On Monday, scientists registered 335 seismic events, followed by five low-intensity volcanic explosions at 4:16 p.m. local time. Some gases and ash were emitted in the explosions.
Despite the explosions, the Peruvian Geophysical Institute said the volcano is unlikely to suddenly erupt. Rather, IGP has noted an increased presence of magma, or molten rock, at the volcano's crater. Such lava moves very slowly but cools and hardens quickly.
Residents have been given masks and protective glasses.
The volcano is approximately 70 kilometers from Arequipa.