SERNAGEOMIN reported that during 26 November-3 December white-to-gray plumes from Nevados de Chillán?s Nicanor Crater rose as high as 1.7 km above the rim and drifted SE, NE, and NNW.
Occasional explosions ejecting incandescent material onto the flank were visible at night.
The report noted that the newest lava flow (L4) traveled down the NNE flank adjacent to three previous flows (L1, L2, and L3).
The point of emission of L4 was about 60 m SSE of the emission point for the previous three lava flows.
L4 had two lobes and was about 90 m long, measured from the rim of Nicanor Crater, on 27 November.
By 29 November it had lengthened to 165 m.
The volcano Alert Level remained at Orange, the second highest level on a four-color scale.
ONEMI maintained an Alert Level Yellow (the middle level on a three-color scale) for the communities of Pinto, Coihueco, and San Fabián, and stated that the public should stay at least 3 km away from the crater on the SW flank and 5 km away on the ENE flank.
Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)