Earthquake details

Wednesday, February 23, 1977 Earthquake

The earthquake hit Guam on Wednesday, February 23, 1977 at 18:03 UTC with a magnitude of 5.1. The closest known location in the current dataset is Dededo Village (Guam - GU), about 227.2 km away. The epicenter is located at longitude 143.547 and latitude 11.913.

Magnitude	5.1
Alert	Strong
Depth	33.0 km
Coordinates	11.913, 143.547
UTC time	1977-02-23 18:03:09.100

Location	Dededo Village
Country	Guam (GU)
Severity	Strong

Earthquake map 1977-02-23

Closest countries

The 12 closest cities near the epicenter.

Dededo Village	227.2 km
Saipan	438.1 km
Jayapura	1638.4 km
Abepura	1647.1 km
Manokwari	1766.9 km
Wamena	1853.4 km
Nabire	1919.3 km
Tandag	1924.5 km
Bislig	1932.3 km
Sorong	1968.0 km
Monkayo	1971.3 km
Compostela	1971.7 km

Nearby earthquakes

The latest 8 earthquakes within 100 km of this epicenter.

M 4.5 Dededo Village Guam · 2026-04-12 19:43 UTC	317.4 km
M 4.1 Dededo Village Guam · 2026-04-09 18:06 UTC	256.3 km
M 4.5 Dededo Village Guam · 2026-03-29 15:06 UTC	271.7 km
M 4.3 Dededo Village Guam · 2026-03-29 06:36 UTC	287.6 km
M 4.1 Dededo Village Guam · 2026-03-21 11:23 UTC	248.1 km
M 4.5 Dededo Village Guam · 2026-02-27 03:57 UTC	234.3 km
M 4.3 Dededo Village Guam · 2026-02-15 02:20 UTC	266.2 km
M 4.1 Dededo Village Guam · 2026-02-13 01:20 UTC	250.2 km

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