M4.2 Earthquake 6 km WNW of Tejar, Costa Rica — July 3, 2026
2026-07-03 04:18:06 UTC (2026-07-03) · approx. 10:18 PM UTC-6 local
On July 3, 2026 at 04:18 UTC, a magnitude 4.2 shallow crustal earthquake struck 6 km WNW of Tejar, Costa Rica, at a depth of 56.9 km and coordinates 9.7591°, -84.2855°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 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 5.2 mainshock that occurred 12 days ago 18 km NW of Jacó, 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
-84.2855°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Tejar, Costa Rica?
The magnitude 4.2 earthquake that struck 6 km WNW of Tejar, Costa Rica on July 3, 2026 at 04:18 UTC had a depth of 56.9 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 4.2 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.2 one earlier?
No. This magnitude 4.2 earthquake is an aftershock of the larger magnitude 5.2 mainshock that occurred earlier 18 km NW of Jacó, Costa Rica. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000t9sq). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 3, 2026). M4.2 Earthquake 6 km WNW of Tejar, Costa Rica — July 3, 2026. Retrieved July 5, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000t9sq/