Investigation of coseismic liquefaction‐induced ground deformation associated with the 2019 M w 5.8 Mirpur, Pakistan, earthquake using near‐surface electrical resistivity tomography and geological data

Autor: Nabeel Afzal Butt, Syed Ali Turab, Waqar Ali Zafar, Estella A. Atekwana, Muhammad Younis Khan, Muhammad Shahid Riaz, Said Muhammad, Syed Mohsin Abbas, Leonard O. Ohenhen
Rok vydání: 2021
Předmět:
Zdroj: Near Surface Geophysics. 19:169-182
ISSN: 1873-0604
1569-4445
DOI: 10.1002/nsg.12148
Popis: An electrical resistivity tomography survey was conducted to assess the subsurface conditions associated with the coseismic liquefaction phenomenon in the epicentral region following the Mw 5.8 Mirpur earthquake (Pakistan) on 24 September 2019. The Mirpur earthquake produced extensive coseismic liquefaction‐induced surface deformations, including: sand blows, ground failure and lateral spreading along the Upper Jhelum Canal and in the nearby villages. Electrical resistivity data were acquired along three profiles and calibrated with available borehole data. The inverted electrical resistivity tomography profiles reveal three regional geoelectric layers, which consist of an upper 2–‐5‐m‐thick discontinuous zones of medium resistivity values ranging from 25 Ωm to 60 Ωm, underlain by a 7–8‐m‐thick zone of low resistivity ( 100 Ωm). Based on geological and geophysical data, we infer that. (1) disrupted geoelectric layers in the shallow subsurface and spatially extended low electrical resistivity (
Databáze: OpenAIRE
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