Sinabung (Sumatra, Indonesia): Explosions from the summit crater continue to occur intermittently. An eruption in the evening (18:24 local time) of 12 Feb produced an ash plume that rose approx. 2 km above the summit.
Semeru (East Java, Indonesia): A pyroclastic flow (hot avalanche of fragmented volcanic material) occurred on the volcano’s southern side yesterday morning, reaching 4.5 km length and producing an ash plume that rose to 26,000 ft (8 km) altitude. Darwin VAAC raised the aviation color code to RED.
Another, smaller flow seems to have occurred today.
The pyroclastic flow(s) were probably caused by sudden collapse of accumulated lava on the steep upper flank – inside the volcano’s breached summit crater, a flat lava dome has been growing steadily during the past months and overspilling as viscous flow into the upper part of the ravine.
Dukono (Halmahera): The volcano continues to produce mild to moderate, but near-continuous ash emissions.
Darwin VAAC reported an ash plume at estimated 10,000 ft (3 km) altitude extending 55 nautical miles to the NE this morning.
Momotombo (Nicaragua): Another explosion occurred at the volcano yesterday at 10:40 local time. It produced a pyroclastic flow that descended the NE flank through the prominent ravine that also had channeled the recent lava flow from 2015.
The pyroclastic flow, surrounded by yellow-brown ash, was likely the result of collapse of older material at the crater during the explosion. Whether and in which proportion fresh magma is involved in the current activity is difficult to say without an analysis of the ash.
Glow continued to be visible at the crater during the night, suggesting that temperatures have increased and maybe magma is now at least close to the vents.
Ambrym (Vanuatu): active lava lakes in several craters (updated 24 May 2015)
Aso (Kyushu): steaming, occasional phreatomagmatic or strombolian explosions (updated 26 Oct 2015)
Bagana (Bougainville Island, Papua New Guinea): mild ash emissions (updated 26 Oct 2015)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 28 Nov 2015)
Bromo (East Java, Indonesia): intermittent ash-rich explosions, ash venting (updated 8 Feb 2016)
Colima (Western Mexico): intermittent vulcanian explosions (updated 12 Feb 2016)
Cotopaxi (Ecuador): vulcanian explosions (updated 16 Aug 2015)
Dukono (Halmahera): mild strombolian activity, continuous intense ash emissions (updated 14 Feb 2016)
Erebus (Antarctica): active lava lake in summit crater (updated 8 Dec 2014)
Erta Ale (Danakil depression, Ethiopia): overflowing lava lake (updated 18 Jan 2016)
Fuego (Guatemala): lava flows on S and W flanks, lava fountaining from summit vent (updated 10 Feb 2016)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 29 Oct 2015)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 10 Feb 2016)
Kilauea (Hawai’i): new lava flow from vents on NE flank of Pu’u ‘O’o (updated 28 Apr 2015)
Kliuchevskoi (Kamchatka): ash emissions, weak strombolian activity (updated 11 May 2015)
Manam (Papua New Guinea): large explosion on 31 July 2015 (updated 31 Aug 2015)
Masaya (Nicaragua): active lava lake in summit crater since mid Dec 2015 (updated 1 Feb 2016)
Momotombo (Nicaragua): intermittent vulcanian explosions (updated 14 Feb 2016)
Nevado del Ruiz (Colombia): intermittent ash emissions, strong degassing (updated 21 Sep 2015)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 26 Feb 2014)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Pacaya (Guatemala): intense spattering from intra-crater cone (updated 13 Jan 2016)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 29 Jan 2016)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): lava fountains, ash emissions from Tavurvur cone (updated 12 Sep 2014)
Reventador (Ecuador): lava flow on SW flank (updated 17 Aug 2015)
Sakurajima (Kyushu, Japan): seismic swarm, eruption warning (updated 12 Feb 2016)
Sangay (Ecuador): likely strombolian eruptions at summit crater (updated 13 Mar 2015)
Santiaguito (Guatemala): intermittent explosions from Caliente dome, strong degassing (updated 5 Feb 2016)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 14 Feb 2016)
Shiveluch (Kamchatka): growing lava dome (updated 29 Jan 2016)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 14 Feb 2016)
Soputan (North Sulawesi, Indonesia): strong eruption 4-6 Jan 2016 (updated 6 Feb 2016)
Stromboli (Eolian Islands, Italy): weak strombolian activity at summit vents (updated 16 Apr 2015)
Suwanose-jima (Ryukyu Islands): strombolian explosions in Ontake crater (updated 1 Oct 2015)
Tungurahua (Ecuador): intermittent small ash emissions, small to moderate explosions (updated 21 Nov 2015)
Ubinas (Peru): sporadic vulcanian explosions (updated 16 Jan 2016)
Villarrica (Central Chile): small lava lake in summit crater (updated 12 May 2015)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 13 Nov 2015)
Zhupanovsky (Kamchatka, Russia): occasional explosions and ash emissions (updated 14 Feb 2016)
Continue reading at Volcano Discovery: Volcanic activity worldwide 15 Feb 2016: Semeru volcano, Dukono, Sinabung, Momotombo