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M7.7 earthquake, Papua New Guinea, 1975-07-20

MagnitudeM7.7ms

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Depth44 km

Time (UTC)1975-07-20 19:54

Rank in 19756 / 106among M6+

Rank since 1900261 / 14,458

Energy vs an M6×355approx.

94 km SSW of Panguna, Papua New Guinea · -7.10, 155.15

M6.5+ within 300 km (largest first)

1919 M8.2M8.2

2007 M8.1M8.1

1971 M8.0M8.0

1975 M7.9M7.9

2017 M7.9M7.9

1939 M7.8M7.8

1995 M7.7M7.7

1975 M7.7M7.7

1946 M7.7M7.7

1972 M7.5M7.5

2014 M7.5M7.5

1968 M7.3M7.3

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M7.9 1975-07-20	1975-07-20 14:37	49 km	56 km WSW of Panguna, Papua New Guinea
M6.1 1974-11-27	1974-11-27 18:45	49 km	148 km W of Panguna, Papua New Guinea
M7.2 1974-10-23	1974-10-23 06:14	48 km	282 km SW of Panguna, Papua New Guinea
M6.6 1974-03-09	1974-03-09 20:18	33 km	111 km NW of Gizo, Solomon Islands
M6.5 1974-03-09	1974-03-09 20:14	50 km	100 km NW of Gizo, Solomon Islands
M7.1 1974-02-01	1974-02-01 03:12	40 km	118 km S of Panguna, Papua New Guinea
M6.2 1974-01-31	1974-01-31 23:38	62 km	102 km SSE of Panguna, Papua New Guinea
M7.0 1974-01-31	1974-01-31 23:30	34 km	126 km NW of Gizo, Solomon Islands
M6.5 1972-11-21	1972-11-21 03:59	15 km	144 km W of Panguna, Papua New Guinea
M6.1 1972-10-30	1972-10-30 16:48	49 km	74 km W of Panguna, Papua New Guinea

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.