Volcanoes Today, 11 Mar 2016: Sangay Volcano, Nevado del Ruiz

Eruption of Nevado del Ruiz yesterday afternoon

Source: Volcano Discovery

Nevado del Ruiz (Colombia): A series of small explosions occurred at the volcano yesterday. The first happened in the afternoon at 16:32 local time. The Manizales volcano observatory recorded a pulse in tremor and reported an ash plume that rose 1300 m above the summit.
Similar explosions with ash emissions could be seen on webcam images at 18:15 and 18:40 (local time), before night obscured the view. No incandescence is visible from the crater.
Light ash fall probably occurred in areas to the SW belonging to the departments of Quindío, Risaralda and Caldas.

Sangay (Ecuador): The Geophysical Institute (IGEPN) reported an increase in activity from the volcano since 5 March, when volcanic earthquakes started to become more frequent in number.
Between 8 and 9 March, this activity picked up significantly and signs of small explosions (11 in total since 7 March) as well as small episodes of tremor appeared. This probably means that new magma has arrived to produce strombolian activity in the summit crater. A thermal anomaly visible on satellite data fits this interpretation well.

Currently erupting:

Alaid (Northern Kuriles): thermal hot spot visible on satellite imagery (updated 4 Mar 2016)
Ambrym (Vanuatu): active lava lakes in several craters (updated 18 Feb 2016)
Aso (central Kyushu, Japan): steaming, occasional phreatomagmatic or strombolian explosions (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)
Colima (Western Mexico): intermittent vulcanian explosions (updated 1 Mar 2016)
Dukono (Halmahera): mild strombolian activity, continuous intense ash emissions (updated 9 Mar 2016)
Erebus (Antarctica): active lava lake in summit crater (updated 8 Dec 2014)
Erta Ale (Danakil depression, Ethiopia): overflowing lava lake (updated 2 Mar 2016)
Fuego (Guatemala): lava flows on S and W flanks, lava fountaining from summit vent (updated 3 Mar 2016)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 29 Oct 2015)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 1 Mar 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)
Masaya (Nicaragua): active lava lake in summit crater since mid Dec 2015 (updated 4 Mar 2016)
Momotombo (Nicaragua): intermittent vulcanian explosions (updated 8 Mar 2016)
Nevado del Ruiz (Colombia): intermittent ash emissions, strong degassing (updated 4 Mar 2016)
Nyiragongo (DRCongo): new vent on crater floor (updated 8 Mar 2016)
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 3 Mar 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 24 Feb 2016)
Sakurajima (Kyushu, Japan): seismic swarm, eruption warning (updated 1 Mar 2016)
Sangay (Ecuador): likely strombolian eruptions at summit crater (updated 13 Mar 2015)
Santiaguito (Guatemala): intermittent explosions from Caliente dome, strong degassing (updated 9 Mar 2016)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 14 Feb 2016)
Shiveluch (Kamchatka): growing lava dome (updated 6 Mar 2016)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 9 Mar 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 8 Mar 2016)
Tungurahua (Ecuador): large and frequent explosions, ash columns rising several km (updated 9 Mar 2016)
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: Volcanoes Today, 11 Mar 2016: Sangay Volcano, Nevado del Ruiz

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