M4.5 earthquake 12 km WSW of San Alfonso, Philippines
A magnitude 4.5 earthquake struck 12 km WSW of San Alfonso, Philippines on Mon, Aug 15, 1983, 12:19 PM GMT+8 (04:19 UTC), 106 km (66 mi) below the surface.
A larger quake followed: M6.0 4 km W of Bunawan, 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1983-08-15 04:19:22 UTC
- Depth
- 106.4 km (66.1 mi), intermediate-depth
- Epicenter
- 7.724° N, 126.325° 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
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 5.23 km NW of Bunawan, Philippines · 15742 days ago · 44 km deep · 65 km away
- 4.36 km WSW of Binucayan, Philippines · 15742 days ago · 44 km deep · 91 km away
- 6.04 km W of Bunawan, Philippines · 15742 days ago · 21 km deep · 65 km away
- 5.21 km NW of San Alfonso, Philippines · 15728 days ago · 181 km deep · 12 km away
- 5.68 km SE of Baganga, Philippines · 15726 days ago · 47 km deep · 40 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001xpk. Read Fri, Oct 2, 2026, 10:51 PM UTC.