Why Does the Earth Keep Shaking in Chaparral, Tolima?
An unusual seismic swarm in the central lowlands of Colombia has produced more than 1,400 recorded earthquakes since September. A magnitude 5.6 tremor on Tuesday morning, felt as far away as Bogotá, has renewed questions about the geological forces beneath Tolima. BOGOTÁ — It was a sudden wake-up call for Bogotá when, at 4:13 a.m. […]
Since September, the central lowlands of Colombia have experienced over 1,400 recorded earthquakes, including a magnitude 5.6 tremor near Chaparral in Tolima on November 3. The powerful quake, initially reported at magnitude 5.3, was felt across the Colombian capital, affecting Bogotá, the foothills of Cundinamarca and Boyacá, the Coffee Region, Valle del Cauca, and other areas.
More than 4,500 residents reported feeling the movement, while emergency services assessed damage in affected municipalities. Mayor Helver González Mora reported two injuries and several damaged homes in Chaparral, with some structures reportedly destroyed. Geologists attribute this seismic activity to a network of geological faults and a phenomenon called a seismic swarm.
Unlike aftershocks, swarms involve numerous earthquakes in the same location over time, with no singular triggering event. Chaparral sits at a complex geological transition between the Central Cordillera and the upper Magdalena Valley, and the recent activity may be linked to the magnitude 7.4 earthquake in Chocó on August 10, which could have altered tectonic stresses.
While the connection between the two events remains unconfirmed, the latest earthquake occurred along the southwestern extension of the same narrow seismic alignment as previous movements. Previous significant earthquakes in Chaparral include a magnitude 6.7 in 1997 and magnitude 5.3 in 2007 and 2009. For residents of southern Tolima, the ongoing seismic activity raises concerns about the structural integrity of homes and public buildings, and authorities are reviewing safety measures.
The Colombian Geological Service continues to monitor the region, emphasizing the unpredictability of seismic events and the inability to predict future occurrences or assess the likelihood of larger earthquakes based on the current swarm.
Written by urgent.news from The City Paper Bogotá's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
