RT Journal Article
T1 Exploring deformation scenarios in Timanfaya volcanic area (Lanzarote, Canary Islands) from GNSS and ground based geodetic observations
A1 Riccardi, Umberto
A1 Arnoso, J.
A1 Benavent Merchán, María Teresa
A1 Vélez, E.
A1 Tammaro, U.
A1 González Montesinos, Fuensanta
AB We report on a detailed geodetic continuous monitoring in Timanfaya volcanic area (TVA), where the most intense geothermal anomalies of Lanzarote Island are located. We analyze about three years of GNSS data collected on a small network of five permanent stations, one of which at TVA, deployed on the island, and nearly 20 years of tiltmeter and strainmeter records acquired at Los Camelleros site settled in the facilities of the Geodynamics Laboratory of Lanzarote within TVA.This study is intended to contribute to understanding the active tectonics on Lanzarote Island and its origin, mainly in TVA. After characterizing and filtering out the seasonal periodicities related to “non-tectonic” sources from the geodetic records, a tentative ground deformation field is reconstructed through the analysis of both tilt, strain records and the time evolution of the baselines ranging the GNSS stations. The joint interpretation of the collected geodetic data show that the area of the strongest geothermal anomaly in TVA is currently undergoing a SE trending relative displacement at a rate of about 3 mm/year. This area even experiences a significant subsidence with a maximum rate of about 6 mm/year. Moreover, we examine the possible relation between the observed deformations and atmospheric effects by modelling the response functions of temperature and rain recorded in the laboratory. Finally, from the retrieval of the deformation patterns and the joint analysis of geodetic and environmental observations, we propose a qualitative model of the interplaying role between the hydrological systems and the geothermal anomalies. Namely, we explain the detected time correlation between rainfall and ground deformation because of the enhancement of the thermal transfer from the underground heat source driven by the infiltration of meteoric water.
PB Elsevier
YR 2018
FD 2018-05-15
LK https://hdl.handle.net/20.500.14352/93845
UL https://hdl.handle.net/20.500.14352/93845
LA eng
NO Riccardi, U., Arnoso, J., Benavent, M., Vélez, E., Tammaro, U., Montesinos, F.G., 2018. Exploring deformation scenarios in Timanfaya volcanic area (Lanzarote, Canary Islands) from GNSS and ground based geodetic observations. Journal of Volcanology and Geothermal Research 357, 14–24. https://doi.org/10.1016/j.jvolgeores.2018.04.009
DS Docta Complutense
RD 26 abr 2025