Anak Krakatau volcano (Indonesia): growing lava dome
An active lava dome is growing inside the summit crater of Krakatau volcano. Our tour expedition leader Andi just returned from a visit and reports that the dome is now about 100 m wide, and has 2 main active vents that eject jets of incandescent gas.
At night, the glow from the dome is clearly visible from Rakata and Sertung islands, and a continuous intense solfatara plume is rising about 500 m above the summit.
Andi and our group observed also that there are now more and larger fumarole fields on the southern part of the cone.
According to our observations and the opinion of local scientists, this area is inflated due to the pushing of the lava dome. The seismic recordings from the observatory of Krakatau also show an increase in activity. On 26 March, there were 138 volcanic-tectonic (A-type) earthquakes and 300 long-period (B-type) quakes alone. The question is how long the lava dome remains quiet and purely effusive in style. Explosive, also larger vulcanian-type ones, activity could occur any time.
Alert level raised for remote Alaska volcano
ANCHORAGE, Alaska (AP) — The alert level for a remote Alaska volcano has been raised again after scientists found another lava dome has formed in the crater in the last week.
The Alaska Volcano Observatory on Wednesday increased the level for Cleveland Volcano, a 5,675-foot peak on uninhabited Chuginadak Island about 940 miles southwest of Anchorage. The status was raised earlier this year when the center detected two small, likely ash-poor eruptions through March 13, but lowered the alert level last week after 10 days of inactivity.
Scientists can't actively monitor the volcano because there is no real-time seismic monitoring network on the volcano in the Aleutian Islands. Authorities say sudden eruptions could occur at any time, and ash clouds 20,000 feet above sea level are possible.
Montserrat volcano active again
St. John’s Antigua- For the first time in two years, the Montserrat Volcano Observatory (MVO) monitoring the Soufriere Hills volcano noted unusual activity, with increased seismicity, accompanied by ash fall.
Acting Director of MVO Roderick Stuart said the change, which was noted on Friday, is a break from a long state of pause, thus a reminder the volcano is still very active and residents there must always be cautious and aware.
Stuart reported, “Last Friday we had the first sort of activity in the volcano in over two years. It generated some ash and because it was the first activity we had in two years, it was almost a precautionary measure that we closed daytime access to Zone C just in case this activity started something bigger,” Stuart told
Originally posted by BobAthome
2012-04-12 00:55:12 2.6 15 Km
2012-04-03 03:59:19 2.7 8 Km
in my best ARTY JOHNSON ,ya im that old,,
9 days,,all was quiet,,sireign,,even,,
the waky,,waky,, from down below,,
This is the one that scares me personally,,
has an interesting history,,
so my question ,,what happened ,at area X
traveling at the speed of lets say,,
sonic wavelength,,at a high enough frequency,
a hardening volvanic rock-plug
of a newly formed,,gateway?
and arrive at close too,,
Any profs out there??
And TZavros,, at the ETNA site would love too here your opinion,, that gut is a hell of a Vulcanoligist,,
bang and for ETNA again,, and sorry if i get your name wrong,, Ps,, hows Silo? with her national geographic award winning pictures of the eruption of ETNA??
outstand, and hats off too both of them,, but i wander away, from the main topic,, my apoligies,,
opps sorry that;s the stats for,,,,Santorini,,its in Italy,,home of Etna,,
Whom i also personaly believe is a Male Volcano,,,,lol sorry Silo,,,
edit on 12-4-2012 by BobAthome because: (no reason given)edit on 12-4-2012 by BobAthome because: (no reason given)
Originally posted by Moshpet
For all you volcano watchers out there
Caught this a bit ago.
April 22, 2012
At 08: 02 (local time) today, 22 April, seismic sensors of the Tungurahua volcano reported an explosion followed by a signal of tremor of emission of high energy, which is maintained until the closure of this bulletin.
The explosion produced a Cannonball of moderate intensity and noise associated roll of blocks by the flanks of the volcano. Due to the presence of cloud not been observations. From 08: 23 (local time) received reports of gravel (slag) of the size of rice grains fall in the population of Pillates, located to the West of the volcano. From that same time, reports also the almost constant generation of bellows of moderate intensity.