Bardarbunga (Iceland): The eruption continues with most activity (lava fountains and lava flow emission) now occurring from the central vent on the Holuhraun fissure.
Seismic activity remains elevated, mostly under the northern rim of the caldera of the central Bárdarbunga volcano, but also under Herðubreið and the northern part of the intrusion.
A slight increase in earthquake activity under the caldera can be seen over the past days. The 4 strongest events today so far were between magnitude 3.4 and 4.8, all under the Bárdarbunga caldera, which continues to subside.
Semeru (East Java, Indonesia): Our recent tour group on Java observed mild ongoing strombolian activity in the volcano’s summit crater.
A flat lava dome is growing there and extruding a viscous lava flow into the open ravine to the south flank.
Colima (Western Mexico): The volcano’s activity has picked up again recently. A new viscous lava flow has started to descend on the volcano’s SW flank.
The lava flow is being formed as the cake-like lava dome overspills the rim of ths summit crater. Sometimes, it generates small incandescent avalanches.
Rincón de la Vieja (Costa Rica): The volcano increased its activity. Since 17 Sep, phreatic explosions have regularly occurred from the main crater which contains an acid lake. Although none was observed directly, at least 6 explosions could be identified by seismic signals. An aerial survey yesterday showed no fresh deposits, which suggests that the eruptions were rather small and did not eject material beyond the lake.
Park rangers have also observed that the volcano is currently having some increased activity: strong bubbling at the lake and floating sulfur rafts on the surface. The water temperature has increased significantly by 15 deg C., compared to measurements made in 2013.
The main hazard from the volcano at present would be hot, acid mud flows (lahars) if larger explosions cause the lake to drain or eject larger quantities of water. Such lahars could affect all sides of the volcano, but the areas to the NE around the Azul and Pénjamo river beds would be most at risk. During previous eruptions such in 1995, they had been affected by lahars already.
Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Bagana (Bougainville Island, Papua New Guinea): ash emissions, lava dome growth (updated 27 Aug 2014)
Bardarbunga (Iceland): Ongoing northward migration of seismic activity (updated 18 Sep 2014)
Barren Island (Indian Ocean): intermittent activity, likely strombolian-type and/or lava flows (updated 4 Feb 2014)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 27 Aug 2014)
Colima (Western Mexico): new lava flow on SW flank (updated 21 Sep 2014)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 5 Sep 2014)
Erebus (Antarctica): active lava lake in summit crater (updated 21 Jan 2012)
Erta Ale (Ethiopia): active lava lake in northern pit crater, active hornito with intermittend flow in southern crater (updated 11 Jan 2013)
Fuego (Guatemala): strombolian explosions from summit crater, intermittent lava flows (updated 12 Sep 2014)
Ibu (Halmahera, Indonesia): growing lava dome, occasional ash emissions (updated 28 Jul 2014)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 10 Sep 2014)
Kilauea (Hawai’i): new lava flow from vents on NE flank of Pu’u ‘O’o (updated 13 Aug 2013)
Manam (Papua New Guinea): degassing, occasional ash venting (updated 28 Aug 2013)
Marapi (Western Sumatra, Indonesia): sporadic explosions (updated 27 Mar 2014)
Nishino-shima (Volcano Islands, Japan): lava effusion enlarging the new island (updated 12 Sep 2014)
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)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): lava fountains, ash emissions from Tavurvur cone (updated 12 Sep 2014)
Reventador (Ecuador): ash emissions, explosions (updated 19 Aug 2014)
Sakurajima (Kyushu, Japan): ash venting, intermittent explosions (updated 10 Sep 2014)
Sangeang Api (Indonesia): growing lava dome & lava flow (updated 7 Jul 2014)
Santiaguito (Guatemala): generation of hot lahars (updated 12 Sep 2014)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 21 Sep 2014)
Shishaldin (United States, Aleutian Islands): small lava lake in summit crater (updated 14 Aug 2014)
Shiveluch (Kamchatka): growing lava dome, incandescent avalanches, occasional explosions (updated 7 Jul 2014)
Sinabung (Sumatra, Indonesia): effusion of viscous lava, steaming, ash emissions (updated 15 Jul 2014)
Slamet (Central Java): intense strombolian explosions (updated 13 Sep 2014)
Stromboli (Eolian Islands, Italy): decreasing lava effusion and occasional small explosions at summit (updated 17 Sep 2014)
Suwanose-jima (Ryukyu Islands): strombolian activity in summit crater (updated 10 Sep 2014)
Tungurahua (Ecuador): moderate to strong strombolian explosions from central crater (updated 31 Aug 2014)
Ubinas (Peru): degassing, sporadic small explosions and ash venting (updated 11 Sep 2014)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 14 Aug 2013)
Zhupanovsky (Kamchatka, Russia): intermittent ash emissions (updated 11 Sep 2014)