M4.3 earthquake 40 km ESE of San Ignacio, Philippines
A magnitude 4.3 earthquake struck 40 km ESE of San Ignacio, Philippines on Thu, Jul 31, 2003, 9:20 PM GMT+8 (13:20 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 17 km E of Tibanbang, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 2003-07-31 13:20:55 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 6.927° N, 126.805° 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
- OPERATOR_ASSIGNED
- Station coverage gap
- 157°
- Stations used
- 13
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.716 km ESE of Jovellar, Philippines · 8444 days ago · 33 km deep · 25 km away
- 4.817 km E of Tibanbang, Philippines · 8444 days ago · 86 km deep · 68 km away
- 4.631 km E of Pondaguitan, Philippines · 8439 days ago · 33 km deep · 73 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000c3su. Read Wed, Sep 30, 2026, 6:55 PM UTC.