February 28 , 2017. EN. Etna , Fuego , Anak Krakatau , Turrialba , Piton de la Fournaise .
February 28 , 2017.
Crash PC yesterday……. GRRRRRRRRRRRRRR
Etna , Sicily :
Boris Behncke ( INGV ) communicates on social networks:
Eruptive activity (intense Strombolian activity and lava flow emission) at Etna’s Southeast Crater on the late evening of 27 February 2017, seen from Nicolosi (south flank, 15 km from the summit) and Piano Vetore (southwest flank, about 6 km from the summit)
INGV has not yet commented.
Source : B Behncke ,
Photo : B Behncke
Fuego , Guatemala :
Activity type: Vulcanian
Morphology: Stratovolcan composite
Geographical location: 14 ° 28’54 latitude N; 90 ° 52’54 longitude W.
Altitude: 3,763 m s n m.
The second eruption of the Fuego volcano was completed, about 12 hours after starting with the RSAM grid.
The volcano continues with moderate explosions generating columns of ash that have reached a height of approximately 4,500 m (14,763 pies) and have moved to the northeast, northern, and eastern flanks. Occasionally these explosions have generated moderate rumblings sensitive to a few kilometers of the volcano.
During the hours of the night were observed three lava flows, the first towards Santa Teresa, reaching an approximate length of 1,200 meters, the second towards Ceniza with a length of 1,600 meters and the third towards Las Lajas with a distance of approximately 1 300 meters. These were fed by lava fountains that rise 300 meters above the ridge and generate avalanches on the outline of the crater. It is hoped that these flows will disappear in the coming hours.
The eruptive behavior has decreased but not the possibility of generating pyroclastic flows.
Source : Insivumeh
Anak Krakatau , Indonésia :
Notre ami Oystein Lund Andersen a fait une visite sur l’Anak Krakatau le 25 Fevrier . Voici ses observation très précises comme toujours.
Anak Krakatau erupted in February, and sources state that the date of the eruption to be 17-18th February. Thermal hot-spot data from Modis support this, as hot-spots was recorded on both days (see illustration 1.)
On arrival at Krakatau in the morning of the 25th February traces of the February eruption was seen observed. The eruption have resulted in a new lava-flow on the SE flank, exacly at the same place, as the September 2012 lava-flow (see photo no.1). The new layer of lava-flow is black, compared to the red color of the 2012 lava flow. The lava flow has cooled down since the material was deposited. Fresh volcanic blocks were also seen distributed on the SE, S, E flank of Krakatau.
After having studied aerial views of the crater area, it seems that the source vent of the new lava-flow, is the same vent (main, central vent) that was involved in the 2012 eruption. On the top of the vent, it now seems to be a lava-dome (see photo no.2). I also made a illustration to show the difference between the crater area of Anak Krakatau of October 2015 vs today. From the illustration it is easy to identify the lava-dome.
Daytime observation showed focused gas emissions around the vent/dome. The lava dome was visible from Verlaten isl. 3km away from Anak Krakatau. Nighttime observation from Verlaten isl. and aerial observation from above the vent, showed incandescence from the lava dome. The area containing incandescence was however small, and the lava dome did not appear to be overly active. From the physical shape of the dome, it looks like the dome may have been present from before the eruption or that it emerged during the eruption, because the dome looks partly collapsed leading in the direction of the recent lava-flow.
During my visit no eruptions of ash were observed. Anak Krakatau emitted a medium strong plume of gas, that incresed somewhat in strength on the 26th February.
Source et photos : Oystein Lund Andersen, http://www.oysteinlundandersen.com/
Turrialba, Costa Rica :
Activity report of the Turrialba volcano:
27 February 2017, 11:00
During the last 24 hours, the Turrialba volcano has maintained a constant tremor in the network of seismic stations located in the upper part of the volcano.
The wind speeds are between 20 and 30 km / h depending on the IMN station, with a dominant to the northwest.
Most of the time, vapor, gas and ash emissions do not exceed 100 meters above the volcano, ash emissions are passive and sporadic.
There are no reports of ash falls.
An odor of sulfur is reported in Pacayas.
Source : Ovsicori
Piton de la Fournaise , La Réunion :
The eruption begun on January 31, 2017 at 7:40 pm local time stopped that day, February 27 at 7:30 pm local time, after a phase of just over nine hours of piston gas.
There are no assumptions about future developments, given the following observations:
– The inflation of the terminal cone in its summit and basal zone continues.
– CO2 concentrations in the soil at the heel remain high.
– The volcanic tremor (indicator of surface eruptive intensity) stopped around 10:10 on Monday, February 27th.
Source : OVPF
Photo : OVPF