06/06/2015. Fuego, Bagana , Shishaldin.
Fuego, Guatemala :
Volcan Fuego (1402-1409)
Body type: composite stratovolcano
Geographical location: 14°28’54? Latitude N; 90°52’54? Longitude W
Today from 4:25, OVFGO, the seismic station FG3, reports and records the beginning of the effusive eruption of the Fuego volcano, which maintains an incandescent source that feeds two lava flows towards the south, towards the Canyon Trinidad, of 1200 meters long and the second to the north-west to the Canyon of Santa Teresa with 700 m long.
The eruption ejected gases and volcanic ash 5,000 meters above sea level, forming a column moving toward the west and south-west over a distance of 12 km. For now, this eruption is effusive, but however, can increase in energy in the next minutes or hours, may generate pyroclastic flows which descend through the canyons.
Therefore, the INSIVUMEH recommends: At CONRED: to maintain the yellow alert phase II of the state of Fuego and continue until the evolution of the eruption. At the Department of CIVIL AVIATION, to take precautions on the movement in the air of the ash column that will be increasing in the coming hours and travel a greater distance to the west, south and south -west .
Source : Conred
Photo : Insivumeh, Andrew Shepard.
Bagana , île de Bougainville, Papouasie-Nouvelle-Guinée :
Based on satellite observations, the volcano has produced a number of ash plumes rising to approx. 8,000 ft (2.4 km) altitude, which drifted 40 km to the west. (VAAC Darwin)
A strong heat source has been visible at the crater since 21 May as well. This suggests a new eruptive phase is in course, likely in form of a lava dome extrusion and/or mild strombolian activity.
Bagana volcano, occupying a remote portion of central Bougainville Island, is one of Melanesia’s youngest and most active volcanoes. This massive symmetrical, roughly 1850-m-high cone was largely constructed by an accumulation of viscous andesitic lava flows. The entire edifice could have been constructed in about 300 years at its present rate of lava production. Eruptive activity is frequent and characterized by non-explosive effusion of viscous lava that maintains a small lava dome in the summit crater, although explosive activity occasionally producing pyroclastic flows also occurs. Lava flows form dramatic, freshly preserved tongue-shaped lobes up to 50-m-thick with prominent levees that descend the volcano’s flanks on all sides. Satellite thermal measurements indicate a continuous eruption from before February 2000 through at least late August 2014.
Source : Volcanodiscovery, GVP .
Photo : George Steinmetz
Shishaldin, Alaska :
54 ° 45’19 “N 163 ° 58’16” W,
Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Low-level eruptive activity continues at Shishaldin Volcano. Elevated surface temperatures were evident in satellite data a few times throughout the week, and occasional clear web camera views of the volcano showed a persistent steam plume emanating from the summit.
The Shishaldin (background) is a superb example of young symmetric stratovolcano, the Isanotski (1st level), much older is irregular and deeply eroded.
Continuous seismic tremor is being detected by the local seismic network and this type of seismicity is generally indicative of low-level eruptive activity. The lack of fresh deposits on the upper part of the volcano or ash emissions detected in satellite or web camera views indicates that any eruptive products being generated are confined to the summit crater.
Source : AVO
Photo : Swisseduc