M4.2 Earthquake west of Vancouver Island — April 21, 2025
2025-04-21 22:27:35 UTC (2025-04-21) · approx. 1:27 PM UTC-9 local
On April 21, 2025 at 22:27 UTC, a magnitude 4.2 shallow crustal earthquake struck west of Vancouver Island, at a depth of 10.0 km and coordinates 51.0125°, -136.0243°.
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
-136.0243°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake west of Vancouver Island?
The magnitude 4.2 earthquake that struck west of Vancouver Island on April 21, 2025 at 22:27 UTC had a depth of 10.0 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.
Actions
Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000pu3a). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 21, 2025). M4.2 Earthquake west of Vancouver Island — April 21, 2025. Retrieved June 27, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pu3a/