4.2

M4.2 Earthquake 3 km N of Magdug, Philippines — July 15, 2021

2021-07-15 19:10:50 UTC (2021-07-15) · approx. 3:10 AM UTC+8 local

MagnitudeM4.2(mb)
Time19:10 UTC≈ 3:10 AM UTC+8
Depth82.5 kmintermediate depth
Coordinates6.576°, 126.095°
Felt byNo felt reports
Status✓ Reviewed by USGS

On July 15, 2021 at 19:10 UTC, a magnitude 4.2 intermediate depth earthquake struck 3 km N of Magdug, Philippines, at a depth of 82.5 km and coordinates 6.5763°, 126.0947°.

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 6.58°, 126.09°

Earthquake Details

Magnitude
4.2 mb
Depth
82.5 km
intermediate depth
Location
6.5763°N
126.0947°E

Technical Information

Event ID
us6000exp1
Event Type
earthquake
Status
✓ Reviewed
Significance
271
Azimuthal Gap
156.0°
Min Station Distance
0.708°
RMS Residual
0.95 sec
Last Updated
2021-09-17 22:49:56 UTC

Common Questions

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

The magnitude 4.2 earthquake that struck 3 km N of Magdug, Philippines on July 15, 2021 at 19:10 UTC had a depth of 82.5 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: us6000exp1). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2021, July 15, 2021). M4.2 Earthquake 3 km N of Magdug, Philippines — July 15, 2021. Retrieved September 17, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000exp1/