M4.8 Earthquake 15 km E of Río Segundo, Costa Rica — February 18, 2023
2023-02-18 08:24:12 UTC (2023-02-18) · approx. 2:24 AM UTC-6 local
Felt by 46 people across nearby locations.
On February 18, 2023 at 08:24 UTC, a magnitude 4.8 shallow crustal earthquake struck 15 km E of Río Segundo, Costa Rica, at a depth of 10.0 km and coordinates 10.2363°, -84.1734°. This earthquake was detected by 88 seismic stations with good location accuracy and was assigned a USGS significance rating of 384, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — 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 46 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
-84.1734°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.8 earthquake near Río Segundo, Costa Rica?
The magnitude 4.8 earthquake that struck 15 km E of Río Segundo, Costa Rica on February 18, 2023 at 08:24 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 10.2363°, -84.1734°, which is 15 km E of Río Segundo, Costa Rica.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000jpvz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 18, 2023). M4.8 Earthquake 15 km E of Río Segundo, Costa Rica — February 18, 2023. Retrieved April 22, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000jpvz/