M4.7 earthquake 4 km E of Union, Philippines
A magnitude 4.7 earthquake struck 4 km E of Union, Philippines on Sun, Sep 23, 1973, 12:05 AM GMT+8 (16:05 UTC), 69 km (43 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
- 4.7 (mb), light
- Local time
- UTC
- 1973-09-22 16:05:58 UTC
- Depth
- 69.0 km (42.9 mi), shallow
- Epicenter
- 9.760° N, 126.155° 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
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 12 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.576 km ENE of Pilar, Philippines · 19357 days ago · 33 km deep · 76 km away
- 4.881 km E of Union, Philippines · 19357 days ago · 37 km deep · 77 km away
- 4.913 km E of Pilar, Philippines · 19357 days ago · 45 km deep · 14 km away
- 5.228 km ENE of Pilar, Philippines · 19357 days ago · 46 km deep · 29 km away
- 4.715 km WNW of Del Carmen, Surigao del Norte, Philippines · 19357 days ago · 120 km deep · 39 km away
- 5.649 km E of Union, Philippines · 19356 days ago · 45 km deep · 45 km away
- 5.26 km NNE of Pilar, Philippines · 19350 days ago · 77 km deep · 18 km away
- 4.911 km ESE of Santa Monica, Philippines · 19348 days ago · 76 km deep · 25 km away
- 5.05 km E of Pilar, Philippines · 19348 days ago · 71 km deep · 13 km away
- 4.975 km ENE of Pilar, Philippines · 19348 days ago · 44 km deep · 76 km away
- 5.04 km NE of Tagana-an, Philippines · 19344 days ago · 82 km deep · 59 km away
- 5.0Mindanao, Philippines · 19304 days ago · 83 km deep · 91 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003h1. Read Tue, Sep 22, 2026, 9:25 PM UTC.