M4.5 earthquake 56 km WNW of Ninilchik, Alaska
A magnitude 4.5 earthquake struck 56 km WNW of Ninilchik, Alaska on Thu, Mar 30, 1978, 2:19 PM GMT-10 (00:19 UTC), 128 km (80 mi) below the surface.
A larger quake followed: M4.6 43 km E of Port Alsworth, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 1978-03-31 00:19:06 UTC
- Depth
- 128.0 km (79.5 mi), intermediate-depth
- Epicenter
- 60.329° N, 152.521° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Stations used
- 26
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.529 km WNW of Salamatof, Alaska · 17698 days ago · 101 km deep · 55 km away
- 3.54 km S of Kasilof, Alaska · 17692 days ago · 90 km deep · 69 km away
- 3.947 km WNW of Nanwalek, Alaska · 17691 days ago · 87 km deep · 93 km away
- 4.643 km E of Port Alsworth, Alaska · 17688 days ago · 158 km deep · 60 km away
- 4.18 km NW of Happy Valley, Alaska · 17686 days ago · 92 km deep · 53 km away
- 4.546 km NE of Pedro Bay, Alaska · 17682 days ago · 171 km deep · 60 km away
- 4.150 km NE of Pedro Bay, Alaska · 17648 days ago · 152 km deep · 57 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000tux. Read Tue, Sep 22, 2026, 7:44 AM UTC.