Between November 16th-18th and November 21st-23rd, both the satellite and webcam images signal diffuse gas and ash emissions at Copahue, located on the Chile-Argentina border.
These plumes are produced by low strombolian explosions presumably from a pyroclastic cone located on the floor of the El Agrio crater. They climb to altitudes between a few hundred meters and 3,600 m.
The alert of Copahue remains in Amarilla, accompanied by a forbidden zone of 1,500 meters around the crater. According to the Sernageomin, the volcano has low internal energy, and in the standards of the alert stage. He recalled that emissions of gases and ash have been sporadic since 2012. The most affected sector is Argentinian, and centered on the city of Cavihue in the province of Neuquén.
Sources: Sernageomin & GVP weekly report
The volcanological observatory of Hawaii reports a new breakout of lava (overflow of a tunnel lava) to the vent of episode 61g on the eastern flank of Pu'u O'o this 21 November around 8:40 local. Lava flows emanate to the south and north-east and are still active on 22.11, in the 500 meters around the vent, as well as the sea entrance to Kamokuna.
Sources: HVO / USGS & Big island news
Lava from tne new 61g breakout on 22 / 18h10 and 23.11.2016 / 6h15 - one click to enlarge - Webcams HVO
The source of the raft of pumice found in the Pacific, west of Minerva Reef southwest of Tonga, by a Royal New Zealand Air Force aircraft on 16 November, was still unidentified.
The pumice is in long ribbons, 10 km long on tens to hundreds of meters wide according to satellite images, suggesting an action of sea currents and weather on its surface.
The area where the pumice raft was seen is bordered by volcanic arcs: Vanuatu to the north, Tonga arc to the east, and the Kermadec arc to the southeast.
Sources: GeoNet and Wired / eruption blog