M4.2 Earthquake 5 km ENE of Allangigan Primero, Philippines — September 24, 2021
2021-09-24 22:07:59 UTC (2021-09-24) · approx. 6:07 AM UTC+8 local
On September 24, 2021 at 22:07 UTC, a magnitude 4.2 shallow crustal earthquake struck 5 km ENE of Allangigan Primero, Philippines, at a depth of 39.1 km and coordinates 17.2017°, 120.5361°.
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.
Earthquake Details
120.5361°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Allangigan Primero, Philippines?
The magnitude 4.2 earthquake that struck 5 km ENE of Allangigan Primero, Philippines on September 24, 2021 at 22:07 UTC had a depth of 39.1 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.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000fq6p). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 24, 2021). M4.2 Earthquake 5 km ENE of Allangigan Primero, Philippines — September 24, 2021. Retrieved December 4, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000fq6p/