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M7.1 earthquake, Tonga, 1957-04-14

MagnitudeM7.1mw

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Depth20 km

Time (UTC)1957-04-14 19:18

Rank in 195717 / 175among M6+

Rank since 19001287 / 14,458

Energy vs an M6×42approx.

112 km NNE of Hihifo, Tonga · -15.02, -173.38

M6.5+ within 300 km (largest first)

2009 M8.1M8.1

1917 M8.0M8.0

1975 M7.8M7.8

1981 M7.7M7.7

1977 M7.6M7.6

2023 M7.6M7.6

1995 M7.4M7.4

1984 M7.2M7.2

2000 M7.2M7.2

1957 M7.1M7.1

1978 M7.0M7.0

1913 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.3 1956-05-22	1956-05-22 03:01	45 km	90 km NE of Hihifo, Tonga
M6.5 1956-03-03	1956-03-03 00:05	35 km	92 km N of Hihifo, Tonga
M6.1 1955-11-10	1955-11-10 01:44	65 km	56 km N of Hihifo, Tonga
M6.0 1955-03-10	1955-03-10 21:10	15 km	119 km NE of Hihifo, Tonga
M6.1 1954-07-15	1954-07-15 00:03	15 km	182 km WNW of Hihifo, Tonga
M6.3 1952-10-10	1952-10-10 15:55	25 km	213 km WNW of Hihifo, Tonga
M6.6 1952-06-19	1952-06-19 20:57	15 km	103 km SW of Gataivai, Samoa
M6.5 1952-02-25	1952-02-25 01:17	42 km	124 km SSE of Hihifo, Tonga
M6.1 1951-11-19	1951-11-19 21:03	15 km	230 km ESE of Hihifo, Tonga
M6.1 1951-09-17	1951-09-17 11:57	10 km	213 km SE of Hihifo, 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.