3.4
Earthquake Details: off the coast of Costa Rica
8/18/2026, 11:57:43 PM
A magnitude 3.4 earthquake occurred near off the coast of Costa Rica on 8/18/2026 at 11:57:43 PM. The seismic event was recorded at a depth of -10 km. No tsunami warning was issued.
No Tsunami WarningStatus: reviewedType: earthquake
Regional Seismicity
Technical Details
Depth-10 km
Significance0
Latitude8.0043
Longitude-86.8959
Event IDemsc:20260818_0000838
Magnitude3.4
Updated:8/19/2026, 12:08:17 AM
External Resources
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Time & depth
- Local time
- 8/18/2026, 5:57:43 PM CST
- UTC
- 8/18/2026, 11:57:43 PM UTC
-10 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 12
M3.7Costa RicaBeforeM2.9off the coast of Costa RicaBeforeM3.9off the coast of Costa RicaBeforeM2.8Costa RicaBeforeM3.7off the coast of Costa RicaBeforeM3.2south of PanamaBeforeM2.7Costa RicaBeforeM2.8south of PanamaBeforeM3.0Costa RicaBeforeM2.9near the coast of NicaraguaBeforeM3.6near the coast of NicaraguaBeforeM2.7near the coast of NicaraguaAfter
Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Aug 19, 2026, 12:08 AM UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. CC BY 4.0
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies. CC BY 4.0
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.