Application of 2D spatial imaging method for identification of a fault lines and subsurface landslide at “Taman Unnes”, Semarang, IndonesiaLashari Lashari, Rini Kusumawardani, Togani Cahyadi Upomo, Supriyadi Supriyadi and Ajiwirani MugiayulhaqMATEC Web Conf., 258 (2019) 03005DOI: https://doi.org/10.1051/matecconf/201925803005