M4.9 earthquake 10 km E of Union, Philippines
A magnitude 4.9 earthquake struck 10 km E of Union, Philippines on Tue, Feb 21, 1984, 9:46 AM GMT+8 (01:46 UTC), 63 km (39 mi) below the surface.
A larger quake followed: M5.1 22 km E of Cortes, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1984-02-21 01:46:12 UTC
- Depth
- 63.3 km (39.3 mi), shallow
- Epicenter
- 9.766° N, 126.202° 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 1.9 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.122 km E of Cortes, Philippines · 15557 days ago · 69 km deep · 59 km away
- 4.9Philippine Islands region · 15522 days ago · 70 km deep · 55 km away
- 4.95 km ENE of Del Pilar, Philippines · 15509 days ago · 51 km deep · 91 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002250. Read Sun, Sep 27, 2026, 7:10 PM UTC.