List of earthquakes in 1977

This is a list of earthquakes in 1977. Only earthquakes of magnitude 6 or above are included, unless they result in damage and/or casualties, or are notable for some other reason. All dates are listed according to UTC time. Maximum intensities are indicated on the Mercalli intensity scale. Major events took in Romania, Indonesia and Australia, Argentina and in Tonga Island in the year. No quakes had a magnitude of 9 or higher.

By death toll
Rank Death toll Injures Magnitude Location MMI Depth (km) Article Ref Date
1. 1.600 11.386 7.2 Vrancea IX 94 1977 Vrancea earthquake [1] 4 March
2. 180 1.100+ 8.3 Sumba IX 33 1977 Sumba earthquake [2] 19 August
3. 65 284 7.4 San Juan IX 17 1977 San Juan earthquake [3] 23 November

By magnitude
Rank Magnitude Location Article Ref Date
1. 8.3

Sumba

1977 Sumba earthquake [2] 19 August
2. 7.8 Tongatapu 1977 Tonga earthquake [4] 22 June
3. 7.4 San Juan 1977 San Juan earthquake [3] 23 November
4. 7.2 Vrancea 1977 Vrancea earthquake [1] 4 March

References
  1. "Vrancea Earthquake". Devastating Earthquakes.
  2. "1977 Sumba earthquake". BSSA.
  3. "San Juan earthquake" (PDF).
  4. "1977 Tonga earthquake" (PDF). EAO022.
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