M4.5 earthquake 104 km SW of Basco, Philippines
A magnitude 4.5 earthquake struck 104 km SW of Basco, Philippines on Tue, Aug 6, 1985, 11:03 PM GMT+8 (15:03 UTC), 61 km (38 mi) below the surface.
A larger quake followed: M5.0 97 km SW of Basco, 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
- 1985-08-06 15:03:02 UTC
- Depth
- 60.7 km (37.7 mi), shallow
- Epicenter
- 19.695° N, 121.372° 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: 4 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.5Babuyan Islands region, Philippines · 15021 days ago · 70 km deep · 2 km away
- 4.4138 km W of Basco, Philippines · 15018 days ago · 33 km deep · 95 km away
- 5.097 km SW of Basco, Philippines · 15016 days ago · 28 km deep · 33 km away
- 4.6109 km SW of Basco, Philippines · 14996 days ago · 33 km deep · 27 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002hep. Read Tue, Sep 22, 2026, 2:43 AM UTC.