KVERT issue Kamchatka volcanic activity report
12SAB006, 3 August 2011
Aviation Code Orange

Mt Sheveluch - 56°39'N, 161°21'E
Explosive-extrusive eruption of the volcano continues. Ash explosions up to FL330 could occur at any time. Ongoing activity could affect international and low-flying aircraft. Moderate seismic activity of the volcano continues. According to seismic data, ash plumes may have reached 15,400 ft (4.7 km) ASL on July 23 and 25-27. Moderate fumarole activity was observed on July 24 due to cloud obstruction further monitoring was not possible.

The Kamchatkan Volcanic Eruption Response Team (KVERT) has issued the following data concerning volcanic activity on the Kamchatka Peninsula in its weekly activity report.

Mt. Kizimen - 55°08'N, 160°19'E
Eruption of the volcano continues. Strong ash explosions up to FL330 could occur at any time. Ongoing activity could affect in¬ternational and low-flying aircraft. Seismic activity was above background levels all week. A weak volcanic tremor registered all week. According to the seismic data, it is possible that the ash plume may have reached up to FL100 for most of the week. Visual data from seismologists working in the vicinity of the volcano reveals that lava is flowing on the eastern flank of the volcano and a bright thermal anomaly has been recorded on satellite imagery all week. There is incomplete data of only one eruption of Kizimen (1928-29) that appears to have been moderately explosive in nature. However analysis of other data indicates that this volcano has produced several catastrophic eruptions during its evolution.

MtKarymsky - 54°03'N, 159°27'E
Explosive activity of the volcano continues. Ash explosions up to FL200 could occur at any time. Activity of the volcano could af¬fect low-flying aircraft. Moderate seismic activity of the volcano continues, possible weak ash plumes all week. A thermal anomaly was registering over the volcano on July 22 and 24-27; clouds obscured the volcano on the other days of week.

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