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Integrated Electrical Resistivity Tomography and SPAC Microtremor for Local Site Response Assessment toward Sustainable Disaster Risk Reduction: A Case Study of Setiling Village, Central Lombok Syarifatul Ulfah; Muhamad Yamin; Bagus Widhi Dharma S.
Jurnal Penelitian Pendidikan IPA Vol 12 No 7 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i7.15759

Abstract

Local geological conditions strongly influence seismic-wave propagation and earthquake ground response, particularly in heterogeneous volcanic environments. This study aimed to characterize shallow subsurface conditions and assess local seismic site response in Setiling Village, Central Lombok, Indonesia, by integrating two-dimensional Electrical Resistivity Tomography (ERT) using the Wenner–Schlumberger configuration with Spatial Autocorrelation (SPAC)-based microtremor analysis. Three ERT profiles and twenty SPAC measurement points were acquired to evaluate subsurface heterogeneity and near-surface stiffness. The ERT results revealed significant resistivity variations associated with volcanic lithology, weathering intensity, moisture content, and groundwater conditions. Conductive zones (<100 Ωm) were interpreted as highly weathered volcanic deposits, whereas higher resistivity zones (>600 Ωm) represented relatively competent volcanic materials. SPAC-derived Vs30 values ranged from 150 to 525 m/s, corresponding to NEHRP Site Classes C, D, and E. Integrated interpretation demonstrated a consistent relationship between resistivity and Vs30, indicating that progressive volcanic weathering simultaneously reduces electrical resistivity and subsurface stiffness. The integrated ERT–SPAC approach provides a reliable framework for village-scale seismic site characterization, supporting seismic hazard assessment, risk-informed spatial planning, resilient infrastructure development, and disaster risk reduction in tropical volcanic regions.
Co-Authors Adipta, Marazaenal Adriana, I Gde Sukanti Afriansyah, M. Agus Catur Pramite Agus Winardi Agus Winardi Agus Winardi Ahmad Fatoni Dwi Putra ALFREDO VINCENSIUS DOWA BILLY AMINULLAH AMINULLAH Aminullah Aminullah, Aminullah Andreas Kanda Wonda ANDRIA FIRMANSYAH BATARA Anggarista, Randa APRIANI, TITIN APRILIA KII WENAMAYA ARDIKA, GEDE TUSAN ARIANTO ARIANTO Asno Azzawagama Firdaus Bagus Widhi Dharma S Bagus Widhi Dharma S. Bagus Widhi Dharma S. Dharma S. BAIQ RENI SARI DEWI DAVID BILI DEWI, NI MADE NIA BUNGA SURYA DWI SULISTIA DIA ANGRAENI Eti Sulandari Giatma Dwijuna Ahadi Hendrawan Hignasari, L.Virginayoga I GEDE KEMULANDANA I Gusti Ngurah Octova Seventilofa I Putu Sriartha Isnaeni Isnaeni Isnaeni Isnaeni Isnasari, Wiriyanti Jannah, Nikmatul Joni Saputra Kumoro, Danang Tejo Kusmianti Kusmianti LOILEWEN, ALINE FEBRIANY Malo, Agata Masitha Maghfirah Mawardi, Muh Mudana, Wayan NI MADE NIA BUNGA SURYA DEWI NI MADE NIA BUNGA SURYA DEWI NOVRIANSYAH MAULANA Pageh, Made Pratama, Ramadhana Agung Putra, I Gede Maji Arya Duta Edy Rahman Rahman Rahman Rahman Rahman Ramli Ramli ROBINSIUS KARABA LUDJI Rukayah SABRINI AL QAUTSAR Samsiniwati, Baiq Yayuk Samsiniwati Seniari, Ni Made Seventilova, I G N Octava Sri Dewi, Ratna Sujendra, I Nengah Eka Suta, I Gede Junianta Syafaruddin AS, Syafaruddin Syahrani Lonang Syarifatul Ulfah Syarifatul Ulfah Syuhada, Fahmi Tahir, Muh. Tarmizi TITAWATI, TITIN TJOK ISTRI WIDYANI UTAMI DEWI SUDIRA Ulfa, Syarifatul Ulfah, Syarifatul Wicaksana, I Gede Arya Winardi, Agus Wiriyanti Isnasari Wiriyanti Isnasari Wirriyanti Isnasari YOHANIS DAPPA Yuan Sa’adati Zamah Sari Zarkashi, Rokyan