Philippines earthquakes

M4.5 earthquake 45 km E of Union, Philippines

A magnitude 4.5 earthquake struck 45 km E of Union, Philippines on Thu, Oct 16, 2003, 12:47 AM GMT+8 (16:47 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.8 33 km ESE of Union, Philippines. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2003-10-15 16:47:37 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
9.689° N, 126.519° E
Tsunami flag
No
Status
Reviewed by a seismologist

What happened

The USGS’s account of the effects of this earthquake.

no people dead or missing; no people injured; no buildings damaged or destroyed

From the USGS event page for usp000caes. U.S. Geological Survey text and figures are in the public domain.

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
121°
Stations used
25

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 4.194 km E of Union, Philippines · 8386 days ago · 33 km deep · 51 km away
  2. 4.076 km E of Union, Philippines · 8386 days ago · 33 km deep · 31 km away
  3. 4.229 km NNE of Cortes, Philippines · 8368 days ago · 33 km deep · 32 km away
  4. 4.833 km ESE of Union, Philippines · 8357 days ago · 33 km deep · 14 km away
  5. 4.580 km ENE of Aras-asan, Philippines · 8355 days ago · 33 km deep · 80 km away
  6. 4.38 km WNW of Del Carmen, Surigao del Norte, Philippines · 8341 days ago · 112 km deep · 72 km away

Before

  1. 4.412 km N of Santa Monica, Philippines · 8389 days ago · 76 km deep · 70 km away
  2. 4.338 km ESE of Union, Philippines · 8390 days ago · 68 km deep · 8 km away
  3. 4.265 km E of Union, Philippines · 8390 days ago · 54 km deep · 22 km away
  4. 4.824 km E of Cortes, Philippines · 8390 days ago · 68 km deep · 43 km away
  5. 4.768 km E of Union, Philippines · 8391 days ago · 33 km deep · 28 km away
  6. 4.481 km E of Cortes, Philippines · 8403 days ago · 33 km deep · 54 km away
  7. 4.225 km N of Santa Monica, Philippines · 8407 days ago · 71 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000caes. Read Thu, Oct 1, 2026, 8:04 AM UTC.