4.2

M4.2 Earthquake 69 km SE of Pondaguitan, Philippines — January 31, 2021

2021-01-31 20:54:42 UTC (2021-01-31) · approx. 4:54 AM UTC+8 local

MagnitudeM4.2(mb)
Time20:54 UTC≈ 4:54 AM UTC+8
Depth75.5 kmintermediate depth
Coordinates5.844°, 126.540°
Felt byNo felt reports
Status✓ Reviewed by USGS

On January 31, 2021 at 20:54 UTC, a magnitude 4.2 intermediate depth earthquake struck 69 km SE of Pondaguitan, Philippines, at a depth of 75.5 km and coordinates 5.8436°, 126.5404°.

Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 5.84°, 126.54°

Earthquake Details

Magnitude
4.2 mb
Depth
75.5 km
intermediate depth
Location
5.8436°N
126.5404°E

Technical Information

Event ID
us6000dev2
Event Type
earthquake
Status
✓ Reviewed
Significance
271
Azimuthal Gap
196.0°
Min Station Distance
5.105°
RMS Residual
0.58 sec
Last Updated
2021-04-16 19:03:46 UTC

Common Questions

How strong was the magnitude 4.2 earthquake near Pondaguitan, Philippines?

The magnitude 4.2 earthquake that struck 69 km SE of Pondaguitan, Philippines on January 31, 2021 at 20:54 UTC had a depth of 75.5 km. For context, this was a light earthquake commonly felt near the epicenter.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.2 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 4.2 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us6000dev2). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2021, January 31, 2021). M4.2 Earthquake 69 km SE of Pondaguitan, Philippines — January 31, 2021. Retrieved April 16, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000dev2/