Volcano Discovery Friday Apr 19, 2013 19:03 PM
Webcam image of the crater area of Stromboli (INGV)
Map of recent quakes near Miyake-Shimy volcano
Stromboli (Eolian Islands, Italy): (18 Apr) The lava flow continues to be alimented, but effusion rate has apparently dropped and only the upper portion of the flow seems currently active. The seismic signal shows strong eruption tremor and continuous rockfall signals.
Etna (Sicily, Italy): (18 Apr) The 11th paroxysm from the New SE crater occurred as expected today. As during the previous eruption, the build-up phase with increasing strombolian activity was relatively long. The peak phase itself when activity culminated in lava fountains was comparably short.
Miyake-shima (Izu Islands): (19 Apr) A strong earthquake swarm, presumably caused by a magmatic intrusion, has started Wednesday at Miyake volcano in the Japanese Izu Islands.
On Wednesday alone, JMA recorded 136 earthquakes with magnitudes up to an earthquake of magnitude 5.6, which was widely felt in the region.
Nevado del Ruiz (Colombia): (18 Apr) A magnitude 4 earthquake occurred last night under the volcano, marking the so far largest event during the ongoing earthquake swarm, which in turn is likely a result of a shallow magma intrusion at depths of 5-9 km SW of Arenas crater. The earthquake was felt by many inhabitants of the area.
Volcano Activity Summary for 19 Apr 2013:
Currently erupting:
Ambrym (Vanuatu): active lava lakes in several craters (updated 22 Mar 2013)
Bagana (Bougainville Island, Papua New Guinea): occasional ash explosions (updated 16 Apr 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 16 Apr 2013)
Colima (Western Mexico): frequent explosions from growing lava dome, glowing rockfalls and small pyroclastic flows (updated 14 Apr 2013)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 16 Apr 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 18 Apr 2013)
Fuego (Guatemala): weak to moderate strombolian activity (updated 14 Apr 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 26 Mar 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 4 Apr 2013)
Kizimen (Kamchatka): growing lava dome, lava flow on eastern flank, avalanches (updated 4 Apr 2013)
Lokon-Empung (North Sulawesi, Indonesia): frequent small to moderate ash explosions (updated 14 Apr 2013)
Manam (Papua New Guinea): steaming, occasional ash venting (updated 16 Apr 2013)
Nyiragongo (DRCongo): active lava lake in summit crater (updated 8 Apr 2013)
Ol Doinyo Lengai (Tanzania): spattering and lava flows of natrocarbonatite lava inside the summit crater (updated 9 Dec 2012)
Pacaya (Guatemala): weak strombolian activity from Mackenney crater (updated 14 Apr 2013)
Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 16 Apr 2013)
Rabaul (Tavurvur) (New Britain, Papua New Guinea): ash emissions, small explosions (updated 14 Mar 2013)
Reventador (Ecuador): growing lava dome, lava flows on upper flank, frequent explosions (updated 14 Apr 2013)
Sakurajima (Kyushu, Japan): 0-3 weak to moderate vulcanian-style explosions per day, ash clouds up to 2-3 km altitude (updated 14 Apr 2013)
Santa María / Santiaguito (Guatemala): advancing viscous active lava flows, weak occasional explosions (updated 14 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 14 Apr 2013)
Stromboli (Eolian Islands, Italy): Lava flow on Sciara del Fuoco in January 2013 (updated 18 Apr 2013)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Tolbachik (Kamchatka): effusion of fluid lava flows (updated 11 Apr 2013)
Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 8 Apr 2013)
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