(4.9 Mb) Apr 2026

Ensuring infrastructure can withstand rare but possible tremors.

Unlike events in California or Japan, which occur at plate boundaries, intracratonic earthquakes happen within the stable interior of a continent. They are much rarer but can be surprisingly damaging because the crust in these areas is often rigid and can transmit seismic waves over vast distances. 2. The Impact of the 2007 Event (4.9 MB)

Identifying where stress might be building within the South American Plate. Most earthquakes happen at the edges of tectonic

At a magnitude of , the quake was powerful enough to cause significant local concern. What is an "Intracratonic" Earthquake?

Most earthquakes happen at the edges of tectonic plates, where landmasses grind against or dive under one another. However, the 4.9 mb event in Minas Gerais serves as a critical case study for "intraplate" seismic activity. 1. What is an "Intracratonic" Earthquake?