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SI/USGS Weekly Volcano Report for 1/13-19/2010

By eklemetti on January 20, 2010.

This week's USGS/Smithsonian GVP Volcano Update!

Highlights include:

  • A volcano I had never heard of in the Kuril islands is showing signs of life: Kharimkotan. Satellite images show a thermal anomaly at the summit of the volcano - its last known eruption was in 1933.
  • Ash, sulfur dioxide and steam continue to erupt from Nyamuragira in the Congo, although lava flows have abated.
  • Crater C at Arenal had sporadic strombolian activity - which is par for the course for the Costa Rican volcano.
  • I must have missed this, but since December 14, the ash erupted at Gaua in Vanuatu has become denser and darker - and is still being emitted.
  • Increased fumarolic activity was spotted at Planchon-Peteroa in Chile, but this apparently common in the height of summer (in the southern hemisphere).
Tags
Arenal
ash plumes
Chile
Congo
Costa Rica
Gaua
Global Volcanism Program
Kharimkotan
Nyamulagira
Nyamuragira
Planchon-Peteroa
remote sensing
russia
Smithsonian Institution
strombolian eruption
USGS
Vanuatu
volcanic gases
volcanic hazards
volcano monitoring
GVP
Smithsonian
remote sensing
volcanic gases
volcanic hazards
volcano monitoring

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Kharimkotan (or Harimkotan) is a small but interesting volcano, because during its 1933 eruption there was a large sector collapse producing a debris avalanche that rushed into the sea and generated a tsunami. Luckily this happened in a rather sparsely populated area. There is a short article by Belousova and Belousov(in pdf) available on the Internet:
http://www.kscnet.ru/ivs/bibl/vulk/xarimk/harimkotan.pdf
and a more recent (2007) abstract by Belousov and Belousova is here:
http://adsabs.harvard.edu/abs/2007AGUFM.V31E0711B
The 1933 collapse was followed by a Plinian eruption and finally a lava dome grew within the collapse amphitheater. There has been no eruption at this volcano since then.

The description (and photo) of Karimkotan reads like a history and/or prediction for Mt. St. Helens

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