Estimation of surface deformation due to Pasni earthquake using RADAR interferometry
2019; Taylor & Francis; Volume: 36; Issue: 14 Linguagem: Inglês
10.1080/10106049.2019.1661031
ISSN1752-0762
AutoresMuhammad Ali, Muhammad Imran Shahzad, Majid Nazeer, Irfan Mahmood, Ibrahim Zia,
Tópico(s)Remote Sensing and LiDAR Applications
ResumoThis study analyzed the land deformation associated with Mw 6.3 earthquake along Pasni coast, Pakistan. Post-earthquake widespread surface displacements were found using Sentinel-1 data. Pre, Co and Post-seismic images were used to investigate the deformation trends. Before the earthquake, 89.65% of Pasni land mass showed uplifting from 0.0 to 3.0 cm at 1.00 mm/day while 3.0 cm subsidence was noted in 86.36% of the land mass after the earthquake at 2.5 mm/day. However, two weeks after the earthquake, 72.9% Pasni land mass showed uplifting at an unprecedented rate of 3.3 mm/day. The maximum deformation along the Line Of Sight (LOS) direction in co-seismic time was about -4.0 cm. Azimuthal interferogram showed more complex displacement pattern with both negative and positive displacements between ±5.0 cm. Pasni is already facing many problems due to increased sea water intrusion under prevailing climatic changes and land deformation due to strong earthquakes.
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