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Komang Ngurah Suarbawa
Program Studi Fisika, FMIPA, Universitas Udayana, Kampus Bukit Jimbaran, Badung, Bali, Indonesia, 80361
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Penentuan Asumsi Waktu Berakhirnya Gempa Susulan Studi Kasus Gempabumi Lombok 5 Agustus 2018 Audrey Vellicia; Komang Ngurah Suarbawa; Rudy Darsono
Kappa Journal Vol 3 No 2 (2019): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v3i2.1609

Abstract

Indonesia is located at the meeting point of three active tectonic plates. The consequence is the country is very prone to earthquake disaster, one of the most devastated events is Lombok earthquake occurred on 5 August 2018. The aim of this study is to estimated ending time of aftershock using Omori, Mogi I, Mogi II, and Utsu method. Based on the result of Mogi I and Utsu method which has the correlation coefficient closest to -1 it is predicted that aftershock will stop on 96th weeks after the mainshock. By calculating the time data obtained, it is predicted that the aftershock will stop on the first week of June 2020.
PENGARUH KETEBALAN LAPISAN PENYANGGA GaN TERHADAP STRUKTUR KRISTAL DAN SIFAT OPTIK FILM TIPIS GaN DITUMBUHKAN DENGAN METODE PULSED LASER DEPOSITION I Gusti Agung Putra Adnyana; Komang Ngurah Suarbawa; I Ketut Sukarasa
Jurnal Sains Materi Indonesia Vol 11, No 1: OKTOBER 2009
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (285.47 KB) | DOI: 10.17146/jsmi.2009.11.1.4560

Abstract

PENGARUH KETEBALAN LAPISAN PENYANGGA GaN TERHADAP STRUKTUR KRISTAL DAN SIFAT OPTIK FILM TIPIS GaN DITUMBUHKAN DENGAN METODE PULSED LASER DEPOSITION. Telah dilakukan studi pengaruh ketebalan lapisan penyangga Galium Nitrida, GaN terhadap struktur kristal dan sifat optik film tipis GaN yang ditumbuhkan dengan metode Pulsed Laser Deposition (PLD). Lapisan penyangga ditumbuhkan pada suhu 450ºC dan laju aliran nitrogen 100 sccm dengan waktu deposisi divariasikan antara 15 menit sampai 45 menit. Film yang diperoleh dikarakterisasi dengan Profilometer DEKTAK IIA, Difraktometer sinar-X dan Spektroskopi UV-Vis. Ketebalan lapisan penyangga berpengaruhterhadap kualitas kristal dan sifat optik film tipis GaN yang ditumbuhkan di atasnya. Dari hasil analisis pola difraksi sinar-X dan spektrum UV-Vis, diketahui bahwa film tipis GaN yang ditumbuhkan di atas lapisan penyangga dengan ketebalan 184,6Å cenderungmemiliki orientasi tunggal (0002) yang lebih baik dengan Full Width at Half-Maximum (FWHM) 0,9º dan energi celah pita (Eg) = 3,4 eV dibanding film tipis GaN dengan ketebalan lapisan penyangga 370,2 Å dan 560 Å.
ANALISIS EFEK TAPAK LOKAL DARI GEOLOGI TANAH DI BADUNG SELATAN DAN KOTA DENPASAR DENGAN SURVEI MIKROTREMOR (STUDI KASUS GEMPABUMI NUSADUA 13 OKTOBER 2011) Adityo Mursitantyo; Komang Ngurah Suarbawa; Ardhianto Septiadhi
BULETIN FISIKA Vol 16 No 2 (2015): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

Local site effect from geology on South Badung and Denpasar City by microtremor measurements has been investigated. Ground predominant period was indicated by microtremor measurements with HVSR (Horizontal to Vertical Spectral Ratio) method. Subsoil A type was obtained by ground predominant period on Peguyangan, Pemecutan Kaja, Jimbaran, Uluwatu, and Jimbaran with ground predominant period range between 0.02 – 0.20 second. Subsoil B type was obtained on Canggu, Kerobokan, Denpasar City, Kesiman, Sanur, Sesetan, Kuta, Nusadua and Benoa Peninsula with ground predominant period range between 0.26 – 0.38 second. Subsoil C type was obtained on Seminyak, northern Sesetan and Sanur coast with ground predominant period range between 0.46 – 0.61 second. The conclusion, based on predominant period, geology, and data of damage due to October 13th 2011 Nusadua earthquake, areas with subsoil B and C type more susceptible than areas with subsoil A type when earthquake occur.Keywords : local site effect, microtremor, predominant period, HVSR
Studi Mitigasi Bencana Tsunami Dengan Menentukan Run Up Dan Waktu Tiba Tsunami Daerah Banyuwangi I Putu Agum Suriajaya Maha Putra; Komang Ngurah Suarbawa; I Gusti Agung Putra Adnyana
BULETIN FISIKA Vol 23 No 2 (2022): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2022.v23.i02.p08

Abstract

Tsunami disaster mitigation studies have been conducted in Banyuwangi Regency by conducting research on the analysis of run-ups and tsunami arrival times for the Banyuwangi area. The research was conducted at the Meteorology, Climatology and Geophysics Agency region 3 Denpasar using the software Tsunami Observation and Simulation Terminal (TOAST). The data used in this study is secondary data in the form of magnitude and data on the depth of underwater earthquakes, with magnitudes of 7.0 to magnitude 8.5 that have the potential to cause tsunamis and earthquake depth data of 18 km to 65 km. From the results of data processing with the TOAST application obtained the results of run-up and tsunami arrival time. Maximum run-up data was obtained by 9,718 m while the fastest tsunami arrival time data to the coast is 4 minutes after the tsunami. Maximum run-up data is then used for mitigation and the fastest tsunami arrival time then can be made a mitigation scenario for tsunami disaster.
Determination of vp/vs on Bali Province: Case of Bali Earthquake March 22, 2017 Febi Niswatul Auliyah; Komang Ngurah Suarbawa; Indira Indira
BULETIN FISIKA Vol 19 No 2 (2018): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

P-wave velocity and S-wave velocity have been investigated in the Bali Province by using earthquake case studies on March 22, 2017. The study was focused on finding out whether there were anomalies in the values of vp/vs before and after the earthquake. Earthquake data was obtained from the Meteorology, Climatology and Geophysics Agency (BMKG) Region III Denpasar, which consisted of the main earthquake on March 22, 2017 and earthquake data in August 2016 to May 2017. Data was processed using the wadati diagram method, obtained that the vp/vs on SRBI, IGBI, DNP and RTBI stations are shifted from 1.5062 to 1.8261. Before the earthquake occurred the anomaly of the value of vp/vs was found on the four stations, at the SRBI station at 10.35%, at the IGBI station at 16.16%, at DNP station at 12.27% and at RTBI station at 4.62%.
PENENTUAN PRODUK RADAR CUACA PALING TEPAT UNTUK MEMBUAT PERINGATAN DINI CUACA EKSTRIM DENGAN MENGGUNAKAN METODE ANALYTICAL HIERARCY PROCESS (AHP) Kadek Sumaja; Komang Ngurah Suarbawa; Decky Irmawan
BULETIN FISIKA Vol 16 No 1 (2015): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

To solve the problem of determining the most appropriate products RADAR weather to make early warning of extreme weather that is efficient, effective, fast and precise then used method of Analytical Hierarcy Process (AHP). Analytical Hierarchy Process (AHP), which is a decision support system developed by Thomas L. Saaty. Using this method could be determined by the priority of multiple criteria analysis with pairwise comparisons (Pairwise Comparison) of each criteria and alternatives that have been determined. Prioritization is done by using the eigenvectors of the iteration of the squares of the pairwise comparison matrix. Consistency test will be performed on the data obtained to determine the feasibility of the data so the data can be used for prioritization of comparison criteria, comparison of alternatives and determination of the best alternative that will determine the priority value of the product weather RADAR to make early warning of extreme weather. From the results obtained by the determination of the best alternative, PPI products have the highest weights, followed by the product CMAX, then the product UWT and the final is product TRACK. Keywords: weather RADAR, AHP, eigenvectors
Analisis Kerentanan Wilayah Terhadap Gempabumi Berdasarkan Parameter Nilai Kerapuhan Batuan (B-Value) Dan Peak Ground Acceleration (PGA) Di Provinsi Bali Amalia Dwi Lestari; Komang Ngurah Suarbawa; I Wayan Supardi; I Putu Dedy Pratama
BULETIN FISIKA Vol 23 No 2 (2022): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2022.v23.i02.p04

Abstract

Abstract - Bali is an area that is prone to earthquake hazards. This is because Bali is flanked by two causes of earthquakes, namely a subduction zone in the south and a back arc fault in the north. One of the efforts to minimize damage or loss caused by earthquakes is to analyze the vulnerability of an area to earthquakes. In this study, the earthquake parameters used as hazard indicators were the level of rock fragility (b-value) and maximum ground acceleration (PGA). Based on the results of the b-value calculation using the Maximum Likelihood method, the rock fragility level for the Bali region is obtained from 0.370 to 1.419. While the results of the PGA calculation using two empirical methods, namely the empirical M.V. Mickey and Lin Wu's empirical method is known that the empirical method of M.V. Mickey is more suitable for use in the Bali area than Lin Wu's empirical method, with PGA values ??ranging from 517.32-828.58 gal. So based on the results of the analysis of the two earthquake parameters, it is found that the area of ??Bali that is vulnerable to earthquakes is the western part of Buleleng Regency and most of Jembrana Regency. Keywords: b-value, PGA, Maximum Likelihood, M.V. Mickey, Lin Wu, Bali
Analisis Energi Potensial Gempabumi pada Zona Subduksi Wilayah Bali Ni Putu Juliyant Ananda Rika Pangastuti; Komang Ngurah Suarbawa; I Ketut Putra; Ni Luh Desi Purnami
BULETIN FISIKA Vol 23 No 2 (2022): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2022.v23.i02.p09

Abstract

Research has been carried out to analyze the potential energy of earthquakes in the subduction zone in the Bali region which aims to determine the seismicity index, a-value, b-value, return period and earthquake potential energy in the Bali region at coordinates 114.2º east longitude - 115.9º east longitude and 11 ,7º south latitude – 7.5º south latitude. Earthquake data used in the form of the date and time of the earthquake, earthquake coordinates in the form of latitude and longitude, earthquake depth and magnitude. The research was conducted using secondary data from the USGS (United State Geological Survey) earthquake catalog from 1970 to 2020 with a magnitude of 3-10. The data is modeled using Arc Gis software to obtain a seismicity map. The seismicity index, a-value, b-value, return period and earthquake potential energy were obtained using the least square method. Obtained a-value = 5.3 and b-value = -0.74, a seismicity index of 0.083 and an earthquake return period with a tested magnitude of M0 of 6 Mb of 12 years. The earthquake potential energy for this subduction zone is also obtained at 3,616×1014 J.
ANALISIS POLA SEBARAN ASAP TERHADAP KONDISI METEOROLOGI DI PULAU KALIMANTAN TERKAIT KEBAKARAN HUTAN DAN LAHAN (STUDI KASUS: KEBAKARAN HUTAN PADA BULAN SEPTEMBER 2019) Ivan Bachtiar Pandapotan; Suarbawa Komang Ngurah; I Gusti Agung Widagda
BULETIN FISIKA Vol 23 No 1 (2022): BULETIN FISIKA February Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2022.v23.i01.p03

Abstract

A research has been carried out regarding forest and land fires that occurred in the Kalimantan area in September 2019. Meteorological factors such as rainfall, humidity, air temperature, speed and wind direction are parameters that can affect the process of fire occurrence and smoke distribution. In this study, meteorological data and smoke images from BMKG Tuban, Bali were used which were processed and analyzed so that they could be used to interpret meteorological conditions and smoke patterns on the island of Kalimantan. The smoke image that has been collected is processed using HYDRA software on channels 1, 2, and 7 and SATAID software on channels 3, 4, and 6 so that the color of the smoke and the distribution of smoke from forest fires will be visible in the form of images. Based on the results of the study, it can be concluded that the meteorological factors that cause forest fires are rainfall which quite low/minimal, temperature with an average of >30?, air humidity of 70%-80%, and the pattern of smoke spread is caused by winds moving from east to westward at a speed of 10 km/h to 37.04 km/h.
Earthquake Relocation in Northern Bali Island in 2015-2017 using Double Difference Method (DD) Nandaru Diaz; Komang Ngurah Suarbawa; Adityo Mursitantyo
BULETIN FISIKA Vol 19 No 2 (2018): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

A research about earthquake relocation in Northern Bali Island in 2015 – 2017 using the Double Difference (DD) method has been carried out. Earthquake relocation is important to get some informations about earthquake locations with high accuracy, fault zone identification, earthquake distribution and seismic analysis. The results of the relocation indicated that there was a displacement of the location of earthquake that formed moving closer to the earthquake source namely a fault. Relocation using HypoDD program gave high accurate result indicated by the RMS residual time value close to zero e.g. 0,000 - 0.01 which mean the results of calculations and observations are closed to the real value.
Co-Authors Adityo Mursitantyo Adityo Mursitantyo Adnyana, I Gusti Agung Putra Adnyana, IGA Putra Amalia Dwi Lestari Anin Nuril Firdausi Ardhianto Septiadhi Ardhianto Septiadhi Astra, Made Kris Adi Audrey Vellicia Baskoro, Winardi Tjahyo Crisanti Uduk, Maria Decky Irmawan Elvin Riyono Febi Niswatul Auliyah Gunawan, Tomy Gusti Ngurah Sutapa Hafidzi, Aldyan I G. A. Widagda I Ketut Putra I Ketut Putra I Made Yuliara I Nengah Sandi I Putu Agum Suriajaya Maha Putra I Putu Arix Putra Wiguna I Putu Dedy Pratama I Wayan Supardi I Wayan Wisnawa Saputra I.B. Alit Paramarta Ida Bagus Alit Paramartha Indira Indira Indrayana, Putu Tedy Ivan Bachtiar Pandapotan Jalut, Laura Laudensia Senly k krisna g Kadek Darmo Kadek Sumaja Kadek Sumaja Kadek Sumaja Kholidatul Islamiyah Laura Laudensia Senly Jalut Lestari Naomi L. Pandiangan Lestari, Amalia Dwi Made Padmika Made Sumadiyasa Mahayani, Ni Wayan Dewi Melki Adi Kurniawan Nandaru Diaz Ni Kadek Nova Anggarani Ni Luh Desi Purnami Ni Nyoman Susi Kesuma Wardani Ni Nyoman Susi Kesuma Wardani Ni Nyoman, Ratini Ni Putu Juliyant Ananda Rika Pangastuti Ni Wayan Dewi Mahayani Nurmalasari, Ni Putu Yuni Nyoman Wendri Padmika, Made Putu Suardana Ramadhan, Rafly Rizqyta Ridwan Kusnandar Romadhon Ilham Imani Rudy Darsono Ryan Juliston Pangihutan Simanjuntak Saputra, I Wayan Wisnawa Satriya Wibawa, I Made Soleh, Anggun Mohamad Sukarasa, I Ketut Sumaja, Kadek Syamsul Arifin Tomy Gunawan Tyastama, Arief Wardani, Ni Nyoman Susi Kesuma Wisnu Ari Adi Wisnu Ari Adi