Volcanoes Today, 1 Feb 2016: Nevados de Chillán Volcano, Masaya, Colima, Popocatépetl, Shiveluch

Vulcanian explosion at Colima this morning

Shiveluch (Kamchatka): Activity at the volcano seems to be increasing again. Constant glow and incandescent rockfalls at the active lava dome are visible on webcam imagery.
Based on satellite data, an eruption (explosion or pyroclastic flow) was reported this morning to have produced an ash plume that rose to 24,000 ft (7.3 km) altitude and drifted west.

Colima (Western Mexico): Intermittent explosions of varying size continue, producing ash plumes that rise 1-3 km above the volcano.

Masaya (Nicaragua): INETER reported ongoing strong seismic and surface activity. There here are currently two small lava lakes active contained in two pits inside the Santiago crater. Access to Masaya’s crater rim, a very popular tourist destination, was closed to the public on Saturday.
An earthquake of magnitude 3 on Friday, felt by many residents, probably accompanied the opening of the second vent in the NE section of the crater. A third vent is in the process of forming in the SE section of the crater, the latest INETER report stated.

Nevados de Chillán (Central Chile): A series of new explosions with small to moderate ash emissions occurred at the volcano during the end of last week. This activity formed a second new crater, approx. 25×30 m wide and located 50 m beneath the northeast flank of Arrau crater, as SERNAGEOMIN staff observed on an overflight on 30 January.
According to Chilean scientists, the activity is caused by phreatic (steam-driven) explosions in the shallow hydrotermal disturbances, not by fresh magma. Temperatures in the crater areas were found to be relatively low (approx 120 deg C), which supports this interpretation as well. It is likely that more explosions occur in the near future and an exclusion zone of 2 km around the crater was put in place.

Popocatépetl (Central Mexico): The volcano’s lava dome has filled the inner crater, CENAPRED observed during an overflight on 27 January. The high level of the dome explains the relatively strong glow visible at night.
According to CENAPRED, it is likely that small to moderate explosions in the coming days will destroy the dome again (as happened numerous times in the past during the current eruptive cycle of Popo).
During the past few days, activity has been at average to low levels with 2-5 small explosions that generated ash plumes dispersing into easterly directions.

Currently erupting:

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): strong ash emissions, incandescent ejections reported (updated 26 Jan 2016)
Colima (Western Mexico): intermittent vulcanian explosions (updated 29 Jan 2016)
Copahue (Chile/Argentina): seismic unrest, occasional ash venting (updated 13 Jan 2016)
Cotopaxi (Ecuador): vulcanian explosions (updated 16 Aug 2015)
Dukono (Halmahera): mild strombolian activity, continuous intense ash emissions (updated 28 Jan 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 20 Jan 2016)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 29 Oct 2015)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 28 Jan 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 3 Jan 2016)
Momotombo (Nicaragua): intermittent vulcanian explosions (updated 13 Jan 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 11 Nov 2015)
Sangay (Ecuador): likely strombolian eruptions at summit crater (updated 13 Mar 2015)
Santiaguito (Guatemala): intermittent explosions from Caliente dome, strong degassing (updated 13 Jan 2016)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 9 Nov 2015)
Shiveluch (Kamchatka): growing lava dome (updated 29 Jan 2016)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 16 Jan 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 22 Jan 2016)

Continue reading at Volcano Discovery: Volcanoes Today, 1 Feb 2016: Nevados de Chillán Volcano, Colima, Popocatépetl, ShiveluchMasaya

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