[REVISION HISTORY]

Seismic activity and recovery in Colombia

Updated 20 times since CLSTR started tracking revisions of this situation.

What changed

2026-09-18 11:38 UTC → 2026-09-30 02:49 UTC · added ~~removed~~

Following the devastating magnitude 7.4 earthquake on August 10 in Chocó, which caused at least 331 deaths and thousands of injuries, Colombia has experienced continued seismic activity. The initial event, centered in San José del Palmar, created significant uncertainty for travelers and led to widespread cancellations and route modifications in cities such as Bogotá, Medellín, and Cali. The economic damage from the August 10 event is estimated at US$9.57 billion. One month after the initial disaster, the scale of the impact has been clarified, with 4,505 injuries reported and 498 municipalities affected across 16 departments. In Chocó, the crisis is acute, with over 110,000 people displaced and thousands of homes, schools, and health centers damaged. Seismic activity ~~has~~ intensified in Chocó throughout mid-September. On September ~~14,~~ 16, 2026, ~~the Colombian Geological Service (SGC) identified~~ a ~~seismic~~ swarm ~~centered primarily in the municipality~~ of ~~Istmina. On September 16, 2026, further activity was recorded, with~~ five tremors ~~occurring~~ occurred in less than one ~~hour between 3:12 p.m. and 4:05 p.m. local time. This sequence included a~~ hour, with magnitudes ranging from 3.3 to 4.7 ~~magnitude earthquake~~ in Medio San Juan, ~~a 4.4 magnitude event in~~ Sipí, ~~a 3.6 magnitude tremor in Medio San Juan,~~ and ~~two tremors in Istmina measuring 4.4 and 3.3 magnitude. These movements were felt in western cities including Cali, Medellín, and Pereira. Activity persisted through the weekend. On September 17,~~ Istmina. This was followed by a magnitude 4.6 earthquake ~~occurred~~ in ~~Sipí, followed ten minutes later by a 3.3 magnitude tremor. On the morning of~~ Sipí on September ~~18,~~ 17 and a magnitude 4.4 earthquake ~~was recorded~~ in ~~Juradó.~~ Juradó on September 18. While ~~authorities reported~~ no immediate victims ~~or significant structural damage~~ were reported from ~~this~~ these specific ~~swarm, the activity has~~ events, they contributed to heightened local concern. By late September, experts from the Colombian Geological Service (SGC) warned that aftershocks from the August 10 earthquake could persist for days, months, or even years as geological stresses readjust. The SGC also noted a sequence of movements in Chaparral, Tolima, where earthquakes up to magnitude 4.5 have been recorded. Authorities are investigating whether the August 10 event altered geological stresses in different regions, potentially linking it to the activity in Chaparral.

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