Abstract

DARAWCHEH, Ryad; GHAZZI, Riad Al  and  ABDUL-WAHED, Mohamad Khir. Empirical relationship for assessing the near-field horizontal coseismic displacement using GPS Seismology data. Geofís. Intl [online]. 2021, vol.60, n.1, pp.31-50.  Epub Jan 31, 2022. ISSN 2954-436X.  https://doi.org/10.22201/igeof.00167169p.2021.60.1.2025.

In this research, a data set of horizontal GPS coseismic displacement in the near-field has been assembled around the world to investigate a potential relationship between the GPS coseismic displacement and the earthquake parameters. Regression analyses have been applied to the data of 120 interplate earthquakes with magnitude (Mw 4.8-9.2). A preliminary empirical relationship for prediction near-field horizontal GPS coseismic displacement as a function of moment magnitude and the distance between hypocenter and near field GPS station has been established using the multi regression analysis. The obtained relationship has been preliminarily applied to assessing the coseismic displacements associated with some large historical earthquakes occurred along the Dead Sea fault system. Such a global relationship could be worldwide useful for assessing the coseismic displacement at any point around the active faults.

Keywords : GPS coseismic displacement; GPS seismology; multi regression analysis; Dead Sea fault system.