M4.2 earthquake 21 km W of Sangay, Philippines
A magnitude 4.2 earthquake struck 21 km W of Sangay, Philippines on Thu, Dec 21, 1978, 5:25 AM GMT+8 (21:25 UTC), 52 km (32 mi) below the surface.
A larger quake followed: M5.1 20 km E of Kulaman, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb), light
- Local time
- UTC
- 1978-12-20 21:25:56 UTC
- Depth
- 52.0 km (32.3 mi), shallow
- Epicenter
- 6.416° N, 123.850° 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.
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.120 km E of Kulaman, Philippines · 17407 days ago · 49 km deep · 46 km away
- 4.315 km W of Kapaya, Philippines · 17394 days ago · 33 km deep · 65 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000y0m. Read Wed, Sep 30, 2026, 7:50 PM UTC.