Constructive and Destructive Processes During the 2018–2019 Eruption Episode at Shiveluch Volcano, Kamchatka, Studied From Satellite and Aerial Data
نویسندگان
چکیده
Dome-building volcanoes often develop by intrusion and extrusion, recurrent destabilization sector collapses, renewed volcanic growth inside the collapse embayment. However, details of structural architecture affiliated with activity influences regional structures remain poorly understood. Here, we analyze recent Shiveluch volcano, Kamchatka Peninsula, characterized repeated episodes lava dome destruction due to large explosions gravity-driven collapses. We collect process a multisensor dataset comprising high-resolution optical (aerial tri-stereo Pleiades satellite), radar (TerraSAR-X TanDEM-X satellites), thermal MODIS, Sentinel-2, Landsat 8 satellites) data. investigate evolution 2018–2019 eruption episode evaluate morphological changes that led August 29, 2019 explosive partial collapse. Our results show new massive lobe gradually extruded onto SW flank dome, concurrent magmatic into eastern sector, adding 0.15 km 3 complex. As amphitheater infilled, craters emerged along SW-NE alignment close rim. Then, occurred, followed collapse, which was initially directed away from this trend. The removed 0.11 edifice formation central SW-NE-elongated crater dimensions 430 m × 490 m, scar at part pyroclastic density currents traveled ?12 downslope. This work sheds light on dominated lineament complex interplay volcano constructive destructive processes. conceptual model emphasizing relevance trends, namely, 1) SW-NE-oriented (possibly regional) structure 2) infilled its decollement surface, both are vital for understanding directions assessing potential hazards dome-building elsewhere.
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ژورنال
عنوان ژورنال: Frontiers in Earth Science
سال: 2021
ISSN: ['2296-6463']
DOI: https://doi.org/10.3389/feart.2021.680051