M6.3 earthquake 13 km E of Basco, Philippines
A magnitude 6.3 earthquake struck 13 km E of Basco, Philippines on Tue, Aug 2, 1983, 10:17 AM GMT+8 (02:17 UTC), 158 km (98 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.3 (mw), strong
- Local time
- UTC
- 1983-08-02 02:17:41 UTC
- Depth
- 157.9 km (98.1 mi), intermediate-depth
- Epicenter
- 20.435° N, 122.101° E
- Region
- Philippines
- Strongest shaking
- IV, light shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- IV, light shaking
- Peak ground acceleration
- 2.8% of gravity
- Peak ground velocity
- 0.6 cm/s
- Map
- Automatic
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
- CONSTRAINED_BY_DEPTH_PHASES
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 3.3 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.165 km N of Basco, Philippines · 15750 days ago · 33 km deep · 66 km away
- 4.763 km SW of Basco, Philippines · 15742 days ago · 67 km deep · 71 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001x9n (also filed as gcmtb080283a, gcmt19830802021740, iscgem569336). Read Sun, Sep 27, 2026, 7:52 AM UTC.