This Monday, January 26, 2015 at 6:43, the Chaparrastique was the seat of a small explosion, which generated an ash column quickly dispersed to the SW, where slight ash falls were reported on Piedra Azul. The explosion was accompanied by rumbling and vibration.
The air quality has changed somewhat, reaching an unhealthy level for the vulnerable: 0.2 <ppm <1.
MARN says that we should not approach the top of the volcano, because of the possibility of sudden explosions and gas emissions.
MARN – Ministerio de Medio ambiente y Recursos Naturales El Salvador.- link