M5.6 earthquake 5 km N of Susitna, Alaska
A magnitude 5.6 earthquake struck 5 km N of Susitna, Alaska on Sun, Dec 29, 1974, 8:25 AM GMT-10 (18:25 UTC), 67 km (42 mi) below the surface.
A larger quake followed: M5.9 23 km NE of Willow, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.6 (mb), moderate
- Local time
- UTC
- 1974-12-29 18:25:00 UTC
- Depth
- 67.0 km (41.6 mi), shallow
- Epicenter
- 61.597° N, 150.511° W
- Region
- Alaska
- Strongest shaking
- IV, light shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- IV, light shaking
- Peak ground acceleration
- 4.3% of gravity
- Peak ground velocity
- 0.6 cm/s
- Map
- Automatic
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- CONSTRAINED_BY_DEPTH_PHASES
- Stations used
- 81
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 10 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.121 km SSE of Susitna North, Alaska · 18894 days ago · 62 km deep · 61 km away
- 5.923 km NE of Willow, Alaska · 18892 days ago · 66 km deep · 53 km away
- 3.87 km NW of Point MacKenzie, Alaska · 18892 days ago · 63 km deep · 32 km away
- 3.938 km SSW of Skwentna, Alaska · 18884 days ago · 126 km deep · 66 km away
- 4.812 km S of Susitna, Alaska · 18880 days ago · 66 km deep · 18 km away
- 3.824 km WNW of Susitna, Alaska · 18876 days ago · 70 km deep · 21 km away
- 3.014 km NNE of Houston, Alaska · 18867 days ago · 28 km deep · 46 km away
- 3.98 km NE of Anchorage, Alaska · 18866 days ago · 46 km deep · 52 km away
- 3.70 km SSE of Point MacKenzie, Alaska · 18865 days ago · 42 km deep · 40 km away
- 2.913 km NW of Susitna, Alaska · 18835 days ago · 35 km deep · 9 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00009a2 (also filed as ushis3307, iscgem734885). Read Tue, Sep 22, 2026, 10:57 AM UTC.