DOI: 10.1016/j.epsl.2021.116906
论文题名: Monitoring and forecasting hazards from a slow growing lava dome using aerial imagery, tri-stereo Pleiades-1A/B imagery and PDC numerical simulation
作者: Moussallam Y. ; Barnie T. ; Amigo Á. ; Kelfoun K. ; Flores F. ; Franco L. ; Cardona C. ; Cordova L. ; Toloza V.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 564 语种: 英语
中文关键词: dome collapse
; dome growth
; photogrammetry
; pyroclastic flow
; structure from motion
; volcanic dome
英文关键词: Aerial photography
; Antennas
; Domes
; Hazards
; Life cycle
; Photogrammetry
; Stereo image processing
; Aerial imagery
; Dome collapse
; Dome growth
; Effusion rates
; Lava dome
; Positive correlations
; Pyroclastic density currents
; Pyroclastic flows
; Structure from motion
; Volcanic dome
; Volcanoes
; aerial photography
; image analysis
; lava dome
; numerical model
; photogrammetry
; pyroclastic flow
; satellite data
; satellite imagery
; volcanic eruption
; volcanology
; Bio Bio
; Chile
; Nevados de Chillan
英文摘要: In December of 2017, a lava dome emerged at the Nevados de Chillan volcanic complex in the southern Andean volcanic zone, Chile, at the base of a summit crater excavated by explosions during two preceding years of unrest. This posed a number of potential hazards to the surrounding touristic region, so the eruption was carefully monitored. Structure from Motion techniques were used to generate DEMs from satellite and aerial images, from which several useful measurements could be made. Dome growth was characterised at an unprecedented resolution, allowing for the calculation of discharge rates and effusion rates in near real time. A simple model fit to the distance between the dome and crater rim predicted relatively accurately the arrival of the dome toe at the crater rim and the onset of dome collapse outside the crater. Simulations of the path and extent that potential pyroclastic density currents (PDC) generated by dome collapse would follow showed that PDC were not directly threatening populated areas. Over its life cycle as of August 2019, the dome growth was punctuated by frequent explosions, averaging around 30 per day, one of which generated a minor 600 m long PDC on 13 to 15 of July 2018. There appears to be a positive correlation between explosion frequency and lava dome growth rate suggesting that both explosive and effusive processes can coexist, operating at different timescales but responding to the same driving force. A positive correlation is apparent between dome growth rate and seismic activity such as the frequency of tremor and long-period earthquakes suggesting that these might be used as proxies to estimate effusion rate. Initial lava dome effusion rates of 1730 ± 110 m3/day in January 2018 declined to 100 ± 150 m3/day in June 2019. These growth rates are extremely slow when compared to other lava domes, about 300 to 600 times slower than the lava domes at Mt Unzen (1992) and Mt. St. Helens (1980). © 2021 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165609
Appears in Collections: 气候变化与战略
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作者单位: Lamont-Doherty Earth Observatory, Columbia University, New York, United States; Université Clermont Auvergne, CNRS, IRD, OPGC, Laboratoire Magmas et Volcans, Clermont-Ferrand, F-63000, France; Nordic Volcanological Center, Institute of Earth Sciences, Sturlugata 7 – Askja, Reykjavik, 101, Iceland; Servicio Nacional de Geología y Minería (SERNAGEOMIN), Red Nacional de Vigilancia Volcánica, Santiago, Chile; Observatorio Vulcanológico de los Andes del Sur, Servicio Nacional de Geología y Minería, Temuco, 03850, Chile
Recommended Citation:
Moussallam Y.,Barnie T.,Amigo Á.,et al. Monitoring and forecasting hazards from a slow growing lava dome using aerial imagery, tri-stereo Pleiades-1A/B imagery and PDC numerical simulation[J]. Earth and Planetary Science Letters,2021-01-01,564