Volcano Discovery Friday May 03, 2013 16:51 PM
Seismic signal from Ruiz this morning (OLL station, INGEOMINAS)
Current seismic signal from RETU station (IG)
Sakurajima (Kyushu, Japan): Since 1 May, activity has been increasing again from relatively low levels during the weeks before. Over the past 3 days, several explosions have produced ash plumes rising to 10,000 ft (3 km) altitude and on most days, there have been 3-4 daily explosions (for Sakurajima, this is a large number).
Popocatépetl (Central Mexico): Some small earthquake swarms have occurred at the volcano in the past days, probably associated with some batches of fresh magma intruding into the system at shallow depth.
This resulted in increased degassing, visible as a significant SO2 plume on NOAA satellite data. Surface activity, however, has remained low with very few emissions and only faint glow at the summit.
Fuego (Guatemala): Activity has further decreased with very few explosions reported since yesterday, and no activity at the lava flows.
Also, Santiaguito has been rather calm today, and no direct observations could be made at Pacaya.
Nevado del Ruiz (Colombia): Seismic activity is still elevated, but has been decreasing today, possibly meaning that the most recent magma intrusion is coming to an end (with no eruption).
Tungurahua (Ecuador): Eruptive activity has not changed much. The volcano observatory reported ongoing steam and ash emissions producing a plume oscillating between 1.5-3 km height above the crater and drifting into westerly directions, and occasional small to moderate explosions. Light ash fall occurred in Cevallos and Mocha. Incandescence was visible at the summit.
Volcano Activity Summary for 3 May 2013:
Currently erupting:
Ambrym (Vanuatu): active lava lakes in several craters (updated 2 May 2013)
Bagana (Bougainville Island, Papua New Guinea): occasional ash explosions (updated 2 May 2013)
Bas Dong Nai (Vietnam)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 29 Apr 2013)
Colima (Western Mexico): frequent explosions from growing lava dome, glowing rockfalls and small pyroclastic flows (updated 25 Apr 2013)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 2 May 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)
Etna (Sicily, Italy): ash emissions and strombolian activity at New SE crater (updated 27 Apr 2013)
Fuego (Guatemala): weak to moderate strombolian activity (updated 3 May 2013)
Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012)
Grozny (Iturup Island): fumarolic activity (updated 3 Apr 2013)
Heard (Australia, Southern Indian Ocean): possible lava lake in summit crater (updated 2 May 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 20 Apr 2013)
Kizimen (Kamchatka): growing lava dome, lava flow on eastern flank, avalanches (updated 25 Apr 2013)
Lokon-Empung (North Sulawesi, Indonesia): frequent small to moderate ash explosions (updated 14 Apr 2013)
Manam (Papua New Guinea): strombolian explosions, lava flow on southern flank (updated 16 Apr 2013)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 20 Apr 2013)
Ol Doinyo Lengai (Tanzania): spattering and lava flows of natrocarbonatite lava inside the summit crater (updated 9 Dec 2012)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 29 Apr 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): ash emissions, small explosions (updated 14 Mar 2013)
Sakurajima (Kyushu, Japan): 0-3 weak to moderate vulcanian-style explosions per day, ash clouds up to 2-3 km altitude (updated 3 May 2013)
Sangay (Ecuador): no recent explosions reported (updated 27 Apr 2013)
Santa María / Santiaguito (Guatemala): advancing viscous active lava flows, weak occasional explosions (updated 30 Apr 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 22 Apr 2013)
Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 2 May 2013)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Tolbachik (Kamchatka): effusion of fluid lava flows (updated 1 May 2013)
Tungurahua (Ecuador): ash emissions, explosions (updated 3 May 2013)
Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 8 Apr 2013)
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