| Titre | Short-term surface deformation on the Northern Hayward Fault CA, and nearby landslides using polarimetric SAR interferometry (PolInSAR) |
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| Auteur | Alipour, S; Tiampo, K F; Samsonov, S V ; Gonzalez, P J |
| Source | Pure and Applied Geophysics vol. 172, issue 8, 2015 p. 1-15, https://doi.org/10.1007/s00024-013-0747-x |
| Image |  |
| Année | 2015 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20150200 |
| Éditeur | Springer Nature |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1007/s00024-013-0747-x |
| Media | papier; numérique; en ligne |
| Formats | pdf |
| Région | Northern Hayward Fault; Berkeley; California |
| Lat/Long OENS | -122.2972 -122.2047 37.8828 37.8569 |
| Sujets | télédétection; glissements de terrain; dépôts de glissement de terrain; déformation; fluage; géophysique |
| Illustrations | cartes de localisation; images; graphiques |
| Diffusé | 2013 12 10 |
| Résumé | (disponible en anglais seulement)
In this study, we analyze 25 RADARSAT-2 images from ascending and descending geometries to study the creep rate on the Hayward fault and landslide motions near
Berkeley, CA. We applied a coherence optimization technique from polarimetric synthetic aperture radar interferometry (PolInSAR) to increase the accuracy of the measurements. We resolve 3-5 mm/year of motion along the Hayward fault, in agreement with
earlier creep estimates. We identify a potential motion on secondary fault, northeast and parallel to the Hayward fault, which is creeping at a lower rate of *1.5 mm/year. In addition, we identify a number of landslides along the hills east of the
fault that agree with earlier results from advanced interferometric synthetic aperture radar (SAR) analysis and field investigations. We investigate four particular slope instabilities, one of which was marked as moderately active, and three as
highly active, by earlier field investigations. The resolved along-hill slope displacement is estimated at *23 mm/year. Our results demonstrate that PolInSAR is an effective method to increase the interferometric coherence and provide improved
resolution of deformation features associated with natural hazards. |
| GEOSCAN ID | 296900 |
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