Popocatépetl (Central Mexico): Activity has remained essentially unchanged. Intermittent small to moderate explosions occur from the volcano’s summit crater, where slow magma extrusion continues to accumulate in a moderately viscous, flat dome.
An aerial survey on 10 April showed that the most recent dome seen in February (numbered 55) had partially collapsed, as a result of the explosions during late March to early April. Its remaining mass occupying the inner crater was flat and had developed a series of concentric fissures.
Reventador (Ecuador): Activity has been relatively intense during the past days. Frequent explosions with ash plumes of 1-2 km height and smaller pyroclastic flows have occurred from the summit vent, where a lava dome is growing.
Tungurahua (Ecuador): Intermittent mild explosive activity with ash emissions continues at the volcano.
An unusual seismic swarm occurred during the night of 9-10 April, following two volcanic earthquakes at 6 km depth in the evening. More than 1300 quakes were recorded until noon of 10 April. What made it unusual was that the seismic events were of the “drumbeat” type, not seen on Tungurahua during the past 16 years, but thought to correspond to the ascent of viscous magma.
Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Aso (Kyushu): intense strombolian activity from main vent in Nakadake crater (updated 27 Mar 2015)
Bagana (Bougainville Island, Papua New Guinea): ash emissions, lava dome growth (updated 2 Apr 2015)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 4 Nov 2014)
Colima (Western Mexico): Irregular small to moderately large explosions (updated 31 Mar 2015)
Copahue (Chile/Argentina): ash venting (updated 4 Dec 2014)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 7 Apr 2015)
Erebus (Antarctica): active lava lake in summit crater (updated 8 Dec 2014)
Erta Ale (Ethiopia): active lava lake in northern pit crater, active hornito with intermittend flow in southern crater (updated 11 Jan 2013)
Fuego (Guatemala): intermittent strombolian explosions (updated 13 Mar 2015)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 14 Nov 2014)
Karangetang (Siau Island, Sangihe Islands, Indonesia): growing lava dome, incandescent avalanches (updated 5 Feb 2015)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 3 Apr 2015)
Kilauea (Hawai’i): new lava flow from vents on NE flank of Pu’u ‘O’o (updated 13 Aug 2013)
Mount Olympus (Mars)
Nishino-shima (Volcano Islands, Japan): growing island (updated 19 Jan 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)
Poas (Costa Rica): phreatic explosions (updated 14 Oct 2014)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 3 Apr 2015)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): lava fountains, ash emissions from Tavurvur cone (updated 12 Sep 2014)
Raung (East Java): Large Strombolian explosions (updated 18 Mar 2015)
Reventador (Ecuador): intermittent weak to moderate explosions, occasional lava flows (updated 7 Apr 2015)
Sakurajima (Kyushu, Japan): ash venting, intermittent explosions (updated 27 Mar 2015)
Sangay (Ecuador): likely strombolian eruptions at summit crater (updated 13 Mar 2015)
Santiaguito (Guatemala): small explosions from the Caliente dome and active lava flow (updated 3 Feb 2015)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 26 Nov 2014)
Shiveluch (Kamchatka): growing lava dome (updated 3 Apr 2015)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 2 Apr 2015)
Soputan (North Sulawesi, Indonesia): active viscous lava flow, explosions, rockfalls, pyroclastic flows (updated 9 Mar 2015)
Suwanose-jima (Ryukyu Islands): strombolian activity (updated 16 Feb 2015)
Ubinas (Peru): continuous ash emissions (updated 9 Apr 2015)
Villarrica (Central Chile): pulsating gas and ash emissions (updated 3 Apr 2015)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 14 Aug 2013)
Zhupanovsky (Kamchatka, Russia): intermittent ash emissions (updated 3 Apr 2015)