On Sunday, a 3.1 magnitude earthquake struck near the municipality of Cocalinho, located 780 kilometers from Cuiabá, Brazil. The announcement was made on Tuesday by the Brazilian Seismographic Network (RSBR) after analysis from the Seismology Center at the University of São Paulo (USP). According to local authorities, including Cocalinho's mayor, Márcio Baco, the population did not feel the earthquake, as initial reports did not indicate any sensation of the tremor within the town.

The earthquake occurred at approximately 10:16 PM and the city of Cocalinho has a population of 6,220, based on the latest census from the Brazilian Institute of Geography and Statistics (IBGE). The previous seismic activity in the state was noted on January 20, with a minor tremor of 2.1 registered in the Barão de Melgaço area, also in the Pantanal region of Brazil. These low-magnitude tremors are relatively common in the region and often occur almost weekly, as explained by seismic experts in the region.

Seismologists emphasize that earthquakes of this scale typically do not pose significant risks to the population, and they often go unnoticed by local residents, which was the case in Cocalinho. The consistent monitoring by networks such as RSBR helps ensure public safety and awareness regarding seismic activities in Brazil, especially in regions where such occurrences are frequent. This incident, although minor, contributes to the existing dialogue on earthquake preparedness in Brazil and the need for continued education on seismic events in affected areas.