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All Journal Jurnal Pendidikan Matematika (JUDIKA EDUCATION) PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Setyo Rahman, Aditya
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Education Electrical & Electronics Engineering Energy Mathematics Physics Other

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COMPARISON OF PEAK GROUND ACCELERATION VALUES BASED ON DETERMINISTIC APPROACH USING EMPIRICAL EQUATIONS FOR THE CIMANDIRI FAULT: PERBANDINGAN NILAI PEAK GROUND ACCELERATION BERDASARKAN PENDEKATAN DETERMINISTIK PERSAMAAN EMPIRIS UNTUK SESAR CIMANDIRI Haryanto; Setyo Budi, Agus; Setyo Rahman, Aditya; Dharma Persada, Yoga
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol. 13 (2025): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2024
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1301.FA03

Abstract

The Cimandiri Fault is often cited as the trigger for many large earthquakes in West Java. The Cimandiri Fault is a 100-km long active shear fault. This study aims to compare Peak Ground Acceleration (PGA) values generated by three empirical Ground Motion Prediction Equation (GMPE) equations, namely Boore (2003), Campbell (2003) and Chiou-Young et al. (2008), with a deterministic approach. The deterministic approach uses a simple formula that considers magnitude, distance and site conditions. The comparison results show that the PGA values predicted by the empirical equations of Boore, Campbell and Chiou Young are approximately the same, but there are several factors that differentiate the results of the three parameters. This indicates that the empirical equations consider more complex factors in predicting PGA, such as earthquake source mechanisms, geological structures and nonlinear effects. This study provides important information for understanding the distribution of PGA on the Cimnadiri fault. This information can be used to strengthen buildings and infrastructure in the future, thereby minimizing the risk of earthquake damage.
Klasifikasi Jenis Tanah di Kota Bengkulu Berdasarkan Metode  Horizontal To Vertical Spectra Ratio Istofiyah, Istofiyah; Supriyadi, Supriyadi; Adhi, M. Aryono; Setyo Rahman, Aditya; Pramono, Sigit; Sativa, Oriza; Yudhi Octantyo, Ardian; Fani Habibah, Nur
Jurnal Pendidikan Matematika : Judika Education Vol. 8 No. 6 (2025): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/7x5pfg74

Abstract

Bengkulu City is one of the regions in Indonesia with a high level of earthquake susceptibility. To understand the seismic characteristics of the soil in this area, this study employs the Horizontal-to-Vertical Spectral Ratio (HVSR) method based on microtremor data to identify the dominant frequency (F0) and amplification factor (A0), which play a crucial role in seismic microzonation analysis. This study collected 143 microtremor measurement points distributed across Bengkulu City, which were analyzed using Geopsy software to obtain dominant period (Tdom) values and classify soil types. The analysis results indicate that the dominant period values in Bengkulu City range from 0.09213 s to 0.722799 s, reflecting variations in soil characteristics across the region. Overall, Bengkulu City is predominantly composed of medium to hard soil, with most areas such as Pondok Kelapa, Muara Bangka Hulu, the southern part of Sungai Serut, Selebar, and Kampung Melayu classified as medium soil. Meanwhile, hard soil to bedrock classifications are found in Teluk Segara, Ratu Samban, Ratu Agung, Singaran Pati, and the southeastern part of Muara Bangka Hulu, which are dominated by the Alluvium and Terrace Alluvium formations. Additionally, soft soil areas are located in the central part of Sungai Serut, influenced by their proximity to water bodies such as lakes and swamps. These findings confirm that areas with soft soil have a higher potential for seismic amplification, making them more vulnerable to earthquake shaking. Therefore, the results of this study are expected to serve as a reference for disaster mitigation, particularly in earthquake-resistant infrastructure planning and construction in Bengkulu City.   Keywords: HVSR, Dominant period, Amplification
Perbandingan Metode Multi Analysis Surface Wave dan Metode HVSR dengan Mengidentifikasi Karakteristik Bawah Permukaan Jaringan Monitoring Gempabumi Wilayah Jawa Tengah Yogi Widjayanti, Retno; Adhi, M. Aryono; Pramono, Sigit; Setyo Rahman, Aditya; Tawakal, Moh.Iqbal; Ardiansyah, Adam
Jurnal Pendidikan Matematika : Judika Education Vol. 8 No. 6 (2025): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/2y7srw09

Abstract

A region’s geological medium provides distinct local features that affect the propagation of seismic waves. This study looked at subsurface conditions down to 30 meters in order to assess the potential for seismic wave amplification during earthquakes. This research aims to determine the subsurface characteristics using the shear wave (Vs) parameters obtained using the multichannel analysis of surface waves (MASW) method.Twenty-four vertical geophones with a natural frequency of 4.5 Hz were subjected to the MASW technique. Through shear wave analysis, site classification was conducted referring to the Indonesian National Standard (SNI) 1726:2019, enabling evaluation of potential amplification across various sites. Reference sensors were selected from locations across Central Java, including the MBJI (Banjarnegara), KWJI (Wonosobo), KBJN and GTJI (Temanggung), GBJI (Batang), NSM01 (Central Semarang), SMRI and SMRIB (Tembalang), and BOJI (Boyolali).The lowest Vs30 value (165.1 m/s) was recorded at site NSM01 (Pendrikan Kidul, Central Semarang), while the highest (1868 m/s) was recorded at MBJI (Majalengka, Banjarnegara). Most reference sites were classified as Site Class C (very dense soil and soft rock). However, NSM01 was categorized as Site Class E (Soft Soil), indicating a higher potential for ground motion amplification, while MBJI presented minimal amplification risk due to its hard rock base.The findings highlight the importance of subsurface characterization for seismic hazard mitigation. The variation in Vs30 across the study sites reflects the lithological differences that directly affect the ground response during seismic events. Therefore, MASW provides essential data for improving earthquake-resistant infrastructure planning in Central Java.
Co-Authors Adam Ardiansyah Agus Setyo Budi Aryono Adhi, Aryono Dharma Persada, Yoga Fani Habibah, Nur HARYANTO Istofiyah, Istofiyah Sativa, Oriza Sigit Pramono Supriyadi Supriyadi Tawakal, Moh.Iqbal Yogi Widjayanti, Retno Yudhi Octantyo, Ardian