M4.2 Earthquake 46 km ESE of Vallenar, Chile — October 26, 2023
2023-10-26 22:26:09 UTC (2023-10-26) · approx. 5:26 PM UTC-5 local
On October 26, 2023 at 22:26 UTC, a magnitude 4.2 intermediate depth earthquake struck 46 km ESE of Vallenar, Chile, at a depth of 100.1 km and coordinates -28.6971°, -70.3084°.
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
-70.3084°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Vallenar, Chile?
The magnitude 4.2 earthquake that struck 46 km ESE of Vallenar, Chile on October 26, 2023 at 22:26 UTC had a depth of 100.1 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.
Actions
Location
Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000l6p2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 26, 2023). M4.2 Earthquake 46 km ESE of Vallenar, Chile — October 26, 2023. Retrieved January 4, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000l6p2/