M4.6 Earthquake 18 km SSE of Talisay, Philippines — July 21, 2026
2026-07-21 13:48:06 UTC (23 hours ago) · approx. 9:48 PM UTC+8 local
Aftershock of the M5.4 mainshock.
On July 21, 2026 at 13:48 UTC, a magnitude 4.6 shallow crustal earthquake struck 18 km SSE of Talisay, Philippines, at a depth of 10.0 km and coordinates 13.0193°, 122.6735°. This earthquake was detected by 64 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.4 mainshock that occurred 9 days ago 24 km W of Mabiton, Philippines. Since the mainshock, the USGS has recorded 2 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
The epicenter is located in Philippines, a region characterized by the Manila Trench and Philippine Trench subduction systems, where the Philippine Sea Plate overrides the Eurasian Plate. The nearest mapped fault system is the Philippine Fault. View all earthquakes in Philippines.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
122.6735°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Talisay, Philippines?
The magnitude 4.6 earthquake that struck 18 km SSE of Talisay, Philippines on July 21, 2026 at 13:48 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 13.0193°, 122.6735°, which is 18 km SSE of Talisay, Philippines. View all earthquakes in Philippines.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.4 one earlier?
No. This magnitude 4.6 earthquake is an aftershock of the larger magnitude 5.4 mainshock that occurred earlier 24 km W of Mabiton, Philippines. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Has Philippines had earthquakes this big before?
The largest recorded earthquake in Philippines was the M8.0 Mindanao earthquake of August 17, 1976. Today's magnitude 4.6 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000t26k). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 21, 2026). M4.6 Earthquake 18 km SSE of Talisay, Philippines — July 21, 2026. Retrieved July 21, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t26k/