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All Journal JFA (Jurnal Fisika dan Aplikasinya)
Bagus Jaya Santosa Bagus Jaya Santosa
Department of Physics, Institut Teknologi Sepuluh Nopember, Kampus ITS-Sukolilo Surabaya
Physics

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Relokasi Hypocentre Gempa Bumi Dengan Velest (JHD) dan Estimasi Sesar Daerah Sumatra Selatan: Irwansyah Ramadhani, Bagus Jaya Santosa Irwansyah Ramadhani Irwansyah Ramadhani; Bagus Jaya Santosa Bagus Jaya Santosa
Jurnal Fisika dan Aplikasinya Vol 13 No 2 (2017): June 2017 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v13i2.2744

Abstract

Earthquake is an unpredictable natural phenomena in occurance which has harmfull consequences. In high magnitude, it can cause other disaster i.e. tsunami which result in hard demage infrastructure and loss of population. One can not determine earthquake presence exactly, however can estimate earthquake prone zone, major hard demage zone, and next earthquake presence. They can be estimated through hypocentre determination and earths model. Velest is an JHD ((Join Hypocentre Determination) based method which applies all events to inverted simultaneously and results true hypocentre of earthquake. In other hand, Velest can determine one dimensional earths model based P and S wave travel time data. Then, earths characteristic can be determined by ISOLA. It is able to provide an imaging of fault in a research area through moment tensor. Both Velest and ISOLA applies in this research. Arrival time of P wave is analized by STFT and CWT algorithm. Then, Velest applies to earthquake events relocation while ISOLA applies to determine earths characteristic (fault) inSouthern Sumatra. This research note that velest is able to determine true hypocentre of earthquake well and one dimensional earth model of South Sumatra. In other hand, moment tensor of 4 events show geometry of fault in Souther Sumatra is dip-slip.
Local Waveforms Analysis to Estimate the Fault Plane of May 2008 Sumatra Earthquakes: Bagus Jaya Santosa, Bintoro Anang Subagyo Bagus Jaya Santosa Bagus Jaya Santosa; Bintoro Anang Subagyo Bintoro Anang Subagyo
Jurnal Fisika dan Aplikasinya Vol 13 No 2 (2017): June 2017 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v13i2.2747

Abstract

Five earthquakes source parameters in Sumatra have been estimated that occurred on May 3rd, 13th , 18-20th 2008, which earthquakes magnitude was over 5.4 Mw. To determine the earthquakes source parameters, we used three components local waveform. The seismogram data are inverted to achieve the earthquake source parameters. To investigate the depths of earthquakes, the determination used the highest value of variance reduction of waveform analysis. To identify the fault plane of the earthquakes, the H-C method is used. The research calculates also the length and width of the Fault planes.
Co-Authors Bintoro Anang Subagyo Bintoro Anang Subagyo Irwansyah Ramadhani Irwansyah Ramadhani