Cerro Negro de Mayasquer (Colombia): The alert level of the twin-volcanoes Cerro Negro and Chiles has been raised to yellow in response to an ongoing seismic crisis and deformation that has been detected since November 2013, when a new monitoring network had been installed.
INGEOMINAS reported that seismic activity has remained elevated and that so far, more than 60,000 small earthquakes at shallow depths (1-6 km) have been recorded since November 2013. The epicenters were between 3-5 km SW of the Chiles volcano, while deformation affects neighboring Cerro Negro volcano to the west. Several of them were felt by people living close by. The largest quake so far was a magnitude 4.5 event that was felt widely.
… [read more] Colombian volcanologists mapped the risk zones for each of the two volcanoes. Neither of them has recorded historical eruptions and little is known about their activity. Whether or not the current unrest leads to an eruption in a near or medium-term future (months, years), and if so, which of the two volcanoes would be involved is unknown.
Etna (Sicily, Italy): (2 May) A seismo-volcanic event occurred this night at 23:00 (local time) most probably from the Bocca Nuova crater. It wasn’t visible on webcams but only on the seismic tremor and infrasound signals.
Askja (Central Iceland): A swarm of shallow earthquakes at 2-10 km depth has started under the Herðubreið volcano about 12 km NE of the Askja caldera. The largest earthquakes so far were 2 magnitude 3.2 and 3.0 events.
Whether the earthquakes are caused by intruding magma at shallow depth, and could be a potential precursor to a new eruption of the volcano, is at present unknown.
Dukono (Halmahera): Explosive eruptions, strombolian to vulcanian type, continue at the volcano. Ash plumes at 8,000 ft (2.4 km) altitude were observed drifting up to 50 nautical miles to the east.
Fuego (Guatemala): With the arrival of the rain season, INSIVUMEH warns of mud flows that will likely occur during heavy rainfalls remobilizing loose deposits that have accumulated in the canyons draining from the volcano. Such lahars are potentially very destructive and can reach and flood low lying areas on the south coast.
The canyons that are most affected by lahars include the Santa Teresa, Taniluya, Ceniza, El Jute, Trinidad, and Las Lajas canyons, which are tributaries of the rivers Pantaleon, Achiguate, and Guacalate.
Similarly, at Santiaguito volcano, lahars could occur inside the river beds of Nima I, Nima II, San Isidro-Tambor, which drain into the Samala river. Potential damage could be afflicted to the bridge of Castillo Armas, and to the road turn at Niño.
Currently erupting:
Ambrym (Vanuatu): active lava lakes in several craters (updated 14 Aug 2013)
Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 1 May 2014)
Barren Island (Indian Ocean): intermittent activity, likely strombolian-type and/or lava flows (updated 4 Feb 2014)
Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 28 Apr 2014)
Colima (Western Mexico): extrusion of lava flow from summit, intermittent explosions (updated 10 Apr 2014)
Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 1 May 2014)
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): frequent moderate to large strombolian explosions (updated 30 Apr 2014)
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): likely lava lake in summit crater (updated 1 Aug 2013)
Ibu (Halmahera, Indonesia): growing lava dome, occasional ash emissions (updated 30 Mar 2014)
Karkar (Northeast of New Guinea): possible ash eruption on 1 February (updated 27 Mar 2014)
Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 13 Apr 2014)
Kavachi (Solomon Islands): no eruption since 2007 (updated 2 Feb 2014)
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): degassing (updated 22 Aug 2013)
Lokon-Empung (North Sulawesi, Indonesia): small explosions, lava flow? (updated 25 Jul 2013)
Manam (Papua New Guinea): degassing, occasional ash venting (updated 28 Aug 2013)
Marapi (Western Sumatra, Indonesia): sporadic explosions (updated 27 Mar 2014)
Nishino-shima (Volcano Islands): lava effusion enlarging the new island (updated 18 Apr 2014)
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)
Reventador (Ecuador): intermittent explosions, lava fountaining and lava flow emission on 23-24 April (updated 28 Apr 2014)
Sakurajima (Kyushu, Japan): ash venting, intermittent explosions (updated 28 Apr 2014)
Santa María / Santiaguito (Guatemala): Santiaguito volcano (Guatemala): lava flow on south flank of dome becomes more active (updated 28 Apr 2014)
Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 25 Jul 2012)
Shiveluch (Kamchatka): growing lava dome, incandescent avalanches, occasional explosions (updated 1 May 2014)
Sinabung (Sumatra, Indonesia): effusion of viscous lava, steaming, ash emissions (updated 28 Apr 2014)
Slamet (Central Java): strombolian explosions from central crater (updated 30 Apr 2014)
Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 25 Jul 2013)
Suwanose-jima (Ryukyu Islands): strombolian activity in summit crater (updated 1 May 2014)
Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013)
Tungurahua (Ecuador): strombolian activity, effusion of lava flow on upper NW flank (updated 28 Apr 2014)
Ubinas (Peru): weak ash emissions (updated 1 May 2014)
Yasur (Tanna Island, Vanuatu): ash emissions, weak strombolian explosions (updated 14 Aug 2013)
More at Volcano Discovery: Volcanic activity worldwide 5 May 2014: Cerro Negro de Mayasquer, Etna, Fuego, Askja, Dukono
Filed under: News/ Current Events, Volcanic Activity 
