On January 20, 2024, Brazil experienced the most significant earthquake in its history, with a magnitude of 6.6 on the Richter Scale.
This unprecedented seismic event was centered in the country’s northern region, affecting areas in Acre and Amazonas but, remarkably, resulted in no reported damage.
The quake struck at a depth of 614.5 kilometers, allowing for the dissipation of energy, which likely minimized its impact on the surface.
This depth is notable as it is uncommon for quakes of such magnitude to occur so deep, which might explain the lack of damage despite the significant strength of the tremor.
The United States Geological Survey and the China Earthquake Networks Center both recorded the event, marking a historic moment for the country.
The Brazilian Seismographic Network RSBR highlighted the quake’s occurrence near the border with Peru, attributing the seismic activity to the subduction of the Nazca Plate beneath the South American Plate.
This geological process is common in regions close to the Andean Mountains, one of the most seismically active zones on the planet.
No reported damage
Historically, the area has experienced about 96 seismic events within a 250-kilometer radius of Tarauacá over the past 45 years, none of which had serious consequences.
Before this event, the most significant earthquake recorded in Brazil occurred in the Serra do Tombador region, Mato Grosso, on January 31, 1955, with a magnitude of 6.2 on the Richter Scale.
This recent earthquake sets a new record for Brazil and highlights the importance of understanding and preparing for seismic activity even in regions not traditionally associated with such natural events.
The deep origin of the quake serves as a reminder of the complex and dynamic nature of Earth’s geology, particularly in areas near major tectonic boundaries like the Andes.
Despite the absence of damage, the event is a significant addition to the historical and scientific study of seismic activity in Brazil and South America.