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Report on Chikurachki (Russia) — 27 February-5 March 2002

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 27 February-5 March 2002
Managing Editor: Gari Mayberry

Please cite this report as:

Global Volcanism Program, 2002. Report on Chikurachki (Russia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 27 February-5 March 2002. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (27 February-5 March 2002)


Chikurachki

Russia

50.324°N, 155.461°E; summit elev. 1781 m

All times are local (unless otherwise noted)


Reports from the town of Severo-Kurilsk revealed that renewed activity occurred at Chikurachki during 23-27 February. On 25, 26, and 27 February ash plumes occasionally rose above the crater and ash fell in the vicinity of Tukharka River. In addition, snow melted very quickly near the volcano. On [28] February an ash plume rose a short distance above the volcano and drifted to the NNE. During the report period several clouds were visible on AVHRR satellite imagery that may have been composed of gas and steam released from the volcano.

Geologic Background. Chikurachki, the highest volcano on Paramushir Island in the northern Kuriles, is actually a relatively small cone constructed on a high Pleistocene volcanic edifice. Oxidized basaltic-to-andesitic scoria deposits covering the upper part of the young cone give it a distinctive red color. Frequent basaltic plinian eruptions have occurred during the Holocene. Lava flows from 1781-m-high Chikurachki reached the sea and form capes on the NW coast; several young lava flows also emerge from beneath the scoria blanket on the eastern flank. The Tatarinov group of six volcanic centers is located immediately to the south of Chikurachki, and the Lomonosov cinder cone group, the source of an early Holocene lava flow that reached the saddle between it and Fuss Peak to the west, lies at the southern end of the N-S-trending Chikurachki-Tatarinov complex. In contrast to the frequently active Chikurachki, the Tatarinov volcanoes are extensively modified by erosion and have a more complex structure. Tephrochronology gives evidence of only one eruption in historical time from Tatarinov, although its southern cone contains a sulfur-encrusted crater with fumaroles that were active along the margin of a crater lake until 1959.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)