M4.3 Earthquake 21 km SSE of Los Chiles, Costa Rica — August 7, 2023
2023-08-07 20:03:53 UTC (2023-08-07) · approx. 2:03 PM UTC-6 local
On August 7, 2023 at 20:03 UTC, a magnitude 4.3 intermediate depth earthquake struck 21 km SSE of Los Chiles, Costa Rica, at a depth of 163.3 km and coordinates 10.8531°, -84.6521°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-84.6521°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Los Chiles, Costa Rica?
The magnitude 4.3 earthquake that struck 21 km SSE of Los Chiles, Costa Rica on August 7, 2023 at 20:03 UTC had a depth of 163.3 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000kyi1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 7, 2023). M4.3 Earthquake 21 km SSE of Los Chiles, Costa Rica — August 7, 2023. Retrieved October 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kyi1/