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M6.5 earthquake, Papua New Guinea, 1971-08-23

MagnitudeM6.5mw

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Depth10 km

Time (UTC)1971-08-23 04:08

Rank in 197144 / 143among M6+

Rank since 19004097 / 14,458

Energy vs an M6×6approx.

134 km N of Madang, Papua New Guinea · -4.01, 145.84

M6.5+ within 300 km (largest first)

1906 M8.0M8.0

2022 M7.6M7.6

1918 M7.6M7.6

1907 M7.3M7.3

1992 M7.2M7.2

1997 M7.2M7.2

1986 M7.2M7.2

1906 M7.1M7.1

1989 M7.1M7.1

1900 M7.1M7.1

1909 M7.1M7.1

1925 M7.0M7.0

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.6 1971-03-13	1971-03-13 19:12	110 km	37 km N of Goroka, Papua New Guinea
M6.3 1970-11-12	1970-11-12 06:07	24 km	59 km W of Madang, Papua New Guinea
M6.9 1970-10-31	1970-10-31 17:53	60 km	49 km WNW of Madang, Papua New Guinea
M6.7 1968-12-07	1968-12-07 04:57	15 km	195 km N of Madang, Papua New Guinea
M7.0 1968-10-23	1968-10-23 21:04	13 km	42 km WNW of Wewak, Papua New Guinea
M6.5 1968-09-27	1968-09-27 19:06	11 km	23 km WSW of Wewak, Papua New Guinea
M6.3 1966-12-14	1966-12-14 21:07	65 km	72 km NNE of Wabag, Papua New Guinea
M6.3 1966-12-10	1966-12-10 18:08	19 km	185 km ENE of Angoram, Papua New Guinea
M6.3 1965-12-07	1965-12-07 22:19	122 km	51 km ESE of Kainantu, Papua New Guinea
M6.6 1964-09-12	1964-09-12 12:43	109 km	44 km S of Angoram, 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.