M4.5 earthquake 76 km ENE of Pilar, Philippines
A magnitude 4.5 earthquake struck 76 km ENE of Pilar, Philippines on Sun, Sep 23, 1973, 8:08 PM GMT+8 (12:08 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 81 km E of Union, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 1973-09-23 12:08:27 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 10.095° N, 126.755° 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
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.881 km E of Union, Philippines · 19357 days ago · 37 km deep · 31 km away
- 4.913 km E of Pilar, Philippines · 19357 days ago · 45 km deep · 64 km away
- 5.228 km ENE of Pilar, Philippines · 19357 days ago · 46 km deep · 48 km away
- 5.649 km E of Union, Philippines · 19356 days ago · 45 km deep · 37 km away
- 5.26 km NNE of Pilar, Philippines · 19350 days ago · 77 km deep · 72 km away
- 4.911 km ESE of Santa Monica, Philippines · 19348 days ago · 76 km deep · 69 km away
- 5.05 km E of Pilar, Philippines · 19348 days ago · 71 km deep · 71 km away
- 4.975 km ENE of Pilar, Philippines · 19348 days ago · 44 km deep · 6 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003hf. Read Tue, Sep 22, 2026, 4:24 PM UTC.