Chocó is still moving more than a month after Colombia’s 7.4 earthquake
A seismic swarm around Sipí and Istmina in the middle San Juan region of Chocó continues to produce tremors across the department as President De La Espriella visits to oversee reconstruction. The earth beneath Chocó has continued to move more than a month after a magnitude 7.4 earthquake struck Colombia’s Pacific litoral, with a series […]
Since the magnitude 7.4 earthquake struck Colombia's Pacific coast more than a month ago, the ground in Chocó has continued to tremble. A seismic swarm, distinct from aftershocks, has emerged in the middle San Juan region, with tremors centered around Sipí and Istmina. The Servicio Geológico Colombiano (SGC) explains that aftershocks follow a main earthquake, decreasing in frequency and size over time, while a seismic swarm involves multiple earthquakes of varying magnitudes without a dominant event.
Some aftershocks have occurred at depths between 70 and 120 kilometers, and the persistent activity in Chocó corresponds to this swarm. On September 14, a magnitude 3.4 tremor was recorded, setting off a sequence of quakes that intensified throughout the day, reaching magnitudes of 4.1 and 4.9. Residents have reported over 2,000 instances of feeling the earthquakes, primarily in surrounding departments.
Chocó's Governor, Nubia Carolina Córdoba, has defended the government's aid efforts, noting that over 300 tonnes of supplies have reached affected areas, though logistical challenges persist due to remote locations and limited transportation.
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