Real-time coverage of earthquake event — 5 km S of San José del Palmar, Colombia — Pandita Data.
🌍 OPEN LIVE 3D EARTHQUAKE MAPA magnitude 7.4 earthquake struck 5 km south of San José del Palmar, Colombia, at 12:34 UTC on August 10, 2026, at a depth of 110.3 km. The USGS issued an ORANGE PAGER alert, indicating significant potential for casualties and economic losses across southwestern Colombia and neighboring regions. No tsunami warning was issued due to the inland location and depth. The event was felt by 991 people across a wide area, with intensified shaking reported in the Chocó and Cauca departments.
This magnitude 7.4 event is among Colombia's most significant seismic incidents in over a decade. The deeper focal depth—110.3 km—places the rupture within the subducting Nazca Plate, which descends beneath the South American Plate at the Pacific coast. While this intermediate depth reduces tsunami risk, it allows energy to propagate efficiently through the crust, producing strong shaking across a broader geographic footprint. Preliminary reports indicate power outages in San José del Palmar and surrounding municipalities, with structural assessments underway for hospitals, schools, and bridges along the Pan-American Highway.
Colombia sits at the convergent boundary where the Nazca Plate subducts eastward beneath the South American Plate at approximately 2.5 cm/year. The San José del Palmar region lies within the Wadati-Benioff zone—a well-defined region of seismicity within the descending slab. This intermediate-depth earthquake (110.3 km) occurs due to stress accumulation and brittle failure within the cold, dense oceanic lithosphere as it descends into the mantle. The subduction geometry creates a family of earthquakes at varying depths; shallow events near the trench pose tsunami risk, while intermediate-depth events like this one generate widespread felt motion but minimal tsunamis. Historical seismicity in this zone includes the 1994 Cauca earthquake (M6.2) and the 1906 Colombia-Ecuador earthquake (M8.8), establishing the region as a major seismic hazard zone.
The magnitude 7.4 earthquake released approximately 8.0 × 10^15 joules of energy—equivalent to 1,900 megatons of TNT. At this intermediate depth, the rupture occurred within the rigid, rapidly-cooling oceanic slab where temperatures exceed 600°C. Unlike shallow crustal earthquakes where rupture propagates along discrete faults, intermediate-depth events occur through volume changes and mineral phase transitions within the descending plate. This mechanism produces uniform, long-duration shaking that penetrates hundreds of kilometers horizontally, explaining why the event was felt across a multi-departmental area despite its distance from major population centers.
Shallow events (<70 km): Produce sharp, violent shaking; high tsunami risk; damage concentrated near epicenter. Intermediate-depth events (70–300 km): Longer-duration shaking; wider felt area; minimal tsunami risk; energy disperses over larger geographic regions. This M7.4 at 110.3 km sits squarely in the intermediate zone, producing felt motion across southwestern Colombia but sparing the Pacific coast from significant seismic sea-wave activity.
San José del Palmar (population ~8,000) and surrounding municipalities in Chocó and Cauca departments face moderate to significant earthquake impacts. The ORANGE PAGER alert indicates 1–100 estimated fatalities and economic losses potentially exceeding $10 million USD, depending on building code compliance and vulnerability. Most structures in rural areas lack seismic reinforcement; older adobe and unreinforced masonry buildings pose the greatest collapse risk. The Pan-American Highway, a critical infrastructure corridor connecting Central and South America, may experience localized damage. Colombian geological services (Servicio Geológico Colombiano) have deployed rapid-response teams to assess bridge integrity, landslide activity, and water supply systems. Aftershocks of magnitude 5.5–6.2 are possible within days; residents should remain vigilant for cascading hazards.