Hydrothermal unrest persists at El Chichón volcano, Mexico

Hydrothermal unrest at El Chichón volcano in northern Chiapas, Mexico, has persisted since mid-2025, characterized by elevated seismicity, chemical-physical changes in the crater lake, and increased gas emissions. National and academic monitoring institutions report no evidence of magma ascent, and current conditions do not indicate an imminent eruption. The volcano remains at Yellow Alert. Source