M4.6 earthquake 78 km SW of Basco, Philippines
A magnitude 4.6 earthquake struck 78 km SW of Basco, Philippines on Wed, Jun 8, 1983, 3:23 AM GMT+8 (19:23 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M6.3 13 km E 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
- 4.6 (mb), light
- Local time
- UTC
- 1983-06-07 19:23:24 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 19.898° N, 121.504° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.953 km SE of Basco, Philippines · 15793 days ago · 220 km deep · 96 km away
- 4.758 km N of Namuac, Philippines · 15775 days ago · 33 km deep · 90 km away
- 6.313 km E of Basco, Philippines · 15763 days ago · 158 km deep · 86 km away
- 4.567 km N of Namuac, Philippines · 15759 days ago · 33 km deep · 81 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001vyp. Read Sun, Sep 27, 2026, 10:36 PM UTC.