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All Journal Wahana Fisika : Jurnal Fisika dan Terapannya Jurnal Neutrino IJOG : Indonesian Journal on Geoscience Physics Student Journal
Hetty Triastuty
Center of Volcanology and Geological Hazard Mitigation Bandung
Earth & Planetary Sciences Physics

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Journal : Jurnal Neutrino

 1 
ANALISIS NON LINIER TREMOR VULKANIK GUNUNGAPI RAUNG JAWA TIMUR–INDONESIA Wildani, Arin; Maryanto, Sukir; Gunawan, Hendra; Triastuty, Hetty; Hendrasto, Muhammad
Jurnal Neutrino JURNAL NEUTRINO (Vol 6, No 1
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (949.419 KB) | DOI: 10.18860/neu.v0i0.2442

Abstract

Penelitian mengenai aktifitas tremor vulkanik gunung Raung yang terekam pada bulan Oktober 2012 telah dilakukan. Data yang digunakan pada penelitian ini yaitu data tremor vulkanik yang terekam pada tanggal 17 Oktober sampai 16 November 2012. Penelitian dimulai dengan seleksi event tremor vulkanik yang jelas. Selanjutnya dilakukan rekonstruksi diagram attraktor dari tremor vulkanik gunung Raung dengan menggunakan teorema delay embedding. Delay time untuk merekonstruksi diagram attraktor ditentukan dengan menggunakan Metode Mutual Information (MI) dan didapatkan delay time tremor vulkanik gunung Raung dalam range   0,08 s - 0,09s. Dimensi embedding ditentukan dengan menggunakan metode False Nearest Neighbour (FNN) dan didapatkan dimensi embedding tremor vulkanik gunung Raung dalam range 4-5. Dengan menggunakan delay time dan dimensi embedding yang didapatkan maka diagram attraktor dapat direkonstruksi. Dimensi fraktal dihitung dengan menggunakan metode dimensi korelasi dan didapatkan nilai dimensi fraktal tremor vulkanik gunung Raung berkisar 2,91  – 3,35. Nilai Lyapunov exponent tremor vulkanik gunung  Raung  didapatkan  berkisar  0,016  –  0,030.  Berdasarkan  dimensi  fraktal  dan  Lyapunov exponent tremor vulkanik gunungapi Raung bersifat kaotik.
HYPOCENTER DETERMINATION AND CLUSTERING OF VOLCANO-TECTONIC EARTHQUAKES IN GEDE VOLCANO 2015 Nugraha, Aulia Kharisma; Maryanto, Sukir; Triastuty, Hetty
Jurnal Neutrino Vol 9, No 2 (2017): April
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1034.124 KB) | DOI: 10.18860/neu.v9i2.4103

Abstract

Gede volcano is an active volcano in West Java, Indonesia.  Research about determination the volcano-tectonic earthquake source positions has given results using volcano-tectonic earthquakes data from January until November 2015. Volcano-tectonic earthquakes contained deep (VT-A) have frequency (maximum amplitude) range 5 – 15 Hz. Furthermore, they contain shallow earthquake, VT-B have range 3-5 Hz and LF have range 1-3 Hz. Geiger’s Adaptive Damping (GAD) methods used for determining the hypocenter of these volcano-tectonic (VT) events. Hypocenter distribution divided into 4 clusters. Cluster I located in the crater of Gede volcano dominated by VT-B earthquakes their depth range 2 km below MSL to 2 km above MSL including the VT-B swarm. The seismic sources in cluster I indicated dominant due to the volcanic fluid or gas filled in conduit pipes. Cluster II located at the west of Gede volcano caused by Gede-Pangrango fault-line dominated by VT-A earthquakes with depths range 1.5 km below MSL to 700 m above MSL. Cluster III located in the North of Gede volcano dominated by VT-A events there caused by graben fault area with those depths range 7.5 – 1.65 km below MSL. Cluster IV located in South West of Gede volcano contained VT-A earthquakes with depth range at 10 km below MSL and VT-B earthquakes this depth 2 km below MSL. Due to magma intrusion filled into fractures of the fault in the West of Gede volcano this shallow magma filling-fractures and degassing in subsurface assumed dominates the volcano-tectonic events from January to November 2015 due to faults extends from North to South occured in the West of Gede volcano.
HYPOCENTER DISTRIBUTION OF LOW FREQUENCY EVENT AT PAPANDAYAN VOLCANO Hasan, Muhammad Mifta; Triastuty, Hetty; Santosa, Bagus Jaya; Widodo, Amien
Jurnal Neutrino Vol 9, No 1 (2016): October
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (627.219 KB) | DOI: 10.18860/neu.v9i1.3655

Abstract

Papandayan volcano is a stratovolcano with irregular cone-shaped has eight craters around the peak. The most active crater in Papandayan is a Mas crater. Distribution of relocated event calculated using Geiger Adaptive Damping Algorithm (GAD) shows that the epicenter of the event centered below Mas crater with maximum rms 0.114. While depth of the hypocenter range between 0-2 km and 5-6 km due to activity of steam and gas.
Co-Authors Adi Susilo Amien Widodo Arin Wildani Hendra Gunawan indria restika anggraeni Irwan Setyowidodo, Bagus Jaya Santosa Kirbani Sri Brotopuspito Mimin Iryanti Muhammad Hendrasto Muhammad Mifta Hasan Municha, Dea Hertiara Nanang Dwi Ardi Nugraha, Aulia Kharisma Sukir Maryanto Sulistiawan, Ria Vanisa Syahra, Vanisa Vico Luthfi Ipmawan Welayaturromadhona Welayaturromadhona