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M6.9 earthquake, Philippines, 1977-07-21

MagnitudeM6.9ms

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Depth33 km

Time (UTC)1977-07-21 13:45

Rank in 197713 / 85among M6+

Rank since 19001851 / 14,458

Energy vs an M6×22approx.

22 km SSW of Dicabisagan, Philippines · 16.88, 122.36

M6.5+ within 300 km (largest first)

1990 M7.7M7.7

1937 M7.6M7.6

1968 M7.6M7.6

1907 M7.5M7.5

1907 M7.4M7.4

1970 M7.4M7.4

1949 M7.2M7.2

1979 M7.1M7.1

1906 M7.1M7.1

1938 M7.1M7.1

1970 M7.0M7.0

1977 M7.0M7.0

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M7.0 1977-03-18	1977-03-18 21:43	37 km	34 km E of Dicamay, Philippines
M6.9 1972-05-22	1972-05-22 06:04	31 km	30 km ESE of Dicamay, Philippines
M6.2 1970-04-15	1970-04-15 13:14	26 km	59 km NNE of Casuguran, Philippines
M7.0 1970-04-12	1970-04-12 04:01	15 km	17 km N of Karligan, Philippines
M6.5 1970-04-08	1970-04-08 21:23	28 km	35 km E of Dingalan, Philippines
M7.4 1970-04-07	1970-04-07 05:34	31 km	14 km ENE of Suklayin, Philippines
M6.1 1970-01-05	1970-01-05 00:20	18 km	68 km N of Namuac, Philippines
M6.1 1968-11-22	1968-11-22 08:59	24 km	51 km SE of Minuri, Philippines
M6.4 1968-08-28	1968-08-28 20:42	18 km	56 km ESE of Suklayin, Philippines
M6.5 1968-08-03	1968-08-03 06:25	22 km	35 km SE of Dicamay, Philippines

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.