| Magnitude | 5.6 |
| Alert | Strong |
| Depth | 33.0 km |
| Coordinates | 51.250, 178.348 |
| UTC time | 1991-10-23 23:59:44.200 |
Earthquake details
Wednesday, October 23, 1991 Earthquake
The earthquake hit Alaska on Wednesday, October 23, 1991 at 23:59 UTC with a magnitude of 5.6. The closest known location in the current dataset is Petropavlovsk-Kamchatskiy (Alaska - AL), about 1357.4 km away. The epicenter is located at longitude 178.348 and latitude 51.250.
| Location | Rat Islands, Aleutian Islands |
| Country | Alaska (AL) |
| Severity | Strong |
Earthquake map 1991-10-23
Closest countries
The 12 closest cities near the epicenter.
| Petropavlovsk-Kamchatskiy | 1357.4 km |
| Yelizovo | 1373.9 km |
| Magadan | 1951.6 km |
| Anchorage | 2224.4 km |
| Fairbanks | 2457.6 km |
| Nemuro | 2601.5 km |
| Yuzhno-Sakhalinsk | 2612.4 km |
| Korsakov | 2624.0 km |
| Abashiri | 2652.6 km |
| Kholmsk | 2656.0 km |
| Kitami | 2691.0 km |
| Sovetskaya Gavan' | 2698.1 km |
Nearby earthquakes
The latest 8 earthquakes within 100 km of this epicenter.
M 4.2
Rat Islands, Aleutian Islands
Alaska · 2026-10-19 16:27 UTC
29.9 km
M 4.5
Rat Islands, Aleutian Islands
Alaska · 2026-10-19 16:27 UTC
14.7 km
M 4.4
275 km W of Adak
Alaska · 2026-10-11 12:16 UTC
88.9 km
M 4.4
259 km WSW of Adak
Alaska · 2026-09-27 10:30 UTC
98.5 km
M 5.0
Rat Islands, Aleutian Islands
Alaska · 2026-09-27 07:48 UTC
78.7 km
M 4.6
Rat Islands, Aleutian Islands
Alaska · 2026-09-27 07:48 UTC
78.1 km
M 4.4
263 km WSW of Adak
Alaska · 2026-09-26 17:02 UTC
98.1 km
M 4.2
Rat Islands, Aleutian Islands
Alaska · 2026-08-20 02:45 UTC
41.8 km
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