·

Powerful eruption observed at Shiveluch, Kamchatka – Russia

powerful-eruption-observed-at-shiveluch-kamchatka-russia

A powerful eruption was observed at Russian Shiveluch volcano at 00:41 UTC on September 24, 2014. Ash plume rose up to 11 km (38 000 feet) altitude.

The eruption generated several pyroclastic flows, some of which surpassed the 350 m high western caldera wall.

The explosion could have been a result of gas pressure that slowly build up under the lava dome's plug of viscous lava, VolcanoDiscovery said.

Alert level was set to red following the eruption, and lowered back to orange afterwards as no new eruptions followed and the ash had dissipated.

According to KVERT's notification issued 06:13 UTC on September 24, the explosive activity of the volcano was finished but ash cloud in size 144×89 km (89×55 miles) continued to move to the north-northeast of the volcano. Satellite data showed this ash cloud was in 23 km (14 miles) of the volcano at 03:48 UTC on September 24.

"It is necessary to say a part of this ash cloud in size 90×26 km (56×16 miles) is drifting at the height about 9 km (29 500 feet) a.s.l. in the distance about 71 km (44 miles) a.s.l. to the north-east of the volcano."

Eruption plume from Shiveluch's explosion on September 24, 2014. Copyright: Y. Demyanchuk/Volkstat.ru

During September 12 – 19, 2014, KVERT reported that during lava-dome extrusion onto Shiveluch’s N flank was accompanied by ash explosions, incandescence, hot avalanches, and fumarolic activity. Satellite images detected a daily thermal anomaly over the dome. On September 14 a video camera recorded a short-duration explosion which produced an ash plume that rose 6 km (19 700 ft) a.s.l.; strong gas-and-steam activity was noted afterwards.

Geologic summary

The high, isolated massif of Shiveluch volcano (also spelled Sheveluch) rises above the lowlands NNE of the Kliuchevskaya volcano group. The 1300 cu km Shiveluch 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 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 of Shiveluch 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.

Featured image: Eruption plume from Shiveluch's explosion on September 24, 2014. Copyright: Y. Demyanchuk/Volkstat.ru

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

Share:


Your support makes a difference

Dear valued reader,

We hope that our website has been a valuable resource for you.

The reality is that it takes a lot of time, effort, and resources to maintain and grow this website. We rely on the support of readers like you to keep providing high-quality content.

If you have found our website to be helpful, please consider making a contribution to help us continue to bring you the information you need. Your support means the world to us and helps us to keep doing what we love.

Support us by choosing your support level – Silver, Gold or Platinum. Other support options include Patreon pledges and sending us a one-off payment using PayPal.

Thank you for your consideration. Your support is greatly appreciated.

Sincerely,
Teo Blašković

$5 /month

  • Ad-free account
  • Clean user interface and fast browsing
  • Direct communication with us via chat and email
  • Suggest new features, content and applications
  • Early access to new apps and features

$50 /year

$10 /month

  • Ad-free account
  • Clean user interface and fast browsing
  • Direct communication with us via chat and email
  • Suggest new features, content and applications
  • Early access to new apps and features

$100 /year

$25 /month

  • Ad-free account
  • Clean user interface and fast browsing
  • Direct communication with us via chat and email
  • Suggest new features, content and applications
  • Early access to new apps and features

$200 /year

You can also support us on Patreon

support us on patreon

or by sending us a one-off payment using PayPal:


Commenting rules and guidelines

We value the thoughts and opinions of our readers and welcome healthy discussions on our website. In order to maintain a respectful and positive community, we ask that all commenters follow these rules:

  • Treat others with kindness and respect.
  • Stay on topic and contribute to the conversation in a meaningful way.
  • Do not use abusive or hateful language.
  • Do not spam or promote unrelated products or services.
  • Do not post any personal information or content that is illegal, obscene, or otherwise inappropriate.

We reserve the right to remove any comments that violate these rules. By commenting on our website, you agree to abide by these guidelines. Thank you for helping to create a positive and welcoming environment for all.

2 Comments

Leave a reply

Your email address will not be published. Required fields are marked *