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Lava flow morphology at an erupting andesitic stratovolcano: A satellite perspective on El Reventador, Ecuador

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Lava flow morphology at an erupting andesitic stratovolcano : A satellite perspective on El Reventador, Ecuador. / Arnold, D. W.D.; Biggs, J.; Dietterich, H. R.; Vallejo Vargas, S.; Wadge, G.; Mothes, P.

In: Journal of Volcanology and Geothermal Research, Vol. 372, 15.02.2019, p. 34-47.

Research output: Contribution to journalArticle

Harvard

Arnold, DWD, Biggs, J, Dietterich, HR, Vallejo Vargas, S, Wadge, G & Mothes, P 2019, 'Lava flow morphology at an erupting andesitic stratovolcano: A satellite perspective on El Reventador, Ecuador', Journal of Volcanology and Geothermal Research, vol. 372, pp. 34-47. https://doi.org/10.1016/j.jvolgeores.2019.01.009

APA

Arnold, D. W. D., Biggs, J., Dietterich, H. R., Vallejo Vargas, S., Wadge, G., & Mothes, P. (2019). Lava flow morphology at an erupting andesitic stratovolcano: A satellite perspective on El Reventador, Ecuador. Journal of Volcanology and Geothermal Research, 372, 34-47. https://doi.org/10.1016/j.jvolgeores.2019.01.009

Vancouver

Arnold DWD, Biggs J, Dietterich HR, Vallejo Vargas S, Wadge G, Mothes P. Lava flow morphology at an erupting andesitic stratovolcano: A satellite perspective on El Reventador, Ecuador. Journal of Volcanology and Geothermal Research. 2019 Feb 15;372:34-47. https://doi.org/10.1016/j.jvolgeores.2019.01.009

Author

Arnold, D. W.D. ; Biggs, J. ; Dietterich, H. R. ; Vallejo Vargas, S. ; Wadge, G. ; Mothes, P. / Lava flow morphology at an erupting andesitic stratovolcano : A satellite perspective on El Reventador, Ecuador. In: Journal of Volcanology and Geothermal Research. 2019 ; Vol. 372. pp. 34-47.

Bibtex

@article{6a833a8ac480414abed99221a624a3b9,
title = "Lava flow morphology at an erupting andesitic stratovolcano: A satellite perspective on El Reventador, Ecuador",
abstract = "Lava flows pose a significant hazard to infrastructure and property located close to volcanoes, and understanding how flows advance is necessary to manage volcanic hazard during eruptions. Compared to low-silica basaltic flows, flows of andesitic composition are infrequently erupted and so relatively few studies of their characteristics and behaviour exist. We use El Reventador, Ecuador as a target to investigate andesitic lava flow properties during a 4.5 year period of extrusive eruption between February 2012 and August 2016. We use satellite radar to map the dimensions of 43 lava flows and look at variations in their emplacement behaviour over time. We find that flows descended the north and south flanks of El Reventador, and were mostly emplaced over durations shorter than the satellite repeat interval of 24 days. Flows ranged in length from 0.3 to 1.7 km, and the length of flows generally decreased over the observation period. We measure a decrease in flow volume with time that is correlated with a long-term exponential decrease in effusion rate, and propose that this behaviour is caused by temporary magma storage in the conduit acting as magma capacitor between the magma reservoir and the surface. We use the dimensions of flow lev{\'e}es and widths to estimate the flow yield strengths. We observe that some flows were diverted by topographic obstacles, and compare measurements of decreased channel width and increased flow thickness at the obstacles with observations from laboratory experiments. Radar observations, such as those presented here, could be used to map and measure properties of evolving lava flow fields at other remote or difficult to monitor volcanoes.",
keywords = "Lava flows, Radar amplitude, SAR",
author = "Arnold, {D. W.D.} and J. Biggs and Dietterich, {H. R.} and {Vallejo Vargas}, S. and G. Wadge and P. Mothes",
year = "2019",
month = "2",
day = "15",
doi = "10.1016/j.jvolgeores.2019.01.009",
language = "English",
volume = "372",
pages = "34--47",
journal = "Journal of Volcanology and Geothermal Research",
issn = "0377-0273",
publisher = "Elsevier B.V.",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Lava flow morphology at an erupting andesitic stratovolcano

T2 - A satellite perspective on El Reventador, Ecuador

AU - Arnold, D. W.D.

AU - Biggs, J.

AU - Dietterich, H. R.

AU - Vallejo Vargas, S.

AU - Wadge, G.

AU - Mothes, P.

PY - 2019/2/15

Y1 - 2019/2/15

N2 - Lava flows pose a significant hazard to infrastructure and property located close to volcanoes, and understanding how flows advance is necessary to manage volcanic hazard during eruptions. Compared to low-silica basaltic flows, flows of andesitic composition are infrequently erupted and so relatively few studies of their characteristics and behaviour exist. We use El Reventador, Ecuador as a target to investigate andesitic lava flow properties during a 4.5 year period of extrusive eruption between February 2012 and August 2016. We use satellite radar to map the dimensions of 43 lava flows and look at variations in their emplacement behaviour over time. We find that flows descended the north and south flanks of El Reventador, and were mostly emplaced over durations shorter than the satellite repeat interval of 24 days. Flows ranged in length from 0.3 to 1.7 km, and the length of flows generally decreased over the observation period. We measure a decrease in flow volume with time that is correlated with a long-term exponential decrease in effusion rate, and propose that this behaviour is caused by temporary magma storage in the conduit acting as magma capacitor between the magma reservoir and the surface. We use the dimensions of flow levées and widths to estimate the flow yield strengths. We observe that some flows were diverted by topographic obstacles, and compare measurements of decreased channel width and increased flow thickness at the obstacles with observations from laboratory experiments. Radar observations, such as those presented here, could be used to map and measure properties of evolving lava flow fields at other remote or difficult to monitor volcanoes.

AB - Lava flows pose a significant hazard to infrastructure and property located close to volcanoes, and understanding how flows advance is necessary to manage volcanic hazard during eruptions. Compared to low-silica basaltic flows, flows of andesitic composition are infrequently erupted and so relatively few studies of their characteristics and behaviour exist. We use El Reventador, Ecuador as a target to investigate andesitic lava flow properties during a 4.5 year period of extrusive eruption between February 2012 and August 2016. We use satellite radar to map the dimensions of 43 lava flows and look at variations in their emplacement behaviour over time. We find that flows descended the north and south flanks of El Reventador, and were mostly emplaced over durations shorter than the satellite repeat interval of 24 days. Flows ranged in length from 0.3 to 1.7 km, and the length of flows generally decreased over the observation period. We measure a decrease in flow volume with time that is correlated with a long-term exponential decrease in effusion rate, and propose that this behaviour is caused by temporary magma storage in the conduit acting as magma capacitor between the magma reservoir and the surface. We use the dimensions of flow levées and widths to estimate the flow yield strengths. We observe that some flows were diverted by topographic obstacles, and compare measurements of decreased channel width and increased flow thickness at the obstacles with observations from laboratory experiments. Radar observations, such as those presented here, could be used to map and measure properties of evolving lava flow fields at other remote or difficult to monitor volcanoes.

KW - Lava flows

KW - Radar amplitude

KW - SAR

UR - http://www.scopus.com/inward/record.url?scp=85060768784&partnerID=8YFLogxK

U2 - 10.1016/j.jvolgeores.2019.01.009

DO - 10.1016/j.jvolgeores.2019.01.009

M3 - Article

AN - SCOPUS:85060768784

VL - 372

SP - 34

EP - 47

JO - Journal of Volcanology and Geothermal Research

JF - Journal of Volcanology and Geothermal Research

SN - 0377-0273

ER -