Article Per Year (5 Year)
p-Index From 2020 - 2025
0.882
P-Index
This Author published in this journals
All Journal Science and Technology Indonesia Journal of Science and Applicative Technology Indonesian Physical Review Navigation Physics : Journal of Physics Education Makara Journal of Science
Ikah N. P. Permanasari
Department Of Physics, Faculty Of Sciences, Institut Teknologi Sumatera, Lampung 35365
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Other

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
Determining Soft Layer Thickness Using Ambient Seismic Noise Record Analysis in Kota Baru, South Lampung Ipmawan, Vico Luthfi; Permanasari, Ikah N. P.; Siregar, Rahmat Nawi
Makara Journal of Science Vol. 23, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The local site effect of an earthquake can be calculated through an analysis of short period ambient noise, known as microtremors. The fundamental frequency and amplification factors can be identified by analyzing microtremors using the Horizontal to Vertical Spectral Ratio (HVSR) method. This information can then be used to determine the thickness of the soft layers of sediment. This study analyzed microtremor recordings made in Kota Baru, South Lampung. The amplification factor range according to the HVSR method was 2.3 to 6.17, and the fundamental frequency range was 0.56 Hz to 1.46 Hz. Some spectrums exhibit two peaks with f0 > f1. We suggest that these locations have two layers with significant impedance contrast, which aligns with the geological conditions. The center of the Kota Baru area, especially the region around T11 and T15, has a thicker soft layer than the outskirts; in the central area, the soft layer is approximately 85 to 102 meters thick. The western part of the analyzed area has a shallower soft layer of about 32 to 46 meters. The analysis indicates that the western part has less amplification because it is shallower than the other parts of the analyzed region.
Mathematical Model of Landslides with Curved Sliding Plane Using Fracture Criterion of Solid Soil-Rock System Ikah Ning Prasetiowati Permanasari; Lilik Hendrajaya; Gunawan Handayani
Science and Technology Indonesia Vol. 7 No. 1 (2022): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1017.811 KB) | DOI: 10.26554/sti.2022.7.1.1-8

Abstract

Alluvial cliff with high slope and step has been known to cause curving sliding plane. This phenomenon is adopted as a knowledge, but it has never been studied theoretically. In this paper, mathematics derivation phenomenon is proposed using special model of 11 fracture criterion ????-????. The quantity of ???? is A???? 2 with A is a friction coefficient of stress ???? 2 . The failure model was substituted to the corresponding Mohr circle resulting the expected curve. The curve was used to measure the observed field profile to obtain the friction coefficient A.
Effect of Azimuthal Variability in Estimation of HVSR Parameters and Ground Shear Strain at Kota Baru, South Lampung, Indonesia Ipmawan, Vico Luthfi; Prastowo, Rizqi; Iqbal, Mochamad; Permanasari, Ikah Ning Prasetiowati; Herman, Sofiana
Journal of Science and Applicative Technology Vol. 9 No. 1 (2025): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v9i1.2107

Abstract

Kota Baru, a potential capital of Lampung Province in South Lampung, Indonesia, faces significant earthquake risks due to the Great Sumatran Fault and the Sumatra Megathrust. Geologically, the area is part of the Plio-Pleistocene Lampung Formation, predominantly composed of rhyolite-dacite tuff and volcanoclastic tuff, which can amplify seismic shaking. This study investigates azimuthal variations in the Horizontal-to-Vertical Spectral Ratio (HVSR) across 15 locations in Kota Baru to identify their underlying causes. The results show notable changes in peak amplitude (Ao) and dominant frequency (fo) across different azimuths, with Mean Absolute Deviations (MAD) ranging from 0.96 to 5.71 for Ao and from 0.00 to 1.57 for fo. Maximum HVSR values were predominantly observed at azimuths below 30° across most regions. These variations are likely related to differences in soft layer thickness and/or the presence of a suspected fault near the study area, both of which could influence seismic wave propagation. A model of an 8.9-magnitude megathrust earthquake revealed no significant differences in Ground Shear Strain values, with results remaining within the same Modified Mercalli Intensity (MMI) scale. Therefore, despite azimuthal variability, the assumption of isotropic ambient noise in Kota Baru remains valid.
Magnetic data analysis using 2D inversion: A case study from Terak Radiogenic Geothermal area, Bangka Island, Indonesia Siregar, Rahmat Nawi; Rohim, Miftahul; Permanasari, Ikah Ning Prasetiowati; Puspitarum, Deska Lismawenning; Umam, Rofiqul
Navigation Physics : Journal of Physics Education Vol 7, No 1 (2025): Navigation Physics : Journal of Physics Education Vol. 7 No. 1 Tahun 2025
Publisher : UNIVERSITAS INDRAPRASTA PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/npjpe.v7i1.4111

Abstract

The presence of geothermal manifestation such as Terak hot spring near granite massive bodies on Bangka Island raises an importatnt question about the subsurface characteristics of a potential radiogenic system. As traditional geothermal system in Indonesia is well known, research must now focus on understanding the radiogenic system, especially on the subsurface information. This study addresses the local magnetic susceptibility of Terak subsurface hot spring by performing magnetic method. The integration of 2D to 3D magnetic data, field observations and geological information show high susceptibility data (>0.005 SI) which are indicated as granite intrusion which act as the heat source. A central zone of lower susceptibility (<0.005 SI) displays a distinct pattern, interpreted as a fracture zone as the hydrothermal fluid pathways. The identification of recharge area further supports the interpretation of an active hydrothermal system. The result of this study are in good agreement with the geological framework of the region and contribute to a better understanding of radiogenic geothermal systems in Indonesia.
HAWKING TEMPERATURE IN SCHWARZSCHILD BLACK HOLES WITH QUINTESSENCE DARK ENERGY Widiyani, Agustina; Sari, Ana Novita; Permanasari, Ikah Ning Prasetiowati; Satria, Eko; Pohan, Azrul Sulaiman Karim; Kesuma, Weni Ayu Puja; Pardede, Indra; Suroso, Agus
Indonesian Physical Review Vol. 8 No. 2 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i2.454

Abstract

Black holes are thermodynamic objects that emit Hawking radiation near the event horizon of a black hole according to the theory of quantum gravity in curved space-time. This radiation is manifested as the temperature of a black hole, known as the Hawking temperature. According to black hole thermodynamics, the black hole horizon area corresponds to the entropy. The increase in the horizon area is predicted due to the influence of dark energy, which can push the horizon of the black hole away from its center, thus significantly affecting the radiation of the black hole. Here, we investigate the Hawking temperature of the Schwarzschild black hole under the effect of quintessence dark energy. The results show that the increase in quintessence reduces the horizon radius of the black hole and lowers its Hawking temperature, highlighting the direct relationship between dark energy and black hole dynamics.
LANDSLIDE VULNERABILITY ANALYSIS BASED ON THE SEISMIC VULNERABILITY INDEX USING THE HVSR MICROTREMOR METHOD ON CLIFF AREAS IN HANURA VILLAGE, TELUK PANDAN DISTRICT, PESAWARAN REGENCY Permanasari, Ikah Ning Prasetiowati; Ba’asyir, Indi Nurazizah; Setiawan, Muhamad Ragil; Pardede, Indra; Monica, Yeli
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.484

Abstract

Way Ratai Road in Pesawaran Regency connects tourist areas managed by the Lampung Provincial Government. This road has cliffs with steep slopes, which have the potential to cause landslides. This research is very important because Way Ratai road is the only access road to Pesawaran beach tourism which is the main tourist destination of Lampung Province. Moreover, Way Ratai road is also the only access road connecting to the provincial capital of Bandar Lampung. This research was conducted to determine the soil vulnerability to seismic vibration on two cliffs around Way Ratai Road, Teluk Pandan District, Pesawaran Regency. The method used was microtremor signal recording with the Horizontal Vertical to Spectral Ratio (HVSR) method to determine the amplification factor (), dominant frequency (), sediment thickness (H), and seismic vulnerability index (Kg). The first cliff's measurement and data processing results showed an amplification factor () value of 2.74 - 3.70, a dominant frequency () of 3.75 - 4.56 Hz, a sediment thickness (H) of 14.09 m, and a seismic vulnerability index (Kg) of 2.39 m²/s. On the second cliff, the results showed an amplification factor () value of 2.27 - 3.40, a dominant frequency () of 3.54 - 7.20 Hz, a sediment thickness (H) of 9.33 m, and a seismic vulnerability index (Kg) of 1.84 m²/s. In term of seismic vibration, both cliffs, prone to landslides, have high stability against seismic vibrations. In the event of a landslide on these two cliffs, the estimated slip surface on the first cliff would be translational, and the second cliff would be a combination of translational and slight rotational, with an estimated volume of soil that could potentially slide on the first cliff is 30,492.16 m³ and on the second cliff, it is 27,188.92 m³.
Co-Authors Agus Suroso Ba’asyir, Indi Nurazizah Eko Satria Gunawan Handayani Herman, Sofiana Indra Pardede Iqbal, Mochamad Kesuma, Weni Ayu Puja Lilik Hendrajaya Monica, Yeli Pohan, Azrul Sulaiman Karim puspitarum, deska lismawenning Rahmat Nawi Siregar Rizqi Prastowo Rofiqul Umam Rohim, Miftahul SARI, ANA NOVITA Setiawan, Muhamad Ragil Siregar, Rahmat Nawi Vico Luthfi Ipmawan Widiyani, Agustina