M3.9 Earthquake 5 km WNW of Tejar, Costa Rica — February 22, 2021
2021-02-22 23:50:29 UTC (2021-02-22) · approx. 5:50 PM UTC-6 local
Felt by 10 people across nearby locations.
On February 22, 2021 at 23:50 UTC, a magnitude 3.9 shallow crustal earthquake struck 5 km WNW of Tejar, Costa Rica, at a depth of 10.0 km and coordinates 9.7706°, -84.2785°.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 296 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 10 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
-84.2785°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.9 earthquake near Tejar, Costa Rica?
The magnitude 3.9 earthquake that struck 5 km WNW of Tejar, Costa Rica on February 22, 2021 at 23:50 UTC had a depth of 10.0 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 9.7706°, -84.2785°, which is 5 km WNW of Tejar, Costa Rica.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.9 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000dkab). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, February 22, 2021). M3.9 Earthquake 5 km WNW of Tejar, Costa Rica — February 22, 2021. Retrieved May 4, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000dkab/