SERNAGEOMIN reported that lava began breaching the rim of Nevados de Chillán?s Nicanor Crater around 27 June and had flowed 40 m down the N flank by 1 July.
An explosion at 0837 on 6 July generated a gas-and-ash plume that rose 1.2 km above the crater rim and drifted SE.
The Alert Level remained at Yellow, the second lowest level on a four-color scale, and residents were reminded not to approach the crater within 3 km.
ONEMI stated that Alert Level Yellow (the middle level on a three-color scale) remained in place for the communities of Pinto and Coihueco, noting that as of 16 June the public should stay at least 3 km away from the crater on the SW flank and 5 km away on the NE flank.
Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI) ,Servicio Nacional de Geología y Minería (SERNAGEOMIN)