Claim Missing Document
Check
Articles

ZONASI SITE EFFECT DAN ANALISIS BAHAYA PENGUATAN GEMPA MENGGUNAKAN METODE DSHA UNTUK MENENTUKAN PGA DI KABUPATEN SUMBA BARAT DAYA Soulthan Salahudin Al Ayubi; Karyanto Karyanto; Nandi Haerudin; Syamsurijal Rasimeng; Rahmat C Wibowo
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1549.687 KB) | DOI: 10.29303/ipr.v3i2.44

Abstract

Southwest Sumba Regency is located in the Banda Arc area. Its position which is very close to the subduction area in the south of Indonesia caused a lot of tectonic activity and earthquake hazard. The arrangement of alluvium, coral, and thick deposits on the island of Sumba makes it prone to earthquake strengthening. Zoning of soil characters using site effects and DSHA method was carried out to determine the danger level of strengthening the Southwest Sumba Regency. Zoning of the site effect soil character uses microtremor data which is correlated with seismic hazard analysis to obtain the PGA values on bedrock and ground surface using the closest earthquake source. The area is dominated by Class 2 and 3 lands (f0 worth 1.333 - 5 Hz) according to the Kanai Classification (1983), with an amplification predominance of 3.8-8.3 times. This indicates that the research area is dominated by thick sediment deposits. The PGA value obtained from the DSHA method is known that Southwest Sumba Regency has a PGA soil of 0.075-0.19 g and a bedrock PGA of 0.067-0.085 g using earthquake record data in Sumba Subduction and Timor Subduction. With PGA estimation, it is known that the level of earthquake disaster vulnerability is high, located in the south of Southwest Sumba Regency which is suspected to be composed of thick sediments and close to the Sumba Subduction and Timor Subduction.Keywords: Site effect, predominant frequency, amplification, earthquake, DSHA, PGA
OPTIMALISASI PENCITRAAN STRUKTUR BAWAH PERMUKAAN MENGGUNAKAN METODE KIRCHHOFF PRE-STACK TIME MIGRATION PADA DATA SEISMIK LAUT WETAR Syamsurijal Rasimeng; Amelia Isti Ekarena; Bagus Sapto Mulyanto; Subarsyah Subarsyah; Andrian Wilyan Djaja
JGE (Jurnal Geofisika Eksplorasi) Vol 6, No 2 (2020)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v6i2.67

Abstract

Migration is one of the stages in seismic data processing aimed at returning the diffraction effect to the actual reflector point. The processing of a seismic data is adjusted to the existing problems in the data itself, so the accuracy in using the migration technique and determination of data processing parameters greatly affects the resulting seismic cross-section. Kirchhoff Pre-Stack Time Migration is one of the most used migration methods in seismic data processing because it shows better results than conventional stacking methods. The parameters that need to be noticed in the Kirchhoff migration are the migration aperture values. Based on this, variations of migration aperture values used are 75 m, 200 m and 512.5 m. The 512.5-m aperture migration value shows the best seismic cross-section results. This is evidenced by the capability in eliminating bowtie effects around CDP 600 up to CDP 800, eliminating diffraction effects around CDP 3900 to CDP 4050, and showing a seismic cross-section with better lateral resolution compared to the migration value of the aperture of 75 m and 200 m. Based on the seismic cross-section of migration results, the geological structure that can be identified is a fault that found in some CDP.
INVERSI 2D DATA MAGNETOTELURIK UNTUK MENGETAHUI KEBERADAAN HIDROKARBON DAERAH BULA, MALUKU Elen Novia Limswipin; Syamsurijal Rasimeng; Karyanto Karyanto; Noor Muhammad Indragiri
Jurnal Geofisika Eksplorasi Vol 4, No 3 (2018)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v4i3.38

Abstract

There had been done a regional research which tittle is “2D inversion magnetotelluric data for understanding the hidrocarbon presence in Bula, Maluku”. This study aims to determine the resistivity distribution area of research based on data Magnetotelluric, identifying the presence of hydrocarbons based on the value of the resistivity of the results of 2D inversion of data Magnetotelluric. Methods of data processing done are (i) transform raw data from the time domain into the frequency domain, (ii) reduce noise by robust processing, (iii) process combine, (iv) Selection cross power, (v) inversion 1D and 2D. 2D inversion results is sectional subsurface resistivity distribution, layer having resistivity values 7-16 Ωm along MT1 and MT7 point at a depth of 1000 meters is a clay stone which is indicated as cap rock. Layer with resistivity values 34-120 Ωm, which is between the point MT6 and MT7 at a depth of 1500 meters is indicated as the sandstone reservoir. Based on geologic information and sectional 2D inversion seen their fault based on the resistivity contrast is between the point MT2 and MT3, MT3 and MT4 and MT6 and MT7.
PENGHILANGAN SWELL NOISE DAN LINIER NOISE PADA DATA SEISMIK 2D MARINE HIGH RESOLUTION PADA LINTASAN “AF” MENGGUNAKAN METODE SWNA, F-K FILTER DAN TAU-P TRANSFORM Achmad Subari; Syamsurijal Rasimeng; Nando Liven Konstanta
Jurnal Geofisika Eksplorasi Vol 4, No 1 (2018)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v4i1.3

Abstract

Research have been done about noise removal caused by environment (swell noise) and linear noise on high frequency 2D seismic data on line “AF” using swell noise attenuation (SWNA) method, f-k filter and tau-p transformation. Based on obtained result, swell noise succeed removed from data using velocity limited filter that is 1000 m/s on frequency 25 Hz applied to swell noise attenuation process. Applied SWNA data, then created input f-k filter process. In f-k filter process, used polygon design having a minimum frequency limit around 5 Hz maximum high frequency around 450 Hz. The results f-k filter giving a good output with linear noise removal to time 1500 ms. F-k filter output obtained, then processed again using tau-p transformation method. Application of tau-p transformation transformed data into (τ-p) domain. Transformed data on (τ-p) domain, linear noise made on moveout 600 ms. Then the data muted using surgical mute. Based on obtained result, tau-p result can removing linear noise on data. Linear noise removed dominating on time 1500 ms-2500 ms. That matter caused by linear noise on time 0-1500 ms succeed removed using previous process. After the method succesfully applied , data processing continued doing the stack and migration process. Applied migration is postack kirchoff time migration, migration do with migration angel around 300 and aperture around 600 m.
ANALISIS DEFORMASI PERMUKAAN MENGGUNAKAN METODE DInSAR (Differential Interferometry Synthetic Aperture Radar) PADA STUDI KASUS GEMPABUMI LOMBOK PERIODE AGUSTUS 2018 Muhammad Fikri Azhari; Karyanto Karyanto; Syamsurijal Rasimeng; Bagus Sapto Mulyanto
Jurnal Geofisika Eksplorasi Vol 6, No 2 (2020)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v6i2.68

Abstract

Lombok is located on the boundary of active tectonic plates, this is what caused the Lombok Earthquake on August, 2018. DInSAR is a remote sensing technology that utilizes radar satellites to measure the amount of deformation on the surface of the ground with sub-centimeter accuracy. This study aims to obtain the value of surface deformation after the earthquake that struck the Lombok region, in August 5, 2018 Earthquake and the August 19 2018 Earthquake and analyze impact and charateristics of the deformation that occurred in the two earthquakes. The research was carried out based on SAR Sentinel-1 image processing using SNAP Software, Google Earth and ArcGIS 10.3. Deformation that occurred after the Lombok earthquake on August 5, 2018 caused an increase in land level (uplift) on the coast of North Lombok with a deformation value of 15-30 cm to the Line of Sight (LOS). Whereas deformation in the form of subsidence occurs in the City of Mataram and West Lombok with a value of -6 to -16 cm to the Line of Sight (LOS). While the deformation that occurred after the Lombok earthquake on August 19, 2018, caused an increase in land level (uplift) on the East Lombok coast with a deformation value of 18 to 31 cm to the Line of Sight (LOS). Whereas deformation in the form of subsidence occurs in Central Lombok with a value of -3 to -17 cm to the Line of Sight (LOS).
IDENTIFIKASI CEKUNGAN HIDROKARBON “RAE” BERDASARKAN DATA MAGNETOTELURIK DI DAERAH BULA, MALUKU Gita Purna Rae Wanudya; Syamsurijal Rasimeng; Rustadi Rustadi; Noor Muhammad Indragiri
Jurnal Geofisika Eksplorasi Vol 4, No 3 (2018)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v4i3.40

Abstract

The research had been performed using Magnetotelluric to get a 2D model based on variations in resistivity of the subsurface rock. The purpose of this study was to determine the hydrocarbon formation zone. The research method to achieve the research objectives, among others, the first filtering performed on the data with a robust process. This process consists of Robust No Weight, Robust Rho Variance and Ordinary Cohenerency. The second step is done to change the format Selection XPR And Edi. A third inversion resistivity model for the review get a 2D cross section. Based on the findings of the eight data processing methods of measurement points obtained information Magnetotelluric rock formations. Formation hidrokrabon What are the areas is research a reservoir and caprock. The layer in 1600 m – 2700 m depth from the surface which resisvity 12 -33 m assumpted as clay cap. While the layer in 2700 m – 5000 m depth from the surface with high resistivity 41- 250 m is assumpted as oil sands (reservoir). The trap zone of this hidrocarbon formation categorized into structural trap which is the trap of anticline.
ANALISIS ZONA BAHAYA GEMPABUMI BERDASARKAN METODE DETERMINISTIK DAN PENDEKATAN GEOMORFOLOGI KOTA PADANG SUMATERA BARAT Azis Riyanti; Syamsurijal Rasimeng
Jurnal Geofisika Eksplorasi Vol 5, No 2 (2019)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v5i2.26

Abstract

Research on earthquake hazard analysis based on deterministic methods and the geomorphology approach of Padang City has been carried out to determine the maximum soil acceleration (PGA) and amplification of the source of the Suliti faults and Earthquake Subduction and determine soil classes based on shear waves (Vs30). The PGA value, several attenuation equations are used to find the magnitude of the shock produced when a shallow earthquake occurs. For the source of fault earthquakes, the attenuation equations used are the equivalent of Boore-Atkinson, Campbell-Bozorgnia, and Chiou-Young. While the attenuation equations used to obtain PGA values from subduction earthquake sources are Atkinson-Boore, Youngs, and Zhao. PGA value of earthquake source Subduction in bedrock 0.0374 g. While the PGA value on the surface is 0.0769 g. Whereas the PGA value in the fault source (Hard Fault) in bedrock ranged from 0.0376 g, while the PGA value on the surface ranged from 0.0573 g. Areas that have a severe impact if an earthquake originates from a fault are Koto Tengah District, West Padang Subdistrict, and North Padang Subdistrict with the highest amplification value of 1.7690 ( 9 times) which indicates that the magnification of the area is high. Whereas in the case of an earthquake with an earthquake source subduction area which is very vulnerable is West Padang District, Koto Tengah District, Padang Utara District with an amplification value of 2.0607 ( 9 times).
IDENTIFIKASI STRUKTUR BAWAH PERMUKAAN MENGGUNAKAN METODE MAGNETOTELLURIK 2D DI DAERAH CEKUNGAN BINTUNI SEBAGAI POTENSI HIDROKARBON Ririn Yulianti; Syamsurijal Rasimeng; Karyanto Karyanto; Hidayat Hidayat; Noor Muhammad Indragiri
Jurnal Geofisika Eksplorasi Vol 4, No 2 (2018)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v4i2.18

Abstract

Magnetotelluric research was done in hydrocarbon prospect area of Bintuni basin, West Papua province. The purpose of this research is to identificate hydrocarbon prospect in subsurface structure using 2D resistivity section. Data processing step for the research are; (i) Data transformation from time domain to frequency domain using Fourier transformation. (ii) Filtering process using Robust No Weight, Robust Rho Variance and Robust Ordinary Coherency. (iii) XPR selection and formatting data into EDI file. (iv) 2D resistivity section modeling using inversion. The result of this research based on 2D resistivity section in Klasafat formation have resistivity value about 1 – 20 Ωm. From 0 until 1000 meter below the surface the main lithology is claystone that identified as caprock. Kemblengan formation have resistivity value about 20 – 90 Ωm in 3500 meter under surface with main lithology lime-sandstone and identified as a reservoir. Tipuma formation have resistivity value about 0.62 – 2 Ωm in 8000 meter under surface with main lithology claystone. Kemun formation have resistivity value about 20 – 32 Ωm in 6000 meter under surface with main lithology sandstone and identified as a basement.
PENGOLAHAN DATA MIKROTREMOR BERDASARKAN METODE HVSR DENGAN MENGGUNAKAN MATLAB Winda Styani Yuliawati; Syamsurijal Rasimeng; Karyanto Karyanto
Jurnal Geofisika Eksplorasi Vol 5, No 1 (2019)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v5i1.22

Abstract

The research has conducted to get the result of Matlab program for microtremor data processing. The purpose of this research is to apply Matlab software into microtremor data processing. The microtremor is the ground motion to identify earthquake vulnerability by using HVSR (Horizontal to Vertical Spectral Ratio) method. The HVSR method for comparing both of horizontal component and vertical component on microtremor wave to obtain the result dominant frequency(f0) based on the high spectrum H/V value from the analysis of HVSR curve. Based on this research which concludes that microtremor data processing has processed using Matlab software. The result of this data processing gives similar value from the geopsy software. The value of dominant frequency by Matlab software and geopsy software calculation are classified on the site class type II which is dominantly alluvium. Whereas, the result of dominant period by geopsy and Matlab are classified on the site class type I which shows as the bedrock.
ANALISIS PENDUGAAN BAHAYA KEGEMPAAN DI BATUAN DASAR UNTUK WILAYAH LAMPUNG MENGGUNAKAN METODE PSHA Mhd Azri Pangaribuan; Syamsurijal Rasimeng; Karyanto Karyanto; Rudianto Rudianto
Jurnal Geofisika Eksplorasi Vol 5, No 3 (2019)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v5i3.32

Abstract

Analysis of seismic hazard estimation is one method for estimating the effect of earthquakes. The purpose of this study was to determine the maximum value of ground acceleration in bedrock or PGA values for the Lampung Province region. This analysis of seismic hazard estimation is carried out by a probabilistic seismic hazard analysis (PSHA) method. In the process of estimating the influence of earthquakes, the PSHA method principally uses 3 types of earthquake sources, namely the source of background earthquakes, subduction earthquakes (earthquake subduction) and fault earthquakes (faut). The calculation of the estimated seismic hazard value is carried out using the 2007 USGS PSHA program. The distribution of seismic hazard values for the Lampung Province region on bedrock with a 500-year return period or a 10% probability on the PGA condition (T = 0) is 0.1 g to 1, 3 g and a 2500 year return period or a probability of 2% in the PGA condition (T = 0) is 0.1 g to 1.3 g.
Co-Authors Achmad Subari Aisah Yuliantina Akroma Hidayatika Ambrosius Hernawan Wibisono Amelia Isti Ekarena Andrian Wilyan Djaja Annur Istikomah Aprillia Yulianata Arief Putih Prabowo Arif P Prabowo Arif P Prabowo Arsy Nurrochman Assegaf, Muhammad Alimuddin Hamzah Ayu Safira, Ayu Azis Riyanti Bagus Sapto Mulyanto Dani, Ilham Dewi Wijayanti Dewi Wijayanti Dewi, Soraya Tiana Egie Wijaksono Eko Rananda Elen Novia Limswipin Emir Dzakwan Kamal Zein F Alami Fadhil Muhammad Nizam Fahruddin Fahruddin Farrasha, Muthia Firda Amalia Gita Purna Rae Wanudya Gusti Aldy Haqqie Ramadhan Hesti Hesti Hidayat Hidayat Hilman Sabiq Ibrahim Ibrahim Ida Bagus Suananda Yogi Ida Bagus Suananda Yogi Ida Bagus Sunanda Yogi Idabagus S Yogi Iis Ratna Sari Ilham Dani Ilham Dani Istikomah, Annur Ivana Jayarani Ivana Jayarani Sitompul K Karyanto Karyanto, Karyanto La Ode Safiuddin La Ode Safiuddin Ledia Damayanti Lintang Prabowo Luthfi Rahmawati Maria Nova NafTalita Masdar Helmi Medi K Putri Mhd Azri Pangaribuan Muhammad Fikri Azhari Muhammad Nasri Muhammad Nurul Muhammad Rasyid Ridho Mustaid Yusuf Nandi Haerudin Nando Liven Konstanta Noor Muhammad Indragiri Nurlina Nurlina Ordas Dewanto Ordas Dewanto, Ordas PM Haidar Pratama, Tectona Putra Epriyan Rahmat C Wibowo Rahmawati, Luthfi Rahmi Mulyasari Ramadhan, Haqqie RC Wibowo Restu Wildanu Ahadi Ririn Yulianti Rudianto Rudianto Rustadi ., Rustadi Rustadi Rustadi S Suharno Sabrianto Aswad, Sabrianto Sakka Sakka Sari, Iis Ratna Sianturi, Rizky J. Soulthan Salahudin Al Ayubi Subarsyah Subarsyah Sudarningsih Sudarningsih Suharno Suharno Suharno Suharno Suharno Sultan Al Ghifari Supardi . Supardi Supardi Surbakti, Lucky Dolinta Syamsuddin Syamsuddin Syamsuddin, Erfan Syihab, Mufly Fadla Tiara Andika Fadila Tugiyono Tugiyono Ulfa Wahyuningsih Valentino Manurung, Andro Varenza Novita Yandi Wibowo, Rahmat Catur Widya Putri Syahranti Wijaksono, Egie Winda Styani Yuliawati Yandi, Varenza Novita Yeri, Nazhifah Ananda Yoga Kurniawan Yogi, Sunanda Zein, Emir Dzakwan Kamal