| Magnitude | 5.3 |
| Alert | Strong |
| Depth | 67.0 km |
| Coordinates | 52.347, -171.440 |
| UTC time | 1977-10-21 19:09:47.200 |
Earthquake details
Friday, October 21, 1977 Earthquake
The earthquake hit Alaska on Friday, October 21, 1977 at 19:09 UTC with a magnitude of 5.3. The closest known location in the current dataset is Anchorage (Alaska - AL), about 1630.6 km away. The epicenter is located at longitude -171.440 and latitude 52.347.
| Location | 186 km WSW of Nikolski |
| Country | Alaska (AL) |
| Severity | Strong |
Earthquake map 1977-10-21
Closest countries
The 12 closest cities near the epicenter.
| Anchorage | 1630.6 km |
| Fairbanks | 1933.9 km |
| Petropavlovsk-Kamchatskiy | 2005.8 km |
| Yelizovo | 2019.6 km |
| Juneau | 2402.3 km |
| Magadan | 2447.3 km |
| Campbell River | 3178.8 km |
| Prince George | 3192.0 km |
| Yuzhno-Sakhalinsk | 3299.2 km |
| Nanaimo | 3303.0 km |
| Nemuro | 3310.2 km |
| Korsakov | 3313.1 km |
Nearby earthquakes
The latest 8 earthquakes within 100 km of this epicenter.
M 4.0
153 km SW of Nikolski
Alaska · 2026-06-30 16:21 UTC
77.0 km
M 4.8
174 km SW of Nikolski
Alaska · 2026-05-25 05:18 UTC
57.7 km
M 4.0
159 km SW of Nikolski
Alaska · 2026-05-23 16:28 UTC
94.2 km
M 4.4
171 km E of Atka
Alaska · 2026-05-22 20:10 UTC
22.5 km
M 4.4
167 km E of Atka
Alaska · 2026-05-22 12:46 UTC
22.4 km
M 5.6
172 km ENE of Atka
Alaska · 2026-05-22 12:16 UTC
27.6 km
M 5.2
173 km E of Atka
Alaska · 2026-05-18 21:37 UTC
16.1 km
M 4.9
168 km ENE of Atka
Alaska · 2026-05-18 21:37 UTC
32.4 km
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