Following the 7.4 magnitude earthquake that struck Colombia on August 10, 2026, the Servicio Geológico Colombiano (SGC) has monitored persistent seismic activity. On August 11, the agency recorded two distinct tremors near San José del Palmar, Chocó, and Chipatá, Santander, as the region continues to experience energy release in the form of aftershocks.
Seismic Activity in Chocó and Santander
The SGC reported two seismic events within five minutes of each other on the afternoon of August 11. The first tremor occurred at 5:24 p.m. local time, centered 17 kilometers from San José del Palmar, Chocó. According to the SGC, this event reached a magnitude of 3.5 at a depth of 116 kilometers. Residents in parts of Bogotá, Cali, Tuluá, and Medellín reported feeling the movement, according to accounts cited by El Tiempo.
A second tremor followed at 5:29 p.m. in the department of Santander. This sismo registered a magnitude of 3.6 and was located six kilometers from the municipality of Chipatá. The SGC noted the depth of this event was 125 kilometers, positioning it near Vélez and Guavatá.
Understanding Aftershocks and Energy Release
The SGC defines aftershocks as lower-magnitude seismic movements that occur in the same region following a primary earthquake. These events are a natural part of the crustal adjustment process. The agency stated that this activity may persist for days, weeks, or even months as the surrounding areas work to reach a new state of equilibrium following the initial rupture.
The SGC informed that, as of 6 p.m. this Tuesday, it had registered 106 replicas related to the earthquake, of which 8 had a magnitude greater than 3.0 and 1 had a magnitude greater than 4.0.
Comparative Data: Recent Seismic Trends
The current activity follows the major 7.4 magnitude earthquake that struck the center and west of the country on the morning of August 10. While the primary event caused significant structural damage—including reports of roughly 1,300 homes affected in Roldanillo, Valle del Cauca—the subsequent tremors represent a standard, albeit concerning, release of tectonic stress.
The SGC continues to update its official registry as new movements are detected. Residents in affected zones are encouraged to monitor the SGC’s official channels for real-time updates and follow established emergency protocols provided by local authorities.
Frequently Asked Questions
Are these new tremors considered separate earthquakes?
The SGC classifies these as aftershocks, which are smaller seismic events occurring in the same region as the primary earthquake as the fault line settles.
How long will these aftershocks continue?
According to the SGC, the duration of aftershock sequences is variable and can last for days, weeks, or months while the earth continues to release energy.
Where can I find official information on seismic activity?
The Servicio Geológico Colombiano (SGC) publishes verified reports on all seismic events in the country through their official website and social media channels.
What should I do during a tremor?
Follow the official guidelines provided by the National Unit for Disaster Risk Management (UNGRD), which include remaining calm, identifying safe zones, and avoiding elevators or glass structures.
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