4.1

M4.1 Earthquake 234 km SSE of Tabiauan, PhilippinesApril 12, 2023

2023-04-12 20:56:18 UTC (2023-04-12) · approx. 4:56 AM UTC+8 local

MagnitudeM4.1(mb)
Time20:56 UTC4:56 AM UTC+8
Depth604.8 kmdeep-focus
Coordinates4.017°, 122.556°
Felt byNo felt reports
Status✓ Reviewed by USGS

On April 12, 2023 at 20:56 UTC, a magnitude 4.1 deep-focus earthquake struck 234 km SSE of Tabiauan, Philippines, at a depth of 604.8 km and coordinates 4.0167°, 122.5556°.

Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 4.02°, 122.56°

Earthquake Details

Magnitude
4.1 mb
Depth
604.8 km
deep-focus
Location
4.0167°N
122.5556°E

Technical Information

Event ID
us6000k3wy
Event Type
earthquake
Status
✓ Reviewed
Significance
259
Stations Used
35
Azimuthal Gap
116.0°
Min Station Distance
9.966°
RMS Residual
0.71 sec
Last Updated
2023-06-17 21:36:49 UTC

Common Questions

How strong was the magnitude 4.1 earthquake near Tabiauan, Philippines?

The magnitude 4.1 earthquake that struck 234 km SSE of Tabiauan, Philippines on April 12, 2023 at 20:56 UTC had a depth of 604.8 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 4.1 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 4.1 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us6000k3wy). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2023, April 12, 2023). M4.1 Earthquake 234 km SSE of Tabiauan, PhilippinesApril 12, 2023. Retrieved June 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000k3wy/