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M7.0 earthquake, Alaska, 1928-06-21

MagnitudeM7.0mw

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Depth15 km

Time (UTC)1928-06-21 16:27

Rank in 192818 / 119among M6+

Rank since 19001427 / 14,458

Energy vs an M6×32approx.

52 km NE of Chenega, Alaska · 60.37, -147.29

M6.5+ within 300 km (largest first)

1964 M9.2M9.2

2018 M7.1M7.1

1906 M7.0M7.0

1928 M7.0M7.0

1943 M6.9M6.9

1933 M6.8M6.8

1936 M6.8M6.8

1934 M6.8M6.8

1954 M6.8M6.8

1934 M6.7M6.7

1970 M6.7M6.7

1912 M6.7M6.7

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.6 1925-02-23	1925-02-23 23:53	25 km	57 km ENE of Whittier, Alaska
M6.4 1916-02-15	1916-02-15 11:35	25 km	Prince William Sound, Alaska
M6.7 1912-01-31	1912-01-31 20:11	25 km	Prince William Sound, Alaska
M6.3 1911-09-22	1911-09-22 05:01	25 km	27 km ENE of Whittier, Alaska
M6.0 1908-02-14	1908-02-14 11:25	–	Near Valdez, Alaska
M7.0 1906-12-23	1906-12-23 17:21	15 km	153 km SE of Halibut Cove, Alaska

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.