M4.1 Earthquake 126 km ESE of Arica, Chile — October 20, 2020
2020-10-20 23:48:55 UTC (2020-10-20) · approx. 6:48 PM UTC-5 local
On October 20, 2020 at 23:48 UTC, a magnitude 4.1 intermediate depth earthquake struck 126 km ESE of Arica, Chile, at a depth of 135.9 km and coordinates -18.9386°, -69.2021°.
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.
Earthquake Details
-69.2021°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Arica, Chile?
The magnitude 4.1 earthquake that struck 126 km ESE of Arica, Chile on October 20, 2020 at 23:48 UTC had a depth of 135.9 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.
Actions
Location
Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000caep). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 20, 2020). M4.1 Earthquake 126 km ESE of Arica, Chile — October 20, 2020. Retrieved December 29, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000caep/