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All Journal Jurnal Stasiun Geofisika Sleman (JSGS) Sunan Kalijaga Journal of Physics
Susanti, Dwi Budi
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Earth & Planetary Sciences Education Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

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Identifikasi Nilai Resistivitas Bawah Permukaan Area Longsor Dusun Bengle, Wonogiri : Identification of Subsurface Resistivity Values in the Bengle Hamlet Landslide Area, Wonogiri Khaerunnisa, Icha; Mery S. A., Indar; Affrilianto, Riko; Susanti, Dwi Budi; Suwondo, Wawan Joko; Niyartama, Thaqibul Fikri
Jurnal Stasiun Geofisika Sleman Vol. 3 No. 1 (2025): Jurnal Stasiun Geofisika Sleman (JSGS) - Juni 2025
Publisher : Stasiun Geofisika Kelas I Sleman

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Penelitian ini bertujuan untuk mendeteksi lapisan bawah permukaan daerah Dusun Bengle yang pernah mengalami longsor pada tahun 2017 dengan menggunakan metode geofisika resistivitas dipole-dipole. Pengukuran dilakukan sepanjang transek berarah Barat-Timur sepanjang 160 m. Hasil pengukuran diolah menggunakan perangkat lunak Res2dinv untuk menghasilkan model penampang dua dimensi. Berdasarkan nilai resistivitas dan pengelompokan warna, diduga terdapat tiga lapisan, yaitu: lapisan atas berupa tanah lempung basah dengan nilai resistivitas 2,01-33,6 Ωm pada kedalaman 0-13,5 m, lapisan tengah berupa tanah lempung ter konsolidasi dengan nilai resistivitas 33 ,6-2310 Ωm, dan lapisan bawah berupa batuan dasar dengan nilai resistivitas 2310-38741 Ωm.
Analisis Variasi b-value dan a-value Menggunakan Perangkat Lunak ZMAP Sebagai Indikator Potensi Gempabumi di Wilayah Jawa Timur: Analysis of b-value and a-value Variations Using ZMap Software as an Indicator of Earthquake Potential in the East Java Region Saefurohmah, Mufti; Susanti, Dwi Budi; Sugito, Sugito; Maulita, Ika
Jurnal Stasiun Geofisika Sleman Vol. 3 No. 2 (2025): Jurnal Stasiun Geofisika Sleman (JSGS) - Desember 2025
Publisher : Stasiun Geofisika Kelas I Sleman

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East Java is one of Indonesia's regions with a high level of seismicity due to its proximity to the subduction zone and the presence of active local faults. This study aims to analyze seismotectonic parameters, including a-value and b-value, as indicators of seismicity level and earthquake magnitude–frequency distribution characteristics. The analysis was conducted using the Maximum Likelihood method implemented in ZMAP. The earthquake data were obtained from BMKG and IRIS, covering the period from January 2004 to August 2024. The results indicate that East Java exhibits a high level of seismicity, with a value of 6.17 and a b-value of 0.757. Areas with relatively high earthquake activity potential were identified in Blitar, Tulungagung, and Trenggalek Regencies. The average seismicity index of East Java is 6.002, with a relatively short earthquake recurrence interval. These findings indicate a high potential for earthquake occurrence in East Java and may serve as a preliminary basis for sustainable earthquake disaster mitigation planning.
Co-Authors Affrilianto, Riko Al Ghifari, Muhammad Taufiq Akbar Andi Andi Bambang Sunardi, Bambang Dea Mutiara Jannah Erni Asanti Hana Rosyida Hasanah, Fadila Uswatun Ika Maulita Khaerunnisa, Icha Khoirunisa, Wafiq Mentari, Nur faqhina mentari Mery S. A., Indar Mukhtar Effendi Nugroho Budi Wibowo Nuraini, Risna Wahyu Pulo Boli, Lusia Silfia Saefurohmah, Mufti Safitri, Maylialfinatun SALSABIILA ANINDYA NOOR CANDRANINGTYAS Sugito - Suwondo, Wawan Joko Thaqibul Fikri Niyartama Umi Pratiwi, Umi Utami, Rizky Widya Wuri Handayani