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Volcanic activity worldwide 29 Sep 2013: Sakurajima, Jebel Zubair, Etna

Sunday Sep 29, 2013 18:03 PM |

Current tremor signal (ESLN station, INGV Catania)
Current tremor signal (ESLN station, INGV Catania)
Powerful strombolian explosion from Sakurajima at 13:48 UTC on 27 Sep (22:48 local time)
Powerful strombolian explosion from Sakurajima at 13:48 UTC on 27 Sep (22:48 local time)
Steam plume and discolored water around the new submarine eruption site (NASA / Terra satellite image 28 Sep, annotated by Blog Culture Volcan)
Steam plume and discolored water around the new submarine eruption site (NASA / Terra satellite image 28 Sep, annotated by Blog Culture Volcan)
Etna (Sicily, Italy): Activity at the New SE crater has eased for now. Some occasional small strombolian explosions were last noted about 2 days ago. Tremor amplitude has decreased slightly as well.

Sakurajima (Kyushu, Japan): Activity fluctuates on a scale of few days, but remains at relatively high levels overall. Explosions from the Showa crater often follow each other at intervals of few hours, and ash plumes regularly surpass 10,000 ft altitude (something that had been more rare during the past years).
Most explosions are of vulcanian type (strong fragmentation of solid material blocking the vent, generation of tall ash plumes, often with shock waves and explosion sounds) and more rarely strombolian, with mainly incandescent lava ejected in fountains of several hundred meters and only little ash.
Following most explosions, the volcano usually continues to near-constantly emit ash plumes of various size for several hours. These plumes, when observed during the past days, were up to about 500 m tall, with sometimes weak strombolian activity visible reaching above the crater rim.

Jebel Zubair (Red Sea): A submarine eruption started yesterday (28 Sep) NW of the island Jebel Zubair and SW of the site of the 2011-12 eruption. The activity manifestated itself in form of a strong SO2 anomaly and steam plume spotted on satellite imagery.
No signs of activity are visible on images taken on 27 Sep, which confirms that the eruption started yesterday.
The presence of the significant steam plume suggests that the eruption vent is a shallow depth (less than 100 m), and possibly in the stage of producing so-called surtseyan activity (violent steam-driven explosions breach the surface with jets of water and steam, and become more and more rich in lava fragments as the vent becomes shallower). often

Volcano Activity Summary for 29 Sep 2013:

Currently erupting:

Ambrym (Vanuatu): active lava lakes in several craters (updated 16 Sep 2013)
Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 19 Sep 2013)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 24 Sep 2013)
Chirinkotan (Northern Kuriles): unspecified activity - possibly lava flows (updated 2 Sep 2013)
Cleveland (Aleutian Islands, Alaska): continuous small eruptions (updated 6 May 2013)
Colima (Western Mexico): lava flow on upper eastern flank (updated 19 Jul 2013)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 24 Sep 2013)
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): lava flow on upper southern flank, small to moderate explosions (updated 24 Sep 2013)
Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012)
Grozny (Iturup Island): fumarolic activity (updated 3 Apr 2013)
Jebel Zubair (Red Sea): submarine eruption started 28 Sep 2013 (updated 29 Sep 2013)
Karkar (Northeast of New Guinea): possible ash eruption on 1 February (updated 15 Mar 2013)
Kilauea (Hawai'i): lava lakes in Halemau'uma'u and Pu'u 'O'o, lava flows on coastal flat and weakly active ocean entries (updated 13 Aug 2013)
Kizimen (Kamchatka): growing lava dome and incandescent rock avalanches (updated 6 Sep 2013)
Klyuchevskoy (Kamchatka): strombolian activity at summit crater (updated 24 Sep 2013)
Marapi (Western Sumatra, Indonesia): occasional weak explosions (updated 14 Aug 2013)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 12 Jun 2013)
Ol Doinyo Lengai (Tanzania): effusion of natrocarbonatite lava inside the crater (updated 8 Jul 2013)
Pacaya (Guatemala): strombolian activity and lava flow (updated 24 Sep 2013)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 12 Aug 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): explosions and ash emissions (updated 12 Sep 2013)
Reventador (Ecuador): ash explosions, occasional pyroclastic flows (updated 24 Sep 2013)
Sakurajima (Kyushu, Japan): constant ash emissions and strong explosions (updated 29 Sep 2013)
Santa María / Santiaguito (Guatemala): Santiaguito volcano (Guatemala): lava flow on south flank of dome becomes more active (updated 24 Sep 2013)
Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 25 Jul 2012)
Shiveluch (Kamchatka): slow dome growth, occasional explosions and pyroclastic flows (updated 12 Sep 2013)
Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 25 Jul 2013)
Suwanose-jima (Ryukyu Islands): Mt Ontake volcano of Suwanose-jima Island, Japan (updated 12 Sep 2013)
Telica (Nicaragua): normal (low) seismic activity (updated 26 Sep 2013)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 10 Sep 2013)

Eruption warning / minor activity:

Bezymianny (Central Kamchatka Depression): slow lava flow extrusion from dome (updated 6 Sep 2013)
Copahue (Chile/Argentina): degassing, weak sporadic ash emissions (updated 16 Aug 2013)
Dieng (Central Java): increased degassing (updated 28 Mar 2013)
Etna (Sicily, Italy): sporadic ash emissions from New SE crater (updated 17 Sep 2013)
Galeras (Colombia): sporadic ash emissions (updated 25 Jul 2013)
Gamkonora (Halmahera): seismic swam, minor ash emissions (updated 27 May 2013)
Heard (Australia, Southern Indian Ocean): likely lava lake in summit crater (updated 10 Sep 2013)
Ibu (Halmahera, Indonesia): growing lava dome, seismic unrest (updated 9 Jun 2013)
Iliwerung (Lesser Sunda Islands): possible submarine eruption from Mt Hobal on 20 August (updated 20 Aug 2013)
Iwo-Tori-shima (Ryukyu Islands): possible small ash eruption on 6 July 2013 (updated 6 Jul 2013)
Karangetang (Siau Island, Sangihe Islands, Indonesia): lava extrusion at summit crater, strombolian activity, glowing avalanches (updated 4 Sep 2013)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 6 Sep 2013)
Kerinci (Sumatra): occasional ash explosions (updated 5 Jun 2013)
Ketoi (Kurile Islands, Russia)
Kikai (Ryukyu Islands): steaming at summit crater of Iodake, occasional weak glows (updated 5 Jun 2013)
Kirishima (Kyushu): degassing, slightly increased seismic activity (updated 30 Jul 2012)
Krakatau (Sunda Strait, Indonesia): occasional explosions (updated 27 Jun 2013)
Langila (New Britain, Papua New Guinea): occasional ash explosions (updated 11 Feb 2013)
Lokon-Empung (North Sulawesi, Indonesia): small explosions, lava flow? (updated 24 Sep 2013)
Manam (Papua New Guinea): occasional explosions (updated 12 Sep 2013)
Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013)
Merapi (Central Java): moderate gas and ash plume on 22 july (updated 24 Jul 2013)
Nevado del Ruiz (Colombia): seismic unrest (updated 14 Sep 2013)
Nyamuragira (DRCongo): steaming/degassing from pit inside summit caldera (updated 18 Jul 2013)
Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013)
Poas (Costa Rica): occasional small phreatic explosions from lake (updated 22 Aug 2013)
Popocatépetl (Central Mexico): steam/gas/ash emissions (updated 24 Sep 2013)
Rasshua (Central Kuriles)
Raung (East Java): strombolian activity in summit crater (updated 5 Aug 2013)
Rincón de la Vieja (Costa Rica): small phreatic eruption on 11 April (updated 6 Oct 2012)
Sacabaya (Northern Chile, Bolivia and Argentina)
Sangay (Ecuador): no recent explosions reported (updated 24 May 2013)
Tolbachik (Kamchatka): effusion of fluid lava flows (updated 6 Sep 2013)
Tungurahua (Ecuador): degassing, earthquake swarm and inflation (updated 14 Sep 2013)
Turrialba (Costa Rica): ash venting, strong degassing (updated 24 Jul 2013)
Ubinas (Peru): occasional phreatic explosions (updated 20 Sep 2013)
Ulawun (New Britain, Papua New Guinea): steaming, degassing (updated 12 Sep 2013)
White Island (New Zealand): strong degassing, volcanic tremor (updated 20 Aug 2013)

Previous news
Explosion yesterday evening (25 Sep) from Etna's New SE crater (photo: Marco Restivo / www.etnawalk.it)
Thursday, Sep 26, 2013
Etna (Sicily, Italy): Strombolian activity continues at the New SE crater. Whether (and when) this might lead to another paroxysm is unclear. The volcanic tremor signal is still relatively low. ... [more]
Ash emission from Etna's New SE crater this morning
Tuesday, Sep 24, 2013
Etna (Sicily, Italy): Weak strombolian activity and ash emissions continue from the New SE crater. Tremor amplitude continues to rise very slowly. ... [more]
Small ash eruption from the New SE crater this morning (Etna-Trekking webcam)
Sunday, Sep 22, 2013
Etna (Sicily, Italy): Sporadic small ash emissions have reappeared from the New SE crater during the past days, although weather conditions did not often allow direct observation. Since about 4 days ago, tremor has been showing a slowly rising trend, although it is still at low levels. ... [more]
Earthquakes near Tarumai in 2013
Friday, Sep 20, 2013
Shikotsu (Hokkaido): The latest report of the Japan Meteorological Agency indicates some unrest at the caldera. Seismic activity accompanied by inflation were recorded under the western flank of Tarumai stratovolcano (the most active vent of the system, located on the SW rim of the Shikotsu caldera) between late June and early July this year. ... [more]
Klyuchevskoy volcano last evening with glow from the active lava flow
Thursday, Sep 19, 2013
Klyuchevskoy (Kamchatka): (19 Sep) Lava flows remain active on the SW upper flank and are often visible on the beautiful KVERT webcam. ... [more]

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