Mag. 4.6 earthquake - Tonga on Saturday, 28 February 1981 at 11:22 (GMT)
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Light magnitude 4.6 earthquake at 245 km depth
Depth: 245.3 km
Epicenter latitude / longitude: 19.089°S / 175.804°W (Tonga)
Nearest volcano: Unnamed (98 km / 61 mi)
Nearby towns and cities:
172 km (107 mi) WNW of Pangai (pop: 1,740) --> See nearby quakes!
198 km (123 mi) WSW of Neiafu (pop: 4,320) --> See nearby quakes!
237 km (147 mi) NNW of Nuku'alofa (pop: 22,400) --> See nearby quakes!
237 km (147 mi) NNW of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
240 km (149 mi) NNW of Kolonga (pop: 1,100) --> See nearby quakes!
265 km (165 mi) NNW of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
409 km (254 mi) SSW of Hihifo (pop: 815) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5 x 1011 joules (139 megawatt hours, equivalent to 120 tons of TNT) 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 4.6||245 km||Tonga||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.