| Titre | Land subsidence, ground fissures and buried faults: InSAR monitoring of Ciudad Guzmán (Jalisco, Mexico) |
| |
| Auteur | Brunori, C A; Bignami, C; Albano, M; Zucca, F; Samsonov, S ; Groppelli, G; Norini, G; Saroli, M; Stramondo, S |
| Source | Remote Sensing and Digital Image Processing vol. 7, 7, 2015 p. 8610-8630, https://doi.org/10.3390/rs70708610  Accès ouvert |
| Image |  |
| Année | 2015 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20150197 |
| Éditeur | MDPI AG |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.3390/rs70708610 |
| Media | papier; en ligne; numérique |
| Formats | pdf; html; xml |
| Région | Ciudad Guzmán; Jalisco |
| Lat/Long OENS | -103.4667 -103.4417 19.7083 19.6833 |
| Sujets | affaissement; télédétection; caractéristiques structurales; analyses structurales; failles; fissures; fosses d'effondrement; géophysique; tectonique |
| Illustrations | cartes de localisation; photographies; tableaux; coupes transversales; graphiques |
| Diffusé | 2015 07 07 |
| Résumé | (disponible en anglais seulement)
We study land subsidence processes and the associated ground fissuring, affecting an active graben filled by thick unconsolidated deposits by means of InSAR
techniques and fieldwork. On 21 September 2012, Ciudad Guzmán (Jalisco, Mexico) 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 survey
showed that fissures alignment is coincident with the escarpments produced on 19 September 1985, when a strong earthquake with magnitude 8.1 struck central Mexico. In order to detect and map the spatio-temporal features of the processes that led to
the 2012 ground fissures, we applied InSAR multitemporal techniques to process ENVISAT-ASAR and RADARSAT-2 satellite SAR images acquired between 2003 and 2012. We detect up to 20 mm/year of subsidence of the northwestern part of Ciudad Guzmán. These
incremental movements are consistent with the ground fissures observed in 2012. Based on interferometric results, field data and 2D numerical model, we suggest that ground deformations and fissuring are due to the presence of areal subsidence
correlated with variable sediment thickness and differential compaction, partly driven by the exploitation of the aquifers and controlled by the distribution and position of buried faults. |
| GEOSCAN ID | 296897 |
|
|