M5.9 earthquake 53 km SE of Basco, Philippines
A magnitude 5.9 earthquake struck 53 km SE of Basco, Philippines on Sun, Jul 3, 1983, 10:49 AM GMT+8 (02:49 UTC), 220 km (137 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
- 5.9 (mw), moderate
- Local time
- UTC
- 1983-07-03 02:49:27 UTC
- Depth
- 220.3 km (136.9 mi), intermediate-depth
- Epicenter
- 20.161° N, 122.379° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.9 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 6.313 km E of Basco, Philippines · 15762 days ago · 158 km deep · 42 km away
- 4.763 km SW of Basco, Philippines · 15742 days ago · 67 km deep · 81 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001whv (also filed as gcmtb070383a, gcmt19830703024926, iscgem571366). Read Sun, Sep 27, 2026, 5:44 AM UTC.