Magnitude 5.6 Earthquake at Depth 8 km Strikes Off Coast of Costa Rica on 30th September 2026

A Magnitude 5.6 earthquake struck off the coast of Costa Rica on 30th September 2026, recorded at a shallow depth of 8 km. The seismic event occurred at 21:55 UTC and was confirmed by the United States Geological Survey (USGS). Due to its offshore location, the quake was felt across parts of Costa Rica’s Pacific coastline, particularly in communities closest to the epicentre.

Although earthquakes of this magnitude can cause noticeable shaking, early indications suggest no major damage or serious injuries. However, residents in coastal regions reported brief tremors, rattling windows, and mild swaying of buildings. Local authorities monitored the situation closely, especially given Costa Rica’s position along the seismically active Central American subduction zone, where the Cocos Plate pushes beneath the Caribbean Plate.

Costa Rica experiences frequent seismic activity due to this tectonic interaction, and offshore quakes like this one are common. The shallow depth of 8 km increases the intensity of shaking felt near the epicentre, even when the magnitude is moderate.

Emergency services and monitoring agencies in Costa Rica continue to assess the region for any delayed impacts, including minor landslides or structural cracks. No tsunami warning was issued, and the event is currently classified as a moderate offshore earthquake with low risk of significant aftershocks.

🌍 Regional Seismic Context

Costa Rica sits within one of the most geologically active zones in Central America. The country regularly experiences earthquakes due to the Cocos–Caribbean Plate boundary, making offshore quakes like this part of the region’s natural seismic behaviour.

This latest event adds to ongoing seismic activity observed throughout September 2026 across the Pacific Ring of Fire, where multiple moderate earthquakes have been recorded.

🔎 Key Earthquake Details

• Magnitude: 5.6
• Depth: 8 km
• Location: Off Coast of Costa Rica
• Date: 30th September 2026
• Time: 21:55 UTC
• Source: USGS