M5.8 earthquake 27 km WSW of Union, Philippines
A magnitude 5.8 earthquake struck 27 km WSW of Union, Philippines on Wed, Oct 22, 1975, 11:59 PM GMT+8 (15:59 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.8 (ms), moderate
- Local time
- UTC
- 1975-10-22 15:59:48 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 11.647° N, 121.672° E
- Region
- Philippines
- Strongest shaking
- V, moderate shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- V, moderate shaking
- Peak ground acceleration
- 7.0% of gravity
- Peak ground velocity
- 1.7 cm/s
- Map
- Automatic
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
- OPERATOR_ASSIGNED
- Stations used
- 102
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 1 in the 60 days after this one and 3 in the 30 days before it.
After
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000d8a (also filed as atlas19751022155947, iscgem723168). Read Wed, Sep 23, 2026, 9:33 PM UTC.