The eruption of a volcano named Tolbachi which is part of the Kliuchevskaya complex caused some stirring in the volcano community. Some discussion took place on VC. So i tried to do some summing up too.
“Tolbachik volcano and a lava field of the same name occupy the southwestern sector of the Kliuchevskoi volcanic group. Tolbachik volcano is built by two coalesced cones: Ostry (“Sharp”) Tolbachik and Plosky (“Flat”) Tolbachik . Both cones were built in the main by the end of the late Pleistocene and are composed of medium-K basaltic andesite”
One should not confuse Ostry Tobalchik, the highest peak of Plosky Tolbachik, with Ostry which is a different volcano also situated on the Kamtchatka peninsula.
Correction by Volcanic: the red circle is in fact the Ostry Tolbachik, the Plosky Tolbachik is a bit more more on the east (you see the caldera there).
To quote Wikipedia: ” Its eruptive history stretches back thousands of years, but the most notable eruption occurred in 1975, commonly known as “The Great Tolbachik Fissure Eruption”. It was preceded by an earthquake swarm, which led to a successful prediction of the eruption by scientists from the Russian Institute of Volcanology. The eruption created several new cindercones, and in terms of volume of lava emitted was Kamchatka’s largest basaltic eruption in historic times.”
Some here are more experienced with volcanoes than i am, so it is only fair to safe their comments in this post.
ukviggen says: November 27, 2012 at 22:37
Plosky Tolbachik now up to orange:
© KVERT: “According to the data by observers from Kozyrevsk and Lazo Villadges, a periodical incandescence of the volcano summit was noted by night. Probably a lava intrusions towards the summit caldera of Plosky Tolbachik volcano and Strombolian volcanic eruption occurs.”
Our very own GeoLurking on Tobalchik:
GeoLurking says: November 28, 2012 at 05:39
Summit – 3,682 m (3.68 km)
ERUPTION AT 20121127/0515Z FL200 REPORTED – > 2.41 km above summit – Rate 2.2 m³/s DRE
ERUPTION FL330 EXTD N-NW REPORTED AT 20121127/1045Z – > 6.38 km above summit – Rate 122.9 m³/s DRE
So.. its a first guess, assuming that the rate smoothly went from the 0515Z height to the 1045Z height. (not likely, but all I have are VAAC reports and a formula)
Rate was fitted to a straight linear interpolation at one second intervals, then integrated to find volume to that point in time.
It’s a guess. Possibly to VEI-3 already.
(end of comment)
Correction by Volcanic : Ostry Tolbachik (3682 m) and Plosky Tolbachik (3085 m)
Geolurking addendum: There have been no subsequent VAAC reports. This indicates that there is no current plume of note. My estimate of potentially VEI-3 should be taken with caution, the formula has an accuracy range of a factor of four… high or low. This range is according to the paper’s authors (Mastin et al).
Other sources reporting on the most recent eruption of Tobalchik:
First, as always, Erik Klemettis splendid blog Eruptions with the headline Russia’s Tolbachik Erupts for First Time in 36 Years
Kamchatka and the Northern Kuriles volcanoes: Erupting or Restless
Tolbachik Volcano – John Seach
Novinite.com Sofia: Tolbachik Volcano, Kamchatka, Erupts for 1st Time in 36 Years
GVP on Tobalchik
Here are all the recent ash advisories by Tokyo VAAC :
Most are on Sakurajima but there have been 2 on Tobalchik since yesterday. The latest can be found with this link : Volcanic Ash Advisory Text
A lot of close up images from a volcano treking tour 2010 can be found here.
Mt. Lokon strikes again as Renato Rio reported: Indonesia’s volcano erupts, warning issued
Mount Lokon, Lokon or in Indonesian Gunung Lokon is a twin volcano together with Mount ( Gunung) Empung, erupted once in 2011 after some years of inactivity. Ash and lava were spit up to a height of 1.5 km. 28000 people in a radius of 3.5 km around the volcano had to be evacuated. In 2012 Lokon grew restless and erupted in February, May, September and October.
Since 2011 Lokon is not erupting from it´s summit but from the mountain saddle which connects it to it´s twin mount Empung. Since 26.of November is seems to be erupting again from the very same place as the month before, but the only video i could find is in a 90 degree angle. From a giggle translation of a local newspaper i found that the latest eruption has destroyed the earthquake sensor equipment. So while people knew this time that something would be up again soon because of a higher earthquake activity, this warning may not be available for some time in the future.
I wont forget about the splendid comments and sources on mudvolcanoes and maybe work them into a post some fine day.
Lets not forget that IngeB reported that the glacier flood in Iceland is slowly subsiding.
Thank you ALL for the comments!!!!!
Update: had to make some corrections pointed out by our faitfull readers.
This is definitely not my day today.
georgiade found a cam for Lokon!!! http://www.qicknews.de/index.php/lokon-indonesien
Update 2: Renato found a webcam for Tolbachik! KVERT moved the Bezymianni cam! http://www.emsd.ru/video/Bezymianny/img_1.jpg
Mindat org has a page on the minerals spewn out in the last eruption.
http://www.mindat.org/loc-5602.html Microcollector pointed that one out. Please read the comments below. You will find interesting details about the chemical composition.