)
Strong magnitude 6.6 earthquake at 21 km depth
Profondeur: 21.1 km
Epicenter latitude / longitude: 25.849°S / 175.911°W (international territory)
Volcan le plus près: Monowai (128 km / 80 mi)
Nearby towns and cities:
420 km NNE de Napier Island --> Voir les séismes à proximité!
429 km NNE de Sunday Island --> Voir les séismes à proximité!
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||21 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 6.6 quake South of Tonga 28 September 1984 00:03 GMT
More infoRecorded aftershocks, latest first (1 quakes):
- 14 Dec 1984 06:11 UTC| M 4.8 |33 km (20.5 mi) depth|110 km (69 mi) distance| USGS | Details