M4.9 earthquake 13 km E of Pilar, Philippines
A magnitude 4.9 earthquake struck 13 km E of Pilar, Philippines on Sun, Sep 23, 1973, 10:35 PM GMT+8 (14:35 UTC), 45 km (28 mi) below the surface.
A larger quake followed: M5.2 28 km ENE of Pilar, 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
- 1973-09-23 14:35:29 UTC
- Depth
- 45.0 km (28.0 mi), shallow
- Epicenter
- 9.860° N, 126.226° 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
- 29
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 8 in the 60 days after this one and 6 in the 30 days before it.
After
- 5.228 km ENE of Pilar, Philippines · 19357 days ago · 46 km deep · 16 km away
- 4.715 km WNW of Del Carmen, Surigao del Norte, Philippines · 19357 days ago · 120 km deep · 43 km away
- 5.649 km E of Union, Philippines · 19357 days ago · 45 km deep · 37 km away
- 5.26 km NNE of Pilar, Philippines · 19351 days ago · 77 km deep · 13 km away
- 4.911 km ESE of Santa Monica, Philippines · 19348 days ago · 76 km deep · 17 km away
- 5.05 km E of Pilar, Philippines · 19348 days ago · 71 km deep · 8 km away
- 4.975 km ENE of Pilar, Philippines · 19348 days ago · 44 km deep · 63 km away
- 5.04 km NE of Tagana-an, Philippines · 19344 days ago · 82 km deep · 68 km away
Before
- 4.881 km E of Union, Philippines · 19357 days ago · 37 km deep · 68 km away
- 4.576 km ENE of Pilar, Philippines · 19357 days ago · 33 km deep · 64 km away
- 4.74 km E of Union, Philippines · 19358 days ago · 69 km deep · 14 km away
- 5.17 km ESE of Pilar, Philippines · 19359 days ago · 54 km deep · 8 km away
- 5.325 km ENE of Pilar, Philippines · 19359 days ago · 36 km deep · 15 km away
- 5.84 km SW of Mabahin, Philippines · 19368 days ago · 68 km deep · 79 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003hj. Read Tue, Sep 22, 2026, 10:28 PM UTC.