Karakterisasi Daerah Rawan Gerakan Tanah di Lapangan Pandanmurti Desa Candigaron Kecamatan Sumowono Kabupaten Semarang dengan Metode Mikrotremor

Abstract

The ground movement in Pandanmurti Field, Candigaron Village, Sumowono Subdistrict, Semarang Regency is in the form of cracked land and some of it has land subsidence. To identify the area of ground movement in the study site, a microtremor survey was conducted using the HVSR method. Based on 2D modeling areas that experience soil movement are characterized by a layer of soil with amplification values greater than 1 with an amplification range of 1-6.5. The dominant frequency of soil layers characterized by research sites has a value of 0.02-0.6 Hz. Based on 3D modeling the separation of the former subsidence with the part that has not subsided is characterized by the discontinuity in the south-southeast with isovalue 1.36 Hz frequency values and areas that do not undergo further deformation are characterized by isovalue amplification values