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Volcanic activity worldwide 4 May 2016: Sangay volcano, Sinabung, Bristol Island

Wednesday May 04, 2016 23:00 PM |

Heat signal from Sangay volcano (MIROVA)
Heat signal from Sangay volcano (MIROVA)
Gas and steam plume from Bristol volcano (Landsat 8 image, annotated by Culture Volcan)
Gas and steam plume from Bristol volcano (Landsat 8 image, annotated by Culture Volcan)
Sinabung (Sumatra, Indonesia): No significant changes in activity have occurred recently. The volcano continues to produce occasional small to moderate vulcanian-type explosions, at rates of typically one or two per day, with ash plumes that rise 1-1.5 km above the crater.
Our friend and film-maker Michael Dalton who is on site reported that the recent explosions and collapses have destroyed a significant part of the volcano's lava dome.

Sangay (Ecuador): Mild explosive (strombolian-type) activity continues at the volcano, producing small ash plumes that are sometimes spotted by Washington VAAC.
A moderate thermal anomaly continues to be visible on satellite data, and small explosion signals show up on the seismic recording.

Bristol Island (United Kingdom, South Sandwich Is): A new volcanic eruption is occurring at the remote island, recent satellite imagery reveals.
Since late April, a thermal hot spot could be detected originating the volcano's summit, and clear-weather views showed a significant plume of gas and steam, possibly containing volcanic ash, drifting from the volcano. The volcano's last known activity was in 1956. However, without closer observation is difficult to know what type of activity is going on.
Two earthquakes of magnitudes around 5.6 and 4.7 were detected to have occurred near the island on 24 and 25 April; they are likely in relation with the new activity.

Volcano Activity Summary for 4 May 2016:

Currently erupting:

Alaid (Northern Kuriles): intense thermal signal from summit crater, strong degassing (updated 20 Apr 2016)
Ambrym (Vanuatu): active lava lakes in several craters (updated 18 Feb 2016)
Aso (central Kyushu, Japan): degassing, sporadic steam / ash explosions (updated 8 Mar 2016)
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)
Bristol Island (United Kingdom, South Sandwich Is): new eruption since late April 2016 (updated 4 May 2016)
Chikurachki (Paramushir Island): new eruption since end of March 2016 (updated 31 Mar 2016)
Colima (Western Mexico): sporadic small explosions (updated 31 Mar 2016)
Copahue (Chile/Argentina): seismic unrest, occasional ash venting (updated 22 Mar 2016)
Dukono (Halmahera): mild strombolian activity, continuous intense ash emissions (updated 20 Apr 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 13 Apr 2016)
Ibu (Halmahera, Indonesia): stromolian and phreatomagmatic explosions (updated 29 Oct 2015)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 1 Mar 2016)
Kerinci (Sumatra): intermittent ash emissions (updated 14 Apr 2016)
Kilauea (Hawai'i): new lava flow from vents on NE flank of Pu'u 'O'o (updated 28 Apr 2015)
Kliuchevskoi (Kamchatka): mild strombolian activity in summit crater (updated 27 Apr 2016)
Masaya (Nicaragua): active lava lake ini summit crater (updated 22 Apr 2016)
Momotombo (Nicaragua): intermittent vulcanian explosions (updated 29 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 29 Mar 2016)
Popocatépetl (Central Mexico): degassing, sporadic explosions, slowly growing lava dome (updated 20 Apr 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): sporadic vulcanian explosions from Minamidake and Showa crater (updated 14 Apr 2016)
Sangay (Ecuador): mild strombolian activity in summit crater (updated 4 May 2016)
Santiaguito (Guatemala): increased effusive / explosive activity from Caliente dome (updated 22 Apr 2016)
Semeru (East Java, Indonesia): growing lava dome, lava flow, strombolian activity (updated 14 Feb 2016)
Shiveluch (Kamchatka): growing lava dome (updated 31 Mar 2016)
Sinabung (Sumatra, Indonesia): continuing pyroclastic flows (updated 4 May 2016)
Stromboli (Eolian Islands, Italy): weak, intermittent strombolian explosions (updated 31 Mar 2016)
Suwanose-jima (Ryukyu Islands): strombolian explosions in Ontake crater (updated 20 Apr 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): lava lake in summit crater, spattering, strombolian explosions (updated 4 Apr 2016)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 13 Nov 2015)
Zhupanovsky (Kamchatka, Russia): steaming / degassing (updated 31 Mar 2016)

Eruption warning / minor activity:

Bagana (Bougainville Island, Papua New Guinea): mild ash emissions (updated 3 Mar 2016)
Barren Island (Indian Ocean): weak thermal hot spot (updated 3 Mar 2016)
Bezymianny (Central Kamchatka Depression): steaming, weak seismic activity (updated 3 Jul 2014)
Bromo (East Java, Indonesia): degassing, mild ash venting (updated 4 Apr 2016)
Bulusan (Luzon Island, Philippines): occasional sporadic explosions (updated 23 Feb 2016)
Canlaon (Central Philippines): occasional sporadic explosions (updated 30 Mar 2016)
Cerro Negro (Nicaragua): increased earthquake activity (updated 16 Feb 2016)
Chirinkotan (Northern Kuriles, Russia): sporadic ash emissions (updated 28 Jul 2015)
Chirpoi (Kurile Islands, Russia): thermal hot spot visible on satellite imagery (updated 14 Apr 2016)
Cotopaxi (Ecuador): vulcanian explosions (updated 16 Aug 2015)
Etna (Sicily, Italy): weak, dilute ash emissions from NE crater (updated 19 Apr 2014)
Heard (Australia, Southern Indian Ocean): strombolian activity, lava flow from Mawson Peak summit crater (updated 1 Feb 2016)
Karangetang (Siau Island, Sangihe Islands, Indonesia): rockfalls, glowing lava dome (updated 13 Jan 2016)
Kavachi (Solomon Islands): no eruption since 2007 (updated 16 Jun 2014)
Kick 'em Jenny (West Indies, Grenada): volcanic unrest, eruption warning (updated 24 Jul 2015)
Krakatau (Sunda Strait, Indonesia): steaming, seismic unrest (updated 15 Nov 2015)
Kuchinoerabu-jima (Ryukyu Islands): large explosive eruption on 29 May 2015 (updated 27 Mar 2015)
Langila (New Britain, Papua New Guinea): intermittent ash emissions (updated 22 Apr 2016)
Lascar (Northern Chile): sudden explosion on 30 Oct 2015 (updated 31 Oct 2015)
Lokon-Empung (North Sulawesi, Indonesia): seismic unrest, eruption warning (updated 9 Mar 2016)
Lopevi (Vanuatu): eruption warning (updated 16 Dec 2014)
MacDonald (Austral Islands,  ): steaming observed (updated 6 Feb 2016)
Manam (Papua New Guinea): large explosion on 31 July 2015 (updated 4 Mar 2016)
Mayon (Luzon Island, Philippines): steaming (updated 18 Dec 2014)
Merapi (Central Java, Indonesia): sporadic phreatic explosions (updated 21 Aug 2015)
Michael (United Kingdom, South Sandwich Is): unspecified activity detected as hot spot on satellite data (updated 3 Oct 2015)
Nevado del Ruiz (Colombia): intermittent explosions, steaming, ash venting (updated 24 Apr 2016)
Nevados de Chillán (Central Chile): sporadic ash emissions, seismic unrest (updated 20 Apr 2016)
Nyamuragira (DRCongo): lava lake in summit crater disappeared in early April 2016 (updated 16 Apr 2016)
Ontake-san (Honshu): steaming, low seismic activity (updated 18 Dec 2014)
Papandayan (West Java): steaming (updated 6 May 2013)
Poas (Costa Rica): phreatic explosions (updated 14 Oct 2014)
Rasshua (Central Kuriles)
Raung (East Java): intra-caldera eruption with lava flow and strombolian activity (updated 27 Aug 2015)
Rincón de la Vieja (Costa Rica): occasional explosions from the crater lake (updated 3 Apr 2016)
Sabancaya (Peru): steaming, elevated seismic activity (updated 11 Oct 2015)
Sacabaya (Northern Chile, Bolivia and Argentina)
San Cristobal (Nicaragua): intermittent ash explosions (updated 24 Apr 2016)
San Miguel (El Salvador): intermittent ash emissions (updated 15 Jan 2016)
Sangeang Api (Indonesia): weak lava extrusion from summit crater (updated 11 Nov 2015)
Sirung (Pantar Island, Indonesia ): degassing (updated 10 Jul 2015)
Slamet (Central Java): steam emissions (updated 12 Jan 2015)
Soputan (North Sulawesi, Indonesia): steaming, weakly active lava dome (updated 31 Mar 2016)
Telica (Nicaragua): lava glow from crater, degassing, occasional light ash emissions (updated 8 Apr 2016)
Turrialba (Costa Rica): sporadic ash emissions, weak crater glow (updated 4 Apr 2016)
Ulawun (New Britain, Papua New Guinea): degassing, ash venting (updated 5 Aug 2013)

Previous news
Seismic recording at Ruapehu volcano today (Far West station / Geonet)
Saturday, Apr 30, 2016
Ruapehu (North Island): (30 Apr) An earthquake swarm has been occurring at the volcano since 26 April. ... [more]

Wednesday, Apr 27, 2016
Kliuchevskoi (Kamchatka): As had been previously suggested, the volcano's most recent eruptive phase had become both effusive and explosive: in addition to ash-generating strombolian explosions from the summit vent, a new, but short-lived lava flow appeared during 23 or 24 April and descended approx. 800 m on the south-eastern flank of the volcano (along the Apakhonchich ravine). ... [more]
Klyuchevskoi volcano this morning with what is likely a new lava flow (KVERT webcam)
Sunday, Apr 24, 2016
Kliuchevskoi (Kamchatka): The activity of the volcano has intensified, in particular during the past 24-36 hours. KVERT reported that strong strombolian explosions produced an ash plume that rose to 8-9 km altitude that drifted more than 400 km to the SW. ... [more]
Saturday, Apr 23, 2016
Pavlof (Alaska Peninsula, USA): (23 Apr) Seismic activity at the volcano has continued to decrease over the past two weeks and no anomalous activity has been detected in satellite data since weakly elevated surface temperatures were seen on April 8. ... [more]
Ash plume from Santiaguito yesterday morning (image: Carlos Ventura / Prensa Libre)
Friday, Apr 22, 2016
Langila (New Britain, Papua New Guinea): Darwin VAAC reported ash emissions from the volcano that rose to 7,000 ft (2.1 km) altitude and drifted up to 100 km north. Aviation color code is at orange. ... [more]

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