Language : English

Journal Publications

Continent-Wide 2-D Co-Seismic Deformation of the 2015 Mw 8.3 Illapel, Chile Earthquake Derived from Sentinel-1A Data: Correction of Azimuth Co-Registration Error

Impact Factor:4.848

DOI number:10.3390/rs8050376

Affiliation of Author(s):测绘与遥感科学系

Journal:Remote Sensing

Key Words:Illapel Earthquake; Sentinel-1A; Spectral Diversity; InSAR 2D Deformation.

Abstract:In this study, we mapped the co-seismic deformation of the 2015 Mw 8.3 Illapel, Chile earthquake with multiple Sentinel-1A TOPS data frames from both ascending and descending geometries. To meet the requirement of very high co-registration precision, an improved spectral diversity method was proposed to correct the co-registration slope error in the azimuth direction induced by multiple Sentinel-1A TOPS data frames. All phase jumps that appear in the conventional processing method have been corrected after applying the proposed method. The 2D deformation fields in the east-west and vertical directions are also resolved by combing D-InSAR and Offset Tracking measurements. The results reveal that the east-west component dominated the 2D displacement, where up to 2 m displacement towards the west was measured in the coastal area. Vertical deformations ranging between -0.25 and 0.25 m were found. The 2D displacements imply the collision of the Nazca plate squeezed the coast, which shows good accordance with the geological background of the region.

Indexed by:Journal paper

Document Code:376


First-Level Discipline:Surveying and Mapping

Document Type:J



Translation or Not:no

Included Journals:SCI

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