M4.6 earthquake 93 km SW of Basco, Philippines
A magnitude 4.6 earthquake struck 93 km SW of Basco, Philippines on Tue, Apr 30, 1974, 3:22 PM GMT+8 (07:22 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.7 49 km W 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
- 1974-04-30 07:22:43 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 19.817° N, 121.378° 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
- Stations used
- 14
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000659. Read Wed, Sep 23, 2026, 3:31 AM UTC.