M4.7 Earthquake 40 km SSE of Quepos, Costa Rica — March 11, 2023
2023-03-11 17:08:45 UTC (2023-03-11) · approx. 11:08 AM UTC-6 local
On March 11, 2023 at 17:08 UTC, a magnitude 4.7 shallow crustal earthquake struck 40 km SSE of Quepos, Costa Rica, at a depth of 10.5 km and coordinates 9.0785°, -84.0692°. This earthquake was detected by 64 seismic stations with good location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-84.0692°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.7 earthquake near Quepos, Costa Rica?
The magnitude 4.7 earthquake that struck 40 km SSE of Quepos, Costa Rica on March 11, 2023 at 17:08 UTC had a depth of 10.5 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 9.0785°, -84.0692°, which is 40 km SSE of Quepos, Costa Rica.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000jj5h). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, March 11, 2023). M4.7 Earthquake 40 km SSE of Quepos, Costa Rica — March 11, 2023. Retrieved May 15, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jj5h/