Publication Date:
2022-05-06
Description:
This work focuses on the study of land subsidence processes by means of multi-temporal
and multi-frequency InSAR techniques. Specifically, we retrieve the long-term evolution (2003–2018)
of the creeping phenomenon producing ground fissuring in the Ciudad Guzmán (Jalisco state, Mexico)
urban area. The city is located on the northern side of the Volcan de Colima area, one of the most
active Mexican volcanoes. On September 21 2012, Ciudad Guzmán was struck by ground fissures
of about 1.5 km of length, causing the deformation of the roads and the propagation of fissures
in adjacent buildings. The field surveys showed that fissures follow the escarpments produced
during the central Mexico September 19 1985 Mw 8.1 earthquake. We extended the SAR (Synthetic
Aperture Radar) interferometric monitoring starting with the multi-temporal analysis of ENVISAT
and COSMO-SkyMed datasets, allowing the monitoring of the observed subsidence phenomena
a ecting the Mexican city. We processed a new stack of Sentinel-1 TOPSAR acquisition mode images
along both descending and ascending paths and spanning the 2016–2018 temporal period. The
resulting long-term trend observed by satellites, together with data from volcanic bulletin and in situ
surveys, seems to suggest that the subsidence is due to the exploitation of the aquifers and that the
spatial arrangement of ground deformation is controlled by the position of buried faults.
Description:
Published
Description:
id 2246
Description:
2T. Deformazione crostale attiva
Description:
JCR Journal
Keywords:
subsidence
;
multi-temporal analysis
;
PS
;
SBAS
;
InSAR
;
urban monitoring
;
buried faults
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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