Geodetic Study of the 2006–2010 Ground Deformation in La Palma (Canary Islands): Observational Results

Remote Sensing

Gema Rodríguez-Velasco¹  Eumenio Ancochea²  JuanF. Prieto³  Alfredo Aparicio⁴  AntonioG. Camacho⁴  Joaquín Escayo⁴  José Fernández⁴  Mimmo Palano⁵ 

[1] Departamento de Física de la Tierra y Astrofísica, Unidad Departamental Astronomía y Geodesia, Universidad Complutense de Madrid, Fac. C. Matemáticas, Plaza de Ciencias, 3, 28040 Madrid, Spain;Departamento de Mineralogía y Petrología, Fac. CC. Geológicas, Universidad Complutense de Madrid, 28040 Madrid, Spain;E.T.S. de Ingenieros en Topografía, Geodesia y Cartografía, Universidad Politécnica de Madrid, 28031 Madrid, Spain;Instituto de Geociencias (CSIC, UCM), C/ Doctor Severo Ochoa, No. 7. Ciudad Universitaria, 28040 Madrid, Spain;Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo—Sezione di Catania, Piazza Roma 2, 95125 Catania, Italy;

关键词: A-DInSAR;    GNSS;    gravimetry;    La Palma;    Canary Islands;    volcanic unrest;   

DOI  :  10.3390/rs12162566

来源: DOAJ

【 摘 要 】

La Palma is one of the youngest of the Canary Islands, and historically the most active. The recent activity and unrest in the archipelago, the moderate seismicity observed in 2017 and 2018 and the possibility of catastrophic landslides related to the Cumbre Vieja volcano have made it strongly advisable to ensure a realistic knowledge of the background surface deformation on the island. This will then allow any anomalous deformation related to potential volcanic unrest on the island to be detected by monitoring the surface deformation. We describe here the observation results obtained during the 2006–2010 period using geodetic techniques such as Global Navigation Satellite System (GNSS), Advanced Differential Synthetic Aperture Radar Interferometry (A-DInSAR) and microgravimetry. These results show that, although there are no significant associated variations in gravity, there is a clear surface deformation that is spatially and temporally variable. Our results are discussed from the point of view of the unrest and its implications for the definition of an operational geodetic monitoring system for the island.

【 授权许可】

Unknown