Strong mag. 5.4 earthquake - South Pacific Ocean, 173 km east of Nuku\'alofa, Tongatapu, on Sunday, 4 December 1983 at 19:30 (GMT)
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Strong magnitude 5.4 earthquake at 33 km depth
Date & time: 4 Dec 1983 19:30:40 UTC
Depth: 33.0 km
Epicenter latitude / longitude: 20.742°S / 173.592°W (South Pacific Ocean, Tonga)
Nearest volcano: Feinga Seamount (176 km / 109 mi)
Nearby towns and cities:
130 km (81 mi) SE of Pangai (pop: 1,740) --> See nearby quakes!
156 km (97 mi) ENE of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
159 km (99 mi) ENE of Kolonga (pop: 1,100) --> See nearby quakes!
173 km (107 mi) ENE of Nuku'alofa (pop: 22,400) --> See nearby quakes!
173 km (107 mi) ENE of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
236 km (147 mi) S of Neiafu (pop: 4,320) --> See nearby quakes!
428 km (266 mi) WSW of Alofi (Niue) (pop: 624) --> See nearby quakes!
431 km (268 mi) WSW of Hakupu (Niue) (pop: 221) --> See nearby quakes!
441 km (274 mi) WSW of Mutalau (Niue) (pop: 133) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 7.9 x 1012 joules (2.21 gigawatt hours, equivalent to 1898 tons of TNT or 0.1 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 5.4||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.