The Colombian Geological Service (SGC) stated on August 31 that seismic activity in Chocó following the August 10 earthquake exhibits two distinct behaviors rather than a single pattern. ^[1] The Servicio Geológico Colombiano (SGC) identified a distinct seismic swarm in the Chocó department following the 7.4 magnitude earthquake that occurred on August 10, 2026. ^[2] On August 10, 2026, Colombia recorded a magnitude 7.4 earthquake with an epicenter in San Jose del Palmar, Choco, at a depth of 103 kilometers. ^[3] In sectors including Sipí, Istmina, Medio San Juan, and Litoral del San Juan, the SGC identified a second activity pattern at depths between 30 and 60 kilometers, characterized as a seismic swarm. ^[4] The SGC clarified that it is currently impossible to conclude a single mechanism for the swarm and cannot predict if, when, or how large the next earthquake will be. ^[5] The SGC reported that the main earthquake occurred at 7:34 AM on August 10 with a depth of 103 kilometers and released energy equivalent to between 125 and 130 Hiroshima atomic bombs. ^[6] A second group of seismic movements was observed at depths between 30 and 60 kilometers near the municipalities of Sipí, Istmina, Medio San Juan, and Litoral del San Juan, displaying variable frequencies without the progressive decline typical of aftershocks. ^[7] The largest aftershock occurred on August 10, 2026, with a magnitude of 4.8 at a depth of approximately 95 kilometers near San José del Palmar, followed by a second major event on August 13, 2026, with a magnitude of 4.3 at 99 kilometers depth. ^[8] The SGC identified two groups of seismic activity: one near San Jose del Palmar consistent with aftershocks, and a second group in Sipí, Istmina, and Medio San Juan consistent with a seismic swarm. ^[9] The SGC stated that the seismic swarm does not mean a major earthquake will occur and that the phenomenon could last for days, weeks, or months. ^[10]