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Volcanic Unrest After the 2021 Eruption of La Palma
被引:2
|作者:
Fernandez, Jose
[1
]
Escayo, Joaquin
[1
,2
]
Prieto, Juan F.
[3
]
Tiampo, Kristy F.
[4
]
Camacho, Antonio G.
[1
]
Ancochea, Eumenio
[5
]
机构:
[1] UCM, Inst Geociencias CSIC, Madrid, Spain
[2] Univ Politecn Madrid, ETS Ingn Topog Geodesia & Cartog, Madrid, Spain
[3] Univ Politecn Madrid, ETS Ingn Topog Geodesia & Cartog, Madrid, Spain
[4] Univ Colorado, Cooperat Inst Res Environm Sci CIRES, Boulder, CO USA
[5] Univ Complutense Madrid, Fac CC Geol, Dept Mineral & Petrol, Madrid, Spain
关键词:
volcanic unrest;
La Palma;
InSAR;
interpretation methodology;
magmatic intrusion;
DEFORMATION;
D O I:
10.1029/2024GL108803
中图分类号:
P [天文学、地球科学];
学科分类号:
07 ;
摘要:
La Palma, Canary Islands, had its largest historical eruption in 2021. From January 2022 to May 2023 there were >2,100 seismic events, primarily at depths <= 20 km, prompting us to update the deformation and modeling study, using interferometric synthetic aperture radar observations and a last generation interpretation tool. We detect the evolution of the remaining magmatic body in the SW portion of the island, with arrival of new magma moving into the oceanic crust out to sea, and a pressurized zone in the central-eastern area, at regions of structural weakness. The current source characteristics have some similarities to the early stage dynamics prior to the 2021 eruption. Operational and multidisciplinary studies must continue to monitor either their stabilization or growth and destabilization. The ability to identify magma ascent using only deformation data over short time periods allows us to characterize unrest patterns and provide new insights into volcanic processes.
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