M4.3 earthquake 154 km WNW of Nikolski, Alaska
A magnitude 4.3 earthquake struck 154 km WNW of Nikolski, Alaska on Sat, Dec 31, 2016, 9:32 PM HAST (07:32 UTC), 187 km (116 mi) below the surface.
A larger quake followed: M5.2 69 km WNW of Nikolski, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-01-01 07:32:58 UTC
- Depth
- 187.0 km (116.2 mi), intermediate-depth
- Epicenter
- 53.438° N, 171.021° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 4.3 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.06 · 79 stations |
| 4.3 | mb, body-wave | Alaska Earthquake Center | Preliminary |
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 7.3 km horizontally, 8.9 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 116°
- Stations used
- 93
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.988 km W of Nikolski, Alaska · 3562 days ago · 77 km deep · 71 km away
- 5.269 km WNW of Nikolski, Alaska · 3554 days ago · 81 km deep · 86 km away · tsunami flag
- 3.9131 km WSW of Nikolski, Alaska · 3542 days ago · 110 km deep · 99 km away
- 3.077 km W of Nikolski, Alaska · 3516 days ago · 217 km deep · 82 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10007p28 (also filed as ak14872138, ak0171rwd75). Read Sat, Oct 3, 2026, 4:31 PM UTC.