Stromboli (Eolian Islands, Italy): Lava continues to flow from the effusive vent under the NE crater and forms several active branches on the upper Sciara del Fuoco.
When observed last evening, the most advanced flow fronts were at 500-550 m elevation. Near-constant glowing rockfalls detach from the lava flows, sometimes reaching the lower parts of the Sciara.
Occasional ash emissions, sometimes with audible detonations occurred from the western vent at the summit craters.
Bardarbunga (Iceland): The eruption and seismic activity at the Holuhraun fissure continue with little variation. The Baardarbunga caldrta continues to subside at approx. 50 cm a day, accompanied by frequent earthquakes. Two magnitude 5.0 and 5.5 events yesterday were associated with a drop of the floor by approx. 60 cm alone!
IMO wrote: “Seismic activity around Bárðarbunga, and volcanic activity at the eruption site at Holuhraun, has been comparable to recent days.
Seismicity is low in the dyke intrusion; since the last report at 07:00 this morning around 15 earthquakes have been detected in the northern part of the dyke (less than 20 since midnight) and the strongest one was magnitude 1.1.
About 25 earthquakes have been detected around the Bárðarbunga caldera rim during the last 12 hours (40 since midnight), the strongest event there was magnitude 5.5 at 10:22 on the southeastern rim (and since midnight a 5.0 earthquake on the northwestern rim at 03:51 must be included). Additionally, eight more earthquakes exceeded magnitude 3 since 07:00 (11 since midnight).
Copahue (Chile/Argentina): A new phase of ash emissions began on the evening of 4 Oct. The volcano started to emit near continuous ash plumes, interrupted by strong degassing phases, from the active El Agrio crater. Seismic activity according to SERNAGEOMIN has been low suggesting that the origin of the new eruptions is phreatic, i.e. driven by steam explosions rather than fresh magma rising to the surface.
No incandescence has been observed, a further sign that the temperature is relatively low, typical for phreatic activity, and no thermal signal is visible on satellite data.
Copahue volcano started a phase of unrest in late 2012 with seismic swarms and increased degassing. Its alert level was lowered back to Green in April 2013, but activity picked up shortly again, in May, and increased to the point that a magmatic eruption was considered a possibility. Volcanic alert level was raised to red, along with evacuations as precaution.
Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Bagana (Bougainville Island, Papua New Guinea): ash emissions, lava dome growth (updated 24 Sep 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 1 Oct 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 1 Oct 2014)
Ibu (Halmahera, Indonesia): growing lava dome, occasional ash emissions (updated 28 Jul 2014)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 4 Oct 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 1 Oct 2014)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 21 Sep 2014)
Shiveluch (Kamchatka): growing lava dome, incandescent avalanches, occasional explosions (updated 24 Sep 2014)
Sinabung (Sumatra, Indonesia): continuing slow lava extrusion, occasional rockfalls and pyroclastic flows (updated 5 Oct 2014)
Slamet (Central Java): intense strombolian explosions (updated 13 Sep 2014)
Stromboli (Eolian Islands, Italy): lava flow effusion on Sciara del Fuoco, occasional strombolian explosions (updated 4 Oct 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 25 Sep 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 24 Sep 2014)