1977 Tonga earthquake

1977 Tonga earthquake
1977 Tonga earthquake is located in Oceania
1977 Tonga earthquake
UTC time1977-06-22 12:08:33
ISC event697569
USGS-ANSSComCat
Local date23 June 1977 (1977-06-23)
Local time01:08:33
Magnitude8.0 Mw[1]
Depth55 km (34 mi)[1]
Epicenter22°53′S 175°43′W / 22.89°S 175.71°W / -22.89; -175.71[1]
TypeNormal[2]
Max. intensityMMI VIII (Severe)[3]
Casualtiesyes

The 1977 Tonga earthquake took place on 23 June at 01:08:33 local time some 200 km southwest of Tongatapu, with shocks affecting 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.

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]

See also

References

  1. ^ a b c ISC (2017), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2013), Version 4.0, International Seismological Centre
  2. ^ PAGER-CAT Earthquake Catalog, Version 2008_06.1, United States Geological Survey, September 4, 2009
  3. ^ a b "Earthquakes in Tonga". iisee.kenken.go.jp. Retrieved 10 September 2017.
  4. ^ M. D. Campbell; G. R. McKay; R. L. Williams (1977). "The Tonga earthquake of 23 June, 1977 – some initial observations" (PDF). Bulletin of the New Zealand National Society for Earthquake Engineering. 10 (4): 208–218. doi:10.5459/bnzsee.10.4.208-218.

Further reading


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