| 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
179 km SW of Nikolski
Alaska · 2026-04-11 10:08 UTC
|
45.8 km |
|
M 4.7
177 km E of Atka
Alaska · 2026-04-11 00:39 UTC
|
40.0 km |
|
M 4.2
197 km SW of Nikolski
Alaska · 2026-02-09 05:37 UTC
|
58.4 km |
|
M 4.2
133 km E of Atka
Alaska · 2026-01-12 22:28 UTC
|
66.2 km |
|
M 4.4
121 km E of Atka
Alaska · 2025-11-30 12:24 UTC
|
73.4 km |
|
M 4.3
185 km E of Atka
Alaska · 2025-11-09 14:20 UTC
|
3.8 km |
|
M 4.7
189 km WSW of Nikolski
Alaska · 2025-11-09 09:36 UTC
|
21.1 km |
|
M 4.5
185 km SW of Nikolski
Alaska · 2025-09-13 22:29 UTC
|
89.5 km |
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