M4.7 earthquake 34 km NE of Basco, Philippines
A magnitude 4.7 earthquake struck 34 km NE of Basco, Philippines on Sun, Sep 28, 1986, 8:02 AM GMT+8 (00:02 UTC), 29 km (18 mi) below the surface.
A larger quake followed: M5.3 Batan Islands region, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1986-09-28 00:02:44 UTC
- Depth
- 29.0 km (18.0 mi), shallow
- Epicenter
- 20.643° N, 122.226° 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
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 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 usp0002yf7. Read Tue, Sep 22, 2026, 10:37 AM UTC.