M4.3 earthquake 118 km N of Basco, Philippines
A magnitude 4.3 earthquake struck 118 km N of Basco, Philippines on Tue, May 22, 1984, 7:45 AM GMT+8 (23:45 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.0 180 km E of Hengchun, Taiwan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 1984-05-21 23:45:42 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 21.514° N, 122.088° 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 1.5 and up: 2 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 usp00024j5. Read Sun, Sep 27, 2026, 2:08 PM UTC.