M4.5 earthquake 106 km WSW of Basco, Philippines
A magnitude 4.5 earthquake struck 106 km WSW of Basco, Philippines on Wed, Sep 24, 1986, 4:13 AM GMT+8 (20:13 UTC), 48 km (30 mi) below the surface.
A larger quake followed: M4.8 93 km SW of Basco, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (ms), light
- Local time
- UTC
- 1986-09-23 20:13:34 UTC
- Depth
- 47.6 km (29.6 mi), shallow
- Epicenter
- 20.007° N, 121.063° 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 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.893 km SW of Basco, Philippines · 14588 days ago · 33 km deep · 25 km away
- 4.576 km N of Claveria, Philippines · 14568 days ago · 30 km deep · 78 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002yar. Read Wed, Sep 23, 2026, 3:50 AM UTC.