Moderate mag. 5.3 earthquake - South Pacific Ocean, 140 km east of Nuku\'alofa, Tongatapu, on Wednesday, 28 December 1983 at 11:21 (GMT)
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Moderate magnitude 5.3 earthquake at 50 km depth
Date & time: 28 Dec 1983 11:21:39 UTC
Depth: 49.6 km
Epicenter latitude / longitude: 20.964°S / 173.871°W (South Pacific Ocean, Tonga)
Nearest volcano: Feinga Seamount (162 km / 101 mi)
Nearby towns and cities:
119 km (74 mi) ENE of ‘Ohonua (Ohonua) (pop: 1,240) --> See nearby quakes!
126 km (78 mi) E of Kolonga (pop: 1,100) --> See nearby quakes!
137 km (85 mi) SSE of Pangai (pop: 1,740) --> See nearby quakes!
140 km (87 mi) E of Nuku'alofa (pop: 22,400) --> See nearby quakes!
140 km (87 mi) E of Nuku‘alofa (pop: 22,400) --> See nearby quakes!
258 km (160 mi) S of Neiafu (pop: 4,320) --> See nearby quakes!
465 km (289 mi) WSW of Alofi (Niue) (pop: 624) --> See nearby quakes!
467 km (290 mi) WSW of Hakupu (Niue) (pop: 221) --> See nearby quakes!
478 km (297 mi) WSW of Mutalau (Niue) (pop: 133) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5.6 x 1012 joules (1.56 gigawatt hours, equivalent to 1344 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 5.3||50 km||Tonga||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.