M4.1 Earthquake 6 km WNW of Santiago, Costa Rica — October 16, 2023
2023-10-16 23:26:04 UTC (2023-10-16) · approx. 5:26 PM UTC-6 local
On October 16, 2023 at 23:26 UTC, a magnitude 4.1 shallow crustal earthquake struck 6 km WNW of Santiago, Costa Rica, at a depth of 12.7 km and coordinates 9.8697°, -84.3695°.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 2 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-84.3695°E
Technical Information
Common Questions
How strong was the magnitude 4.1 earthquake near Santiago, Costa Rica?
The magnitude 4.1 earthquake that struck 6 km WNW of Santiago, Costa Rica on October 16, 2023 at 23:26 UTC had a depth of 12.7 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.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000lg4v). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 16, 2023). M4.1 Earthquake 6 km WNW of Santiago, Costa Rica — October 16, 2023. Retrieved December 26, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000lg4v/