M4.3 Earthquake 27 km WSW of San Isidro, Costa Rica — May 25, 2022
2022-05-25 18:48:49 UTC (2022-05-25) · approx. 12:48 PM UTC-6 local
On May 25, 2022 at 18:48 UTC, a magnitude 4.3 shallow crustal earthquake struck 27 km WSW of San Isidro, Costa Rica, at a depth of 7.1 km and coordinates 9.2686°, -83.9306°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.0 mainshock that occurred 1 day ago 45 km SSE of Quepos, Costa Rica. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 5 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
-83.9306°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near San Isidro, Costa Rica?
The magnitude 4.3 earthquake that struck 27 km WSW of San Isidro, Costa Rica on May 25, 2022 at 18:48 UTC had a depth of 7.1 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.
Is this the same earthquake as the M5.0 one earlier?
No. This magnitude 4.3 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 45 km SSE of Quepos, Costa Rica. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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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: us7000hchg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, May 25, 2022). M4.3 Earthquake 27 km WSW of San Isidro, Costa Rica — May 25, 2022. Retrieved August 2, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000hchg/