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All Journal BERKALA FISIKA Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir UNEJ e-Proceeding 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 Jurnal Teori dan Aplikasi Fisika
Indriati Retno Palupi, Indriati Retno
Program Studi Teknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” Yogyakarta Jln. SWK 104 Condong Catur Sleman Yogyakarta
Astronomy Earth & Planetary Sciences Education Energy Environmental Science 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
RELOKASI HIPOSENTER DAERAH SEKITAR PACITAN DENGAN MENGGUNAKAN METODE SIMULATED ANNEALING Indriati Retno Palupi
Jurnal Lingkungan dan Bencana Geologi Vol 9, No 3 (2018)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (641.366 KB) | DOI: 10.34126/jlbg.v9i3.191

Abstract

Zona subduksi merupakan salah satu sumber gempa yang ada di Pulau Jawa. Berdasarkan pola penyebaran gunungapi, diketahui zona subduksi di Pulau Jawa semakin curam dari barat ke timur, terutama di Kabupaten Pacitan. Adanya perbedaan sudut zona subduksi ditengarai dapat menjadi penyebab munculnya gempa besar di sekitar Pacitan sehingga diperlukan gambaran pola sebaran sumber gempa bumi (hiposenter). Relokasi hiposenter menjadi penting untuk menempatkan hiposenter mendekati dengan arah pola zona subduksi. Dengan metode simulated annealing, hiposenter terpetakan lebih mendekati dengan pola zona subduksi.
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. 
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.
Relocation of hypocenter using Jacobian’s matrix and Jeffreys-Bullen’s velocity model Faid Muhlis; Risca Listyaningrum; Indriati Retno Palupi
UNEJ e-Proceeding 2016: Proceeding The 1st International Basic Science Conference
Publisher : UPT Penerbitan Universitas Jember

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Abstract

Hypocenter is the center of earthquake that the position can be explained in x coordinate, y coordinate and z (depth). The location of the hypocenter is obtained by calculating the arrival time of wave propagation to station (at least three seismic stations) which is multiplied by the velocity model of the earth. To determination the position of hypocenter is used earth velocity model assuming a homogeneous of the earth. In reality the Earth containing in layers and the increasing of depth will make the material more compact, so it make the value of velocity wave propagates in each medium increase. It is necessary to recalculate the position of the hypocenter, so new position of hypocenter is accordance with the geological conditions. In this paper will use the study site on Java Island area with the amount of data are 19.685 events of tectonic earthquake. The processing using Matlab software with Jacobian’s matrix calculation and using reference of Jeffreys-Bullen’s velocity model. The results show that the relocation of the hypocenter position shifted relative to the southeast, while the depth become shallower.
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

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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  
Co-Authors Afriliani M Handini Agus Santoso Ajimas Pascaning Setiohadiwibowo Ananda Achlaqul Karimah Arif Nor Aminah Edoarddo Tobing Eko Wibowo Faid Muhlis Fandi Budi Stiawan Faris Ahad Sulistyohariyanto Giamboro, Wrego Seno Joko Soesilo Kevin Gardo Bangkit Ekaristi Nela Elisa Dwiyanti Oktavia Dewi Alfiani Ririn Setyowati Risca Listyaningrum Sutanto Sutanto Verty Deffian Supriyono Vira Irnanda, Elleona Septi N Wiji Raharjo