M4.6 earthquake Samar, Philippines
A magnitude 4.6 earthquake struck in Samar, Philippines on Tue, Mar 1, 1977, 4:43 AM GMT+8 (20:43 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 33 km ENE of Sulat, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1977-02-28 20:43:10 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 11.139° N, 125.503° E
- Region
- Philippines
- 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.
- Depth from
- OPERATOR_ASSIGNED
- Stations used
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000ms0. Read Mon, Sep 21, 2026, 3:41 PM UTC.