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All Journal Journal of Engineering and Technological Sciences Jurnal Geosaintek JOURNAL ONLINE OF PHYSICS Al-Kimia Journal of Appropriate Technology for Community Services
Yekti Widyaningrum
Jurusan Fisika, Universitas Bangka Belitung
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics

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Journal : Jurnal Geosaintek

 1 
Aplikasi Filter EEMD Untuk Meningkatkan Kualitas Data VLF-EM Studi Kasus: Estimasi Lokasi Gorong-Gorong Di Kampus ITS Surabaya Yekti Widyaningrum; A.M Miftahul Huda; Sungkono Sungkono
Jurnal Geosaintek Vol 4, No 3 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (593.609 KB) | DOI: 10.12962/j25023659.v4i3.4493

Abstract

Eksplorasi bawah permukaan menggunakan Very Low Frequency Electromagnetics (VLF-EM) telah dilakukan untuk menentukan rongga bawah tanah (gorong-gorong). Untuk mempertajam hasil eksplorasi dan mereduksi gangguan diaplikasikan filter EEMD. Data hasil filter diinterpretasikan secara kualitatif menggunakan filter Karous-Hjelt. Hasil Interpretasi filter Karous-Hjelt menunjukkan bahwa anomali bawah permukaan terdapat pada 25-35 meter dari titik mengukuran awal dan kedalaman 3-6 meter. Anomali tersebut menyatakan lokasi gorong-gorong di lokasi pengukuran
SUSEPTIBILITAS MAGNETIK SISTEM PANASBUMI NON VULKANIK DESA TERAK MENGGUNAKAN METODE GEOMAGNETIK Tri Kusmita; Yuant Tiandho; Yekti Widyaningrum; Umi Alawiyah
Jurnal Geosaintek Vol 9, No 3 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v9i3.15563

Abstract

Geothermal in Bangka Belitung islands are classified as radiogenic type of non-volcanic geothermal. Geothermal in this area was formed due to granite rocks that have been fractured, folded or faulted. Geothemal Terak has a surface temperature of 550C - 61.80C with a water discharge of 0.2 liters/second. This research aims to identify the forming rocks of geothermal system at Terak village based on magnetic field anomalies. Data acquisition was measured using a Proton Precession Magnetometer (PPM) along 2.5 km with 100 m spacing and 500 m spacing between lines. Data processing was analyzed using diurnal correction, IGRF correction, RTE (Reduce to the Equator) correction, anomaly separation using Upward Continuation. Modeling performed by applying 2D Inverse Modeling. The results indicated that the reservoir rock in Terak area with non-volcanic geothermal system was granite with susceptibility 42 x 103 - 49 x 103. The depth of the reservoir rock was partially at a depth of 30 - 125 meters above sea level and some were exposed on the surface (0 - 80 meters above sea level). Reservoir rocks are scattered in the northwest area of the study.
Co-Authors A.M Miftahul Huda Ali Djamhuri Alwi Husein Anisa Indriawati Fandi A. Fathoni Fitri Afriani Herman Aldila Jumnahdi, Muhammad Masithoh N. Wasilah Sungkono, B.J. Santosa Tri Kusmita Umi Alawiyah Widodo Budi Kurniawan Wildan M. Hidayatullah Yuant Tiandho