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M6.6 earthquake, Tonga, 1987-03-19

MagnitudeM6.6mw

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Depth214 km

Time (UTC)1987-03-19 22:51

Rank in 198740 / 166among M6+

Rank since 19003505 / 14,458

Energy vs an M6×8approx.

127 km NW of Nuku‘alofa, Tonga · -20.40, -176.13

M6.5+ within 300 km (largest first)

2006 M8.0M8.0

1903 M8.0M8.0

1997 M7.8M7.8

1919 M7.8M7.8

1950 M7.8M7.8

1913 M7.8M7.8

1948 M7.5M7.5

2026 M7.5M7.5

1962 M7.5M7.5

1957 M7.4M7.4

1996 M7.4M7.4

1937 M7.3M7.3

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.5 1987-02-10	1987-02-10 00:59	394 km	297 km NW of Haveluloto, Tonga
M6.5 1987-01-09	1987-01-09 08:01	33 km	231 km NW of Nuku‘alofa, Tonga
M6.0 1986-12-30	1986-12-30 15:32	24 km	71 km SSE of Pangai, Tonga
M7.2 1986-10-30	1986-10-30 01:28	188 km	157 km WSW of Haveluloto, Tonga
M6.2 1986-08-18	1986-08-18 01:59	20 km	76 km SSE of Pangai, Tonga
M6.5 1986-06-28	1986-06-28 05:03	211 km	151 km NW of Nuku‘alofa, Tonga
M6.1 1985-12-25	1985-12-25 22:15	455 km	Fiji region
M6.3 1985-10-12	1985-10-12 02:12	155 km	133 km WSW of Haveluloto, Tonga
M6.1 1985-09-27	1985-09-27 10:10	33 km	99 km SSE of ‘Ohonua, Tonga
M6.0 1985-02-03	1985-02-03 04:50	56 km	85 km SSE of Pangai, Tonga

Energy ratio uses the rule that one magnitude unit is about 32 times the energy. Magnitudes and locations are USGS values and can differ from national agencies. Older records are less complete and less precise.