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Volcanic activity worldwide 22 Apr 2015: Sakurajima volcano, Aso, Nevado del Ruiz

Wednesday Apr 22, 2015 21:00 PM |

Ash plume from Nevado del Ruiz Monday afternoon (INGEOMINAS)
Ash plume from Nevado del Ruiz Monday afternoon (INGEOMINAS)
Aso (Kyushu): Mild strombolian activity with low-level ash emissions continue from the Nakadake crater.

Sakurajima (Kyushu, Japan): The volcano has been very active recently. Vulcanian-type explosions have been frequent (2-8 per day) and often relatively large.
On 15 April, at least 8 explosions occurred, the largest of which produced ash plumes that rose to 15,000 ft (4.5 km altitude), i.e. 3.5 km above the volcano's summit.

Nevado del Ruiz (Colombia): Activity at the volcano has increased during the past week. Accompanied by elevated seismic activity, ash emissions have been occurring since 14 April. The strongest phase of activity was on 19 April, when ash plumes rose to estimated 900 meters above the summit.
The Ingeominas volcano observatory in Manizales reported a change in seismicity detected since 12 April, when an increase in volcanic-tectonic (rock-fracturing) signals was detected, signs of pressurization and possible magma intrusion at depth.

Volcano Activity Summary for 22 Apr 2015:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Aso (Kyushu): intense strombolian activity from main vent in Nakadake crater (updated 22 Apr 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 20 Apr 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 13 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 pyroclastic flows (updated 13 Apr 2015)
Sakurajima (Kyushu, Japan): ash venting, intermittent explosions (updated 22 Apr 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)
Stromboli (Eolian Islands, Italy): weak strombolian activity at summit vents (updated 16 Apr 2015)
Suwanose-jima (Ryukyu Islands): strombolian activity (updated 16 Feb 2015)
Tungurahua (Ecuador): volcanic unrest, ash emissions, degassing (updated 20 Apr 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)

Eruption warning / minor activity:

Augustine (Cook Inlet (SW Alaska))
Bezymianny (Central Kamchatka Depression): steaming, weak seismic activity (updated 3 Jul 2014)
Etna (Sicily, Italy): sporadic weak ash emissions from New SE crater (updated 19 Apr 2014)
Heard (Australia, Southern Indian Ocean): possibly lava lake in summit crater (updated 5 Dec 2014)
Kavachi (Solomon Islands): no eruption since 2007 (updated 16 Jun 2014)
Kerinci (Sumatra): seismic unrest (updated 5 Jun 2013)
Kirishima (Kyushu): degassing, alert lowered (updated 25 Oct 2014)
Kliuchevskoi (Kamchatka): degassing, probably mild strombolian activity in summit crater (updated 14 Apr 2015)
Krakatau (Sunda Strait, Indonesia): degassing (updated 31 Mar 2014)
Kuchinoerabu-jima (Ryukyu Islands): steaming, incandescence at main crater (updated 27 Mar 2015)
Lokon-Empung (North Sulawesi, Indonesia): small explosions, lava flow? (updated 13 Sep 2014)
Lopevi (Vanuatu): eruption warning (updated 16 Dec 2014)
Manam (Papua New Guinea): seismic unrest (updated 20 Mar 2015)
Mayon (Luzon Island): steaming (updated 18 Dec 2014)
Nevado del Ruiz (Colombia): intermittent ash emissions, seismic unrest (updated 22 Apr 2015)
Nyamuragira (DRCongo): active lava lake (updated 29 Nov 2014)
Ontake-san (Honshu): steaming, low seismic activity (updated 18 Dec 2014)
Pacaya (Guatemala): ash emissions (updated 7 Feb 2015)
Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013)
Pavlof (Alaska Peninsula, USA): steaming, elevated seismic activity (updated 22 Dec 2014)
Piton de la Fournaise (La Réunion): new eruption on 4 Feb 2015 (updated 16 Feb 2015)
Rasshua (Central Kuriles)
Rincón de la Vieja (Costa Rica): phreatic explosions from crater lake (updated 21 Sep 2014)
Sacabaya (Northern Chile, Bolivia and Argentina)
San Cristobal (Nicaragua): possible ash emission on 11 April (updated 9 Mar 2015)
San Miguel (El Salvador): elevated seismic activity, pulsating gas emissions (updated 28 Jan 2015)
Shishaldin (United States, Aleutian Islands): mild explosive activity, intermittent more intense phases (updated 3 Apr 2015)
Slamet (Central Java): intense strombolian explosions (updated 12 Jan 2015)
Turrialba (Costa Rica): sporadic, mild to moderate ash emissions (updated 7 Apr 2015)
Ulawun (New Britain, Papua New Guinea): degassing, ash venting (updated 5 Aug 2013)

Vorig nieuws
Lava flow on Fuego early on 18 April 2015
Monday, Apr 20, 2015
Fuego (Guatemala): A more intense phase of activity with the effusion of a 2 km long lava flow on the southeastern slope into the Taniluya canyon occurred during 17-18 April. ... [meer...]
Strombolian eruption at Stromboli on 10 April (INGV)
Thursday, Apr 16, 2015
Stromboli (Eolian Islands, Italy): (16 Apr) During the past week, activity at the volcano has picked up and resumed to its typical normal strombolian activity - good news for all who are going to visit the island during the starting tourist season. ... [meer...]
Epicenters of recent earthquakes south of Hekla
Tuesday, Apr 14, 2015
Hekla (Iceland): Small earthquake swarms occurred at shallow depths during the past days near the volcano. The quakes were located approx. 6-10 km south of Hekla volcano and at shallow depths around 5 km. ... [meer...]
Aerial view of Popo's crater on 10 April with the partially collapsed lava dome (CENAPRED)
Monday, Apr 13, 2015
Popocatépetl (Central Mexico): (13 Apr) 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. ... [meer...]
Ash emission from Bocca Nuova (Montagnola thermal webcam, INGV Catania)
Sunday, Apr 12, 2015
Etna (Sicily, Italy): A short sequence of seismo volcanic events occurred a few hours ago ended with two ash explosions at the Bocca Nuova Crater. ... [meer...]

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