Powerful eruption at Sheveluch volcano, ash to 12.2 km (40 000 feet) a.s.l.

sheveluch-eruption-russia-august-2017

A powerful eruption took place at Russia's Sheveluch volcano at 16:31 UTC on August 8, 2017. Ash cloud drifted SSE of the volcano. According to the Tokyo VAAC, ash cloud reached an altitude of 12.2 km (40 000 feet) above sea level.

At 21:20 UTC, the front of the 220 km (137 miles) long ash cloud was located about 360 km (224 miles) SSE of the volcano.

At 03:17 UTC on August 9, KVERT reported that explosive eruption of the volcano was ending, adding that a large ash cloud continues to drift from the volcano. The front was stretching out to the west and east. At 02:30 UTC, its western edge was about 490 km (305 miles) from the volcano, while the eastern edge was about 600 km (373 miles).

Aviation Color Code remained Orange.

The explosive-extrusive eruption of the volcano continues, the agency said and warned that ash explosions up to 10 – 15 km (32 800 – 49 200 feet) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.

Geological summary

The high, isolated massif of Sheveluch volcano (also spelled Shiveluch) rises above the lowlands NNE of the Kliuchevskaya volcano group. The 1 300 km3 (311.9 mi3) volcano is one of Kamchatka's largest and most active volcanic structures.

The summit of roughly 65 000-year-old Stary Shiveluch is truncated by a broad 9-km-wide late-Pleistocene (5.6 miles) caldera breached to the south. Many lava domes dot its outer flanks. The Molodoy Shiveluch lava-dome complex was constructed during the Holocene within the large horseshoe-shaped caldera; Holocene lava dome extrusion also took place on the flanks of Stary Shiveluch.

At least 60 large eruptions have occurred during the Holocene, making it the most vigorous andesitic volcano of the Kuril-Kamchatka arc. Widespread tephra layers from these eruptions have provided valuable time markers for dating volcanic events in Kamchatka.

Frequent collapses of dome complexes, most recently in 1964, have produced debris avalanches whose deposits cover much of the floor of the breached caldera. (GVP)

Featured image: Eruption of Sheveluch volcano, Kamchatka, Russia on August 4, 2017. Credit: IV FEB RAS, KVERT

If you value what we do here, open your ad-free account and support our journalism.

Share:

Related articles

Producing content you read on this website takes a lot of time, effort, and hard work. If you value what we do here, select the level of your support and register your account.

Your support makes this project fully self-sustainable and keeps us independent and focused on the content we love to create and share.

All our supporters can browse the website without ads, allowing much faster speeds and a clean interface. Your comments will be instantly approved and you’ll have a direct line of communication with us from within your account dashboard. You can suggest new features and apps and you’ll be able to use them before they go live.

You can choose the level of your support.

Stay kind, vigilant and ready!

$5 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$50 /year

$10 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$100 /year

$25 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$200 /year

You can also support us by sending us a one-off payment using PayPal:

Leave a reply

Your email address will not be published.