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All Journal International Journal of Advances in Applied Sciences Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan BERKALA FISIKA IJOG : Indonesian Journal on Geoscience Techno: Jurnal Penelitian Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Jurnal Meteorologi Klimatologi dan Geofisika Journal of Physics and Its Applications Jurnal Teori dan Aplikasi Fisika Journal of Engineering and Scientific Research (JESR) Jurnal Geosaintek Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Wiji Raharjo
Universitas Pembangunan Nasional Veteran Yogyakarta
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Social Sciences

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STUDI PROBABILITAS GEMPA DAN PERBANDINGAN ATENUASI PERCEPATAN TANAH METODE JOYNER DAN BOORE (1988), CROUSE (1991) DAN SADIGH (1997) DI SEKITAR WILAYAH BANDA ACEH DAN BENGKULU Palupi, Indriati Retno; Raharjo, Wiji; Santoso, Agus
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.059 KB)

Abstract

Sumatera is one island in Indonesia which is located near subduction zone. It is prone of earthquake, but the level of prone is not same in each province on its, like in Banda Aceh and Bengkulu. Both of them are the site of this research. Probability is one way to know characteristic or earthquake distribution on both of the site. Earthquake distribution in  Aceh is more convergence than Bengkulu. It means that earthquake’s number in Aceh is more than in Bengkulu. It is done for fault source and area source of earthquake. Ground motion because of earthquake can display by acceleration and attenuation curve. It can be calculated by Joyner & Boore (1988), Crouse (1991) and Sadigh (1997) method. Keywords: PSHA, acceleration, Joyner & Boore (19988), Crouse (1991) and Sadigh (1997) method
ANALISI HUBUNGAN MAGNITUDO GEMPA BUMI TERHADAP HASIL FREKUENSI DOMINAN PADA RANGKAIAN GEMPA ACEH 2004, YOGYAKARTA 2006, PALU DAN LOMBOK 2018 SEBAGAI UPAYA MITIGASI BENCANA Nela Elisa Dwiyanti; Vira Irnanda, Elleona Septi N; Indriati Retno Palupi; Wiji Raharjo; Wrego Seno Giamboro; Afriliani M Handini; Ananda Achlaqul Karimah; Ririn Setyowati; Edoarddo Tobing
Jurnal Meteorologi Klimatologi dan Geofisika Vol 7 No 3 (2020): Jurnal Meteorologi Klimatologi dan Geofisika
Publisher : Unit Penelitian dan Pengabdian Masyarakat Sekolah Tinggi Meteorologi Klimatologi dan Geofisika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36754/jmkg.v7i3.203

Abstract

Indonesia is located at the boundaries of three major plate of the world, namely Indo-Australia, Eurasia, and the Pacific Plates. This has made Indonesia prone to earthquakes, so mitigation are needed. The purpose of this research is to determine the empirical relationship between earthquake magnitude and dominant frequency results based on several major earthquake events in Indonesia such as in Aceh 2004, Yogyakarta 2006, Lombok and Palu 2018 as an effort to earthquake hazard mitigation in Indonesia. Magnitude carries information about earthquake power based on the energy released from the hypocenter. Physically, magnitude is related to frequency. The frequency can obtained from earthquake records in time domain which are converted to frequency domain by Fast Fourier Transform method. Earthquake data is obtained from IRIS and uses 89 events with magnitude of 4-9. In Aceh, Yogyakarta, Lombok, and Palu that relatioship between magnitude and frequency are y = -0.053x + 6.2999, y = 0.018x + 4.082, y = -0.0496x + 6.455, and y = -0.0192x + 5.3129. In this research, it can be concluded that the bigger magnitude of the earthquake has smaller frequency. The potential magnitude that appear if the seismicity are low in Aceh, Yogyakarta, Lombok, and Palu are 6.2, 4, 6.4, and 5.3.
Analisis Guncangan Gempa Bumi Lombok dan Palu Tahun 2018 Indriati Retno Palupi; Wiji Raharjo; Oktavia Dewi Alfiani
Jurnal Lingkungan dan Bencana Geologi Vol 11, No 2 (2020)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v11i2.283

Abstract

Gempa bumi Lombok dan Palu di Sulawesi Tengah pada tahun 2018 mengakibatkan banyaknya kerusakan pada bangunan yang ada di wilayah sekitar gempa bumi. Kedua gempa tersebut sama-sama bersumber dari patahan tetapi memiliki karaekteristik yang berbeda. Gempa bumi di Lombok didahului oleh foreshock dengan jarak tujuh hari dari mainshock sementara gempa bumi Palu mengakibatkan timbulnya fenomena tsunami dan likuefaksi. Salah satu efek yang ditimbulkan akibat gempa bumi dan dirasakan langsung oleh masyarakat adalah guncangan tanah. Guncangan tersebut dapat dirasakan sampai dengan ratusan kilometer dari pusat lokasi gempa bumi dengan berbagai variasi kekuatan yang berbeda-beda, tergantung pada mekanisme fokus, besaran magnitudo gempa bumi itu sendiri dan jarak lokasi dari sumber gempa bumi serta faktor geologi. Atenuasi percepatan tanah merupakan salah satu metode untuk memperkirakan seberapa besar kekuatan guncangan tanah akibat gempa bumi. Dalam penelitian ini digunakan persamaan menurut Campbell (1981), Idriss (2002) dan Fukushima. Hasil perhitungan menunjukkan bahwa daerah di bagian sisi barat dan timur Pulau Lombok serta hampir semua daerah di Sulawesi Tengah memiliki percepatan tanah yang cukup besar akibat gempa bumi.Kata kunci: atenuasi percepatan tanah, jarak, gempa Lombok, gempa Palu, magnitudo, mekanisme fokus Lombok and Palu earthquake (Central Sulawesi) in 2018 caused such damage to buildings in area around earthquake location. Both of them came from fault but they had their own chacacteristic. Lombok earthquake started with foreshock seven days before mainshock, while Palu earthquake its cause tsunami and liquifaction phenomena. One effect caused by earthquake and felt by peoples is ground shaking. Ground shaking can be felt by people untill hundred kilometers from earthquake location, depended on its focal mechanism, magnitude, the distance of the location and geological factors. Attenuation of Ground Acceleration is one methode to calculate the energy of ground shaking. In this research, we use ground acceleration equation from Campbell (1981), Idriss (2002) and Fukushima. The result showed that in west and east part of Lombok island and most of the area of Central Sulawesi have high ground shaking caused by the earthquake. Keywords: ground acceleration, distance, Lombok earthquake, Palu earthquake, magnitude, focal mechanism
Studi Automatic Picking Waktu Tiba Gelombang P dan S dengan Menggunakan Spektogram pada Obspy Python Indriati Retno Palupi; Wiji Raharjo
Jurnal Teori dan Aplikasi Fisika Vol 8, No 1 (2020): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v8i1.2433

Abstract

One of important thing in locating hypocenter process is determine P and S arrival time of the seismogram. Beside that, frequency analysis by FFT method is needed to know the character of the seismogram, like dominant frequency. For further analysis, FFT method can be a good tools in determine P and S wave arrival time in the spectogram form. This process is called automatic picking. 
Tsunami Modelling Araound Lombok, Indonesia Indriati Retno Palupi, Wiji Raharjo
Journal of Engineering and Scientific Research Vol. 2 No. 2 (2020)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1212.922 KB) | DOI: 10.23960/jesr.v2i2.58

Abstract

Lombok earthquake in 2018, raised many failure of facilities that impact to human life. The earthquake was unique, started with mainshock that did not predict by scientist with hypocenter located in Flores Fault in the north of Lombok Island. In 1992, tsunami recorded in Lombok with the hypocenter also in Flores Fault. Based on the information, earthquake in Flores Fault can trigger tsunami. Beside Flores Fault, subduction zone in the south of Lombok is also can be earthquake source and it is not impossible can trigger the tsunami. The purpose of this research is to modeled the tsunami both it come from earthquake in Flores Fault and the subduction zone with magnitude 7.8. Numerical method is used to modelled it and the result is the height and velocity of tsunami is 11 m and 720 km/hours for Flores Fault and 9 m and 450 km/hour for subduction Zone.
Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java Joko Soesilo; Indriati Retno Palupi; Wiji Raharjo; Sutanto Sutanto; Faris Ahad Sulistyohariyanto; Kevin Gardo Bangkit Ekaristi; Fandi Budi Stiawan
EKSPLORIUM Vol 39, No 2 (2018): November 2018
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (552.064 KB) | DOI: 10.17146/eksplorium.2018.39.2.4954

Abstract

ABSTRACTGranitoid outcrop has been observed in Montongan, Tulakan Subdistrict, Pacitan District, East Java. Geochemically, granitoid shows peralluminous S-type granitoid which consists of comparable plagioclase and potassium feldspar leading to adamelite and granodiorite variety with andalusite, fine size corundum and cordierite inside. These modal minerals are consistent with its bulk chemical analysis result that shows alumina rich rock. Highly weathered spotted pinkish soil with remaining quartz gravels characterizes its surface. Lateritic pink soil up to more than 25 meters thick covers the granitoid body and this feature is indicative to locate its surface distribution, while its subsurface distribution is remain uncertain. The research aimed to identify granitoid subsurface distribution. To identify the subsurface body, gravity and seismic tomography models were used. According gravity model, the pluton body is 5 km wide which is rootless downward and seems extends eastward. Meanwhile, the north-south seismic tomographic model across Pacitan Region indicates dense solid body override the recent Java subduction zone. The body is assumed to have correlation with surface granitic rock. It supports an idea that there is a micro continent trapped beneath Southern Mountain of East Java. ABSTRAKSingkapan granitoid telah teramati di daerah Montongan, Kecamatan Tulakan, Kabupaten Pacitan, Jawa Timur. Secara geokimia, granitoid Pacitan memperlihatkan granitoid peralumina tipe-S yang tersusun berdasarkan perbandingan plagioklas dan kalium felspar menunjuk pada varian adamelit dan granodiorit dengan andalusit, korundum halus dan kordierit di dalamnya. Mineral modal tersebut konsisten dengan hasil analisis kimia total yang menunjukkan batuan kaya alumina. Tanah berwarna merah muda yang sangat lapuk dengan kerikil sisa kuarsa menjadi ciri khas di permukaannya. Tanah laterit merah muda yang tebalnya lebih dari 25 meter menutupi tubuh granitoid tersebut dan menjadi petunjuk penyebaranya di permukaan, namun penyebaran di bawah permukaannya masih belum pasti. Penelitian ini bertujuan untuk mengetahui penyebaran granitoid di bawah permukaan. Untuk mengidentifikasi tubuh bawah permukaannya, digunakan pemodelan gravitasi dan tomografi seismik. Menurut model gravitasi tubuh pluton mempunyai lebar 5 km dan tampak memanjang ke arah timur yang tidak menentu ke bawahnya. Sementara itu, model tomografi seismik utara-selatan yang memotong wilayah Pacitan, menunjukkan suatu tubuh padat keras berada di atas zona subduksi Jawa saat ini. Tubuh tersebut diasumsikan memiliki hubungan dengan batuan granitik di permukaan. Hal tersebut mendukung ide bahwa terdapat mikro-kontinen terperangkap di bawah Pegunungan Selatan Jawa Timur.
Pemodelan Tsunami Sederhana dengan Menggunakan Persamaan Differensial Parsial Indriati Retno Palupi; Wiji Raharjo; Eko Wibowo; Hafiz Hamdalah
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 8, No 1 (2018) : IJAP Volume 8 ISSUE 01 YEAR 2018
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v8i1.16284

Abstract

One way to solve fluid dynamics problem is using partial differential equation. By using Taylor expansion, fluid dynamics can be applied simply. For the example is tsunami wave. It is include to hyperbolic partial differential equation, tsunami wave propagation can describe in space and time function by using Euler FTCS (Forward Time Central Space) formula.
Socialization of Soil Vulnerability Map using Microseismic Method in Eastern Sleman, Yogyakarta Wiji Raharjo; Ajimas Pascaning Setiohadiwibowo; Indriati Retno Palupi; Verty Deffian Supriyono; Arif Nor Aminah
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol 3, No 1 (2019): Vol 3, No 1 (2019)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (510.472 KB)

Abstract

Community service activities are carried out in Depok District, Sleman Regency, Yogyakarta with preliminary survey stages, field data acquisition, data processing, data interpretation and socialization. The processing of the microseismic method is various, one of this method is the Horizontal to Vertical Spectral Ratio (HVSR) method. Processing of this HVSR method is to determine the natural frequency value and amplification value obtained at the time of acquisition so that it can be used to calculate the value of soil vulnerability. Based on the results of data processing, Depok District has a soft soil type where the soil is susceptible to vibration.Socialization is carried out in order to get more attention in infrastructure development or in accordance with the standards by the government. This is done to avoid the occurrence of severe building damage when hit by an earthquake.Keywords: Disaster-Prone Regional Socialization, Earthquakes, Microseismic, Soil vulnerability maps  
Ambient Noise Tomography Around The Banda Arc Study Case: Before Earthquake of February 2nd, 2022 Raharjo, Wiji; Palupi, Indriati Retno; Madona, Madona
Indonesian Journal on Geoscience Vol. 12 No. 1 (2025)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.12.1.55-63

Abstract

Banda Arc is one of the vulnerable areas in Indonesia. It is trapped by the slab coming from AustralianEurasian Plate with the S ̶ N direction and the slab coming from Pacific Plate with the E ̶ W direction. Because of its location, it has a high seismicity, for example there was an earthquake that raised a big tsunami in 1852. On February 2nd, 2022, the newest earthquake with magnitude of 6.2 hit the Banda Arc. In many cases, earthquakes are damaging disasters, because their surface waves are shocking through anything they pass. Nowadays the surface wave is used to get the subsurface description and the variation of its velocity, and ambient noise tomography (ANT) is one way to solve it. By using some analyses like cross correlation and fast fourier transform (FFT) from the earthquake waveform three days before February 2nd, 2022, the depth and velocity group around the Banda Arc can be known. There is an indication that it was influenced by the ocean wave, which became wider and close to the main shock. Besides that, ANT result shows that the low velocity anomaly was distributed around the deepest area of the Banda Arc, because the energy absorbed more there, besides in the near location of hypocenter and resulting low velocity anomaly. It is shown that the low velocity anomaly can show how the geological condition is.
PREDICTIVE DECONVOLUTION BASED ON SEISMIC WAVEFORM DIAGNOSTICS FOR ENHANCED MARINE IMAGING RESOLUTION Fahmi, Muhammad; Syamputra, Dhani Nur Indra; Raharjo, Wiji; Sari, Tri Wulan; Nafian, Muhammad
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.8, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v8i1.48064

Abstract

Short-period multiples are a persistent problem in marine seismic processing, particularly in shallow-water environments where near-surface reverberations interfere with primary reflections and decrease temporal resolution. Predictive deconvolution remains a widely used method for attenuating such coherent noise. However, conventional implementations often apply fixed operator parameters, limiting their adaptability to waveform variations across time and offset. This study introduces a predictive deconvolution framework guided by seismic waveform diagnostics, in which operator parameters specifically prediction lag and filter length are selected based on trace characteristics such as waveform periodicity and spectral energy distribution. The approach is designed to improve multiple suppression while preserving the fidelity of primary reflections on a 2D marine pre-stack seismic dataset acquired in a shallow offshore setting characterized by strong short-period multiples and limited bandwidth. The results demonstrate around 25% increase in frequency bandwidth, improved reflector continuity, and reduced coherent noise in pre-stack gathers. Compared to conventional deconvolution, the waveform informed design achieves a more effective balance between attenuation and resolution. The proposed approach is applicable to modern marine datasets where high-resolution imaging is limited by near-surface interference.
Co-Authors Achmad, Rahim Afriliani M Handini Agus Santoso Ajimas Pascaning Setiohadiwibowo Alfiani, Oktavia Dewi Ananda Achlaqul Karimah Anggarajati, Bentang Anifah, Eka Masrifatus Arif Nor Aminah Aswan, Marwis Ayu Utami, Ayu Edoarddo Tobing Ekaristi, Kevin Gardo Bangkit Eko Wibowo Fahri, Ricky Al Fandi Budi Stiawan Faris Ahad Sulistyohariyanto Giamboro, Wrego Seno Indriati Retno Palupi, Indriati Retno Isnaini, RR Desi Kumala Jayawarsa, A.A. Ketut Joko Soesilo Kevin Gardo Bangkit Ekaristi Kristanto, Wisnu Aji Dwi Madona, Madona MUHAMMAD FAHMI Nafian, Muhammad Nela Elisa Dwiyanti Oktavia Dewi Alfiani Rahayu, Mey Yani Puji Rohima Wahyu Ningrum, Rohima Wahyu Sahetapi, Calvin Alex Soesilo, Joko Stiawan, Fandi Budi Sulistyohariyanto, Faris Ahad Sutanto Sutanto Sutanto Sutanto Syamputra, Dhani Nur Indra Tri Wulan Sari, Tri Wulan Verty Deffian Supriyono Vira Irnanda, Elleona Septi N Yatini, Y