(4.9 Mb) Apr 2026

At a magnitude of , the quake was powerful enough to cause significant local concern.

The epicenter was near Itacarambi, in the São Francisco Craton area. (4.9 MB)

The "mb" in 4.9 mb stands for . This scale measures the P-waves (primary waves) that travel through the interior of the Earth. It is specifically useful for deep-focus earthquakes or those occurring at distances where other scales might be less accurate. 4. Why This Matters Today At a magnitude of , the quake was

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 This scale measures the P-waves (primary waves) that

Identifying where stress might be building within the South American Plate.

It was one of the first times an earthquake in this specific region was documented with such precision, helping geologists map hidden fault lines beneath the Brazilian soil. 3. Understanding the "mb" Scale