Dynamics of the Bilchenok Surging Glacier in the Klyuchevskaya Volcano Group

Муравьев, Я Д; Tsvetkov, D. G.; Муравьев, А. Я.; Осипова, Г. Б.

doi:10.15356/2076-6734-2012-2-

Cited by 5 publications

(4 citation statements)

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“…Figure S10 shows the distribution in which the sources classified as “earthquakes” (i.e., impulsive individual events) were added. The only notable difference is the appearance of very shallow events northwest of Ushkovsky volcano that might be related to the presence of actively moving glaciers in this region ( 33 ). At the same time, the imaged active plumbing system in the midlower crust remains essentially unchanged.…”

Section: Resultsmentioning

confidence: 99%

Seismic tremor reveals active trans-crustal magmatic system beneath Kamchatka volcanoes

et al. 2022

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The occurrence and the style of volcanic eruptions are largely controlled by the ways in which magma is stored and transported from the mantle to the surface through the crust. Nevertheless, our understanding of the deep roots of volcano-magmatic systems remains very limited. Here, we use the sources of seismovolcanic tremor to delineate the active part of the magmatic system beneath the Klyuchevskoy Volcanic Group in Kamchatka, Russia. The tremor sources are distributed in a wide spatial region over the whole range of crustal depths connecting different volcanoes of the group. The tremor activity is characterized by rapid vertical and lateral migrations explained by fast pressure transients and dynamic permeability. Our results support the conceptual model of extended and highly dynamic trans-crustal magmatic systems.

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Section: Resultsmentioning

confidence: 99%

Seismic tremor reveals active trans-crustal magmatic system beneath Kamchatka volcanoes

et al. 2022

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“…As a result of these investigations, some of the glaciers in the Central Kamchatka Depression have been documented as "surge-type" (Vinogradov et al, 1985). For example, Bilchenok glacier (56.100 • N, 160.482 • E) in the Klyuchevskaya volcanic group is known to have surged ∼ 2 km in 1959/1960 and again in 1982/84 (Muraviev et al, 2012). In this example, surging appears unrelated to climate and is likely driven by the strengthening of seismic activity at Ushkovsky Volcano (56.069 • N, 160.467 • E), upon which the glacier sits (Muraviev et al, 2012 Barr and Solomina, 2014).…”

Section: Glaciersmentioning

confidence: 95%

“…This might reflect the comparatively short time period considered or may be a reflection of volcanically controlled surging (see Sect. 2.3) (Muraviev et al, 2012), which therefore lacks periodicity.…”

Section: Volcanic Controls and Debris Covermentioning

confidence: 99%

Rapid glacial retreat on the Kamchatka Peninsula during the early 21st century

et al. 2016

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Abstract. Monitoring glacier fluctuations provides insights into changing glacial environments and recent climate change. The availability of satellite imagery offers the opportunity to view these changes for remote and inaccessible regions. Gaining an understanding of the ongoing changes in such regions is vital if a complete picture of glacial fluctuations globally is to be established. Here, satellite imagery (Landsat 7, 8 and ASTER) is used to conduct a multi-annual remote sensing survey of glacier fluctuations on the Kamchatka Peninsula (eastern Russia) over the 2000-2014 period. Glacier margins were digitised manually and reveal that, in 2000, the peninsula was occupied by 673 glaciers, with a total glacier surface area of 775.7 ± 27.9 km 2 . By 2014, the number of glaciers had increased to 738 (reflecting the fragmentation of larger glaciers), but their surface area had decreased to 592.9 ± 20.4 km 2 . This represents a ∼ 24 % decline in total glacier surface area between 2000 and 2014 and a notable acceleration in the rate of area loss since the late 20th century. Analysis of possible controls indicates that these glacier fluctuations were likely governed by variations in climate (particularly rising summer temperatures), though the response of individual glaciers was modulated by other (non-climatic) factors, principally glacier size, local shading and debris cover.

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“…For example, Glaciar Amarillo retreated ~ 76 m yr -1 between 1961and 2007, but advanced 243 ± 49 m between November 2007 (coinciding with the period of subglacial geothermal heating), after which, glacier retreat resumed . At Ushkovsky, strengthening of seismic (and perhaps volcanic) activity is thought to have caused Bilchenok Glacier (which emanates from the NW corner of the ice-filled caldera) to advance by 1050m and 700-800 m in 1959-1960 and 1982-84, respectively (Muraviev et al, , 2012. Finally, at Mount Kazbek, periods of increased subglacial volcanic and/or geothermal activity may have caused the acceleration, advance, and destabilisation of local glaciers at various periods during the 20 th and 21 st centuries (Chernomorets et al, 2007).…”

Section: Glacier Advance And/or Accelerationmentioning

confidence: 99%

Volcanic impacts on modern glaciers: A global synthesis

Barr

Lynch

Mullan

et al. 2018

Earth-Science Reviews

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Volcanic activity can have a notable impact on glacier behaviour (dimensions and dynamics). This is evident from the palaeo-record, but is often difficult to observe for modern glaciers. However, documenting and, if possible, quantifying volcanic impacts on modern glaciers is important if we are to predict their future behaviour (including crucial ice masses such as the West Antarctic Ice Sheet) and to monitor and mitigate glacio-volcanic hazards such as floods (including jökulhlaups) and lahars. This review provides an assessment of volcanic impacts on the behaviour of modern glaciers (since AD 1800) by presenting and summarising a global dataset of documented examples. The study reveals that shorter-term (days-to-months) impacts are typically destructive, while longer-term (years-to-decades) are more likely protective (e.g., limiting climatically driven ice loss). However, because these events are difficult to observe, particularly before the widespread availability of global satellite data, their 2 frequency and importance are likely underestimated. The study also highlights that because the frequency and nature of volcano-glacier interactions may change with time (e.g., glacier retreat may lead to an increase in explosive volcanic activity), predicting their future importance is difficult. Fortunately, over coming years, continued improvements in remotely sensed data will increase the frequency, and enhance the quality, of observations of volcanic impacts on glaciers, allowing an improved understanding of their past and future operation.

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Dynamics of the Bilchenok Surging Glacier in the Klyuchevskaya Volcano Group

Cited by 5 publications

References 0 publications

Seismic tremor reveals active trans-crustal magmatic system beneath Kamchatka volcanoes

Seismic tremor reveals active trans-crustal magmatic system beneath Kamchatka volcanoes

Rapid glacial retreat on the Kamchatka Peninsula during the early 21st century

Volcanic impacts on modern glaciers: A global synthesis

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