Strong mag. 6.3 earthquake - Tonga on Thursday, 8 October 1987 at 03:20 (GMT)
Quake Data | Interactive map | User Reports | Aftershocks | Earlier quakes in same area | Quakes in Tonga | Tongatapu
Strong magnitude 6.3 earthquake at 40 km depth
Depth: 40.4 km
Epicenter latitude / longitude: 19.599°S / 173.111°W (Tonga)
Nearest volcano: Late (184 km / 114 mi)
Nearby towns and cities:
277 km (172 mi) NE of Nuku'alofa (pop: 22,400) --> 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
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 6.3||40 km||Tonga||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
be the first to report it!There are no user reports for this quake yet. If you felt it
Aftershocks of the 6.3 quake Tonga 8 October 1987 03:20 GMT
More infoRecorded aftershocks, latest first (2 quakes):
- 30 Oct 1987 07:49 UTC| M 4.4 |33 km (20.5 mi) depth|68 km (42 mi) distance| USGS | Details
- 22 Oct 1987 13:10 UTC| M 5.3 |33 km (20.5 mi) depth|81 km (50 mi) distance| USGS | Details