1977 Tonga earthquake
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The 1977 Tonga earthquake took place on 22 June at 12:08:33 UTC some 200 km southwest of Tongatapu, which shocks infecting all islands of the kingdom of Tonga. The earthquake measured 8.0 on the moment magnitude scale and had a maximum intensity of VIII (Severe) on the Mercalli intensity scale.
Quick Facts UTC time, ISC event ...
UTC time | 1977-06-22 12:08:33 |
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ISC event | 697569 |
USGS-ANSS | ComCat |
Local date | 23 June 1977 (1977-06-23) |
Local time | 01:08:33 |
Magnitude | 8.0 Mw [1] |
Depth | 55 km (34 mi) [1] |
Epicenter | 22.89°S 175.71°W / -22.89; -175.71 [1] |
Type | Normal[2] |
Max. intensity | MMI VIII (Severe)[3] |
Casualties | yes |
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The earthquake caused considerable damage to the infrastructures and some fatalities in most Tongan islands,[3] with the most damage in Tongatapu and ʻEua and the least damage in Ha'apai and Vava'u.[4]