M4.8 earthquake 98 km WNW of Basco, Philippines
A magnitude 4.8 earthquake struck 98 km WNW of Basco, Philippines on Sat, Jan 21, 1984, 1:40 AM GMT+8 (17:40 UTC), 19 km (12 mi) below the surface.
A larger quake followed: M4.9 108 km W 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
- 4.8 (mb), light
- Local time
- UTC
- 1984-01-20 17:40:04 UTC
- Depth
- 18.8 km (11.7 mi), shallow
- Epicenter
- 20.740° N, 121.076° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 1 in the 60 days after this one and 9 in the 30 days before it.
After
Before
- 4.493 km W of Basco, Philippines · 15593 days ago · 35 km deep · 28 km away
- 4.390 km W of Basco, Philippines · 15597 days ago · 33 km deep · 29 km away
- 4.7107 km W of Basco, Philippines · 15597 days ago · 21 km deep · 32 km away
- 3.9129 km W of Basco, Philippines · 15597 days ago · 38 km deep · 60 km away
- 4.585 km SW of Basco, Philippines · 15597 days ago · 66 km deep · 96 km away
- 4.4117 km W of Basco, Philippines · 15597 days ago · 33 km deep · 36 km away
- 4.2110 km W of Basco, Philippines · 15599 days ago · 33 km deep · 44 km away
- 5.298 km W of Basco, Philippines · 15600 days ago · 22 km deep · 29 km away
- 4.8102 km WSW of Basco, Philippines · 15606 days ago · 33 km deep · 87 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00021e0. Read Sun, Sep 27, 2026, 1:29 AM UTC.