M3.9 earthquake 141 km N of Pagudpud, Philippines
A magnitude 3.9 earthquake struck 141 km N of Pagudpud, Philippines on Sat, Jul 21, 1973, 9:09 PM GMT+8 (13:09 UTC), 70 km (43 mi) below the surface.
A larger quake followed: M5.1 106 km NNE of Namuac, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mb), minor
- Local time
- UTC
- 1973-07-21 13:09:08 UTC
- Depth
- 70.0 km (43.5 mi), intermediate-depth
- Epicenter
- 19.836° N, 120.711° 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.
- Stations used
- 12
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 3 in the 30 days before it.
After
- 5.1106 km NNE of Namuac, Philippines · 19386 days ago · 44 km deep · 98 km away
- 4.759 km N of Namuac, Philippines · 19366 days ago · 58 km deep · 96 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00002sy. Read Tue, Sep 22, 2026, 9:33 PM UTC.