M4.4 earthquake 149 km SSE of Chignik, Alaska
A magnitude 4.4 earthquake struck 149 km SSE of Chignik, Alaska on Sat, Sep 9, 2017, 11:22 AM AKDT (19:22 UTC), 37 km (23 mi) below the surface.
A larger quake followed: M4.6 147 km SE of Chignik, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (ML, local (Richter)), light
- Magnitude from
- Alaska Earthquake Center
- Local time
- UTC
- 2017-09-09 19:22:47 UTC
- Depth
- 36.8 km (22.9 mi), shallow
- Epicenter
- 55.170° N, 157.112° 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 |
|---|---|---|---|
| 4.4 | ML, local (Richter) | Alaska Earthquake Center | Preferred · Preliminary |
| 4.4 | Mwr, regional moment | USGS National Earthquake Information Center | Reviewed · ±0.041 · 58 stations |
Did you feel it?
No one has reported feeling this quake to the USGS.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Strike-slip
- Moment magnitude
- 4.4 Mwr
- Nodal plane 1
- Strike 136°, dip 37°, rake -16°
- Nodal plane 2
- Strike 239°, dip 81°, rake -126°
How well it is located
Reviewed by a seismologist.
- Stations used
- 124
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 4 in the 30 days before it.
After
- 2.357 km SE of Perryville, Alaska · 3311 days ago · 31 km deep · 95 km away
- 3.067 km SE of Perryville, Alaska · 3311 days ago · 25 km deep · 92 km away
- 2.3163 km SE of Chignik, Alaska · 3309 days ago · 12 km deep · 19 km away
- 4.6147 km SE of Chignik, Alaska · 3308 days ago · 8 km deep · 5 km away
- 4.1149 km SSE of Chignik, Alaska · 3308 days ago · 23 km deep · 1 km away
- 3.495 km ESE of Chignik, Alaska · 3305 days ago · 45 km deep · 93 km away
- 2.9Alaska Peninsula · 3298 days ago · 8 km deep · 88 km away
- 3.2215 km SE of Perryville, Alaska · 3286 days ago · 12 km deep · 75 km away
- 4.0south of Alaska · 3284 days ago · 12 km deep · 82 km away
- 4.0215 km SE of Perryville, Alaska · 3284 days ago · 10 km deep · 73 km away
- 2.170 km SE of Chignik, Alaska · 3258 days ago · 16 km deep · 84 km away
- 2.488 km SSE of Perryville, Alaska · 3257 days ago · 25 km deep · 84 km away
- 1.971 km SE of Perryville, Alaska · 3256 days ago · 28 km deep · 88 km away
- 2.572 km SE of Perryville, Alaska · 3254 days ago · 14 km deep · 88 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ak017bl2vicr (also filed as ak16791201, us2000aizy). Read Sat, Oct 3, 2026, 3:01 PM UTC.