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Journal : Journal of Engineering and Technological Sciences

Estimation of Slip Distribution of the 2007 Bengkulu Earthquake from GPS Observations Using the LeastSquares Inversion Method Awaluddin, Moehammad; Meilano, Irwan; Widiyantoro, Sri
Journal of Engineering and Technological Sciences Vol 44, No 2 (2012)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (579.484 KB) | DOI: 10.5614/itbj.eng.sci.2012.44.2.6

Abstract

Continuous  Global  Positioning  System  (GPS)  observations  showed significant  crustal  displacements  as  a  result  of  the  Bengkulu  earthquake occurring on September 12, 2007. A maximum horizontal displacement of 2.11 m was observed at PRKB station, while the vertical component at BSAT station was lifted up with a maximum of 0.73 m, and the vertical component at LAIS station had subsided  –0.97 m. Adding more constraints on the inversion for the Bengkulu earthquake slip distribution inferred from GPS observations can help solve  the  underdetermined  least-squares  inversion.  Checkerboard  tests  were performed  to  help  conduct  the  weighting  for  constraining  the  inversion.  The inversion calculation yielded an optimal value for the slip distribution by giving the smoothing constraint a weight of 0.001 and the slip constraint a weight of = 0 at the edge of the earthquake rupture area. The maximum co-seismic slip of the optimal inversion calculation was 5.12 m at the lower area of PRKB station and BSAT station. The seismic moment calculated from the optimal slip distribution was 7.14 x 1021 Nm, which is equivalent to a magnitude of 8.5.
Estimation of Slip Distribution of the 2007 Bengkulu Earthquake from GPS Observations Using the LeastSquares Inversion Method Moehammad Awaluddin; Irwan Meilano; Sri Widiyantoro
Journal of Engineering and Technological Sciences Vol. 44 No. 2 (2012)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.eng.sci.2012.44.2.6

Abstract

Continuous  Global  Positioning  System  (GPS)  observations  showed significant  crustal  displacements  as  a  result  of  the  Bengkulu  earthquake occurring on September 12, 2007. A maximum horizontal displacement of 2.11 m was observed at PRKB station, while the vertical component at BSAT station was lifted up with a maximum of 0.73 m, and the vertical component at LAIS station had subsided  "“0.97 m. Adding more constraints on the inversion for the Bengkulu earthquake slip distribution inferred from GPS observations can help solve  the  underdetermined  least-squares  inversion.  Checkerboard  tests  were performed  to  help  conduct  the  weighting  for  constraining  the  inversion.  The inversion calculation yielded an optimal value for the slip distribution by giving the smoothing constraint a weight of 0.001 and the slip constraint a weight of = 0 at the edge of the earthquake rupture area. The maximum co-seismic slip of the optimal inversion calculation was 5.12 m at the lower area of PRKB station and BSAT station. The seismic moment calculated from the optimal slip distribution was 7.14 x 1021 Nm, which is equivalent to a magnitude of 8.5.
Co-Authors Abdi Sukmono Abdi Sukmono, Abdi Adnan Khairi Afriyanto Afriyanto Aisyah Arifin Aisyah Arifin Ajeng Kartika Nugraheni Syafitri Alfian Budi Prasetya Alfien Rahmenda Ali Amirrudin Ahmad Amal Fathullah, Amal Amri Perdana Ginting Ana Rosida Andika Malik Andika Rizal Bahlefi Andre Hermawan Andri Suprayogi Anggi Tiarasani Anisa Rachmawati, Anisa ARGNES DIONANDA RESZA PRADIPTA Arief Laila Nugraha Arief Laila Nugraha Arief Laila Nugraha Arintia Eka Ningsih Ario Damar Wicaksono Armenda Bagas Ramadhony Aruma Hartri Aufan Niam Aulia Fikki Wicaksono Aysha Puspa Pertiwi Ayu Nur Safi'i Bambang Darmo Y Bambang Darmo Yuwono Bambang Darmo Yuwono Bambang Darmo Yuwono Bambang Sudarsono Bambang Sudarsono Bandi Sasmito Bhekti Hapsari Bilqis, Ramadhani Sarah Alicya Bobby Daneswara Indra Kusuma Brinton Patuan Sitorus Budi Prayitno Cindy Puspita Sari Damar Ismoyo Danang Budi Susetyo Desita Khrisna Putri, Dewa, Kusuma Hangga Dewi Shinta Septifany Dian Rizqi Ari Wibowo Dimas Bagus Dina Wahyuningsih Dwi Arini Dzaki Adzhan Ega Gumilar Hafiz Enersia Ihda K. U Extiana, Kiky Fadhilla Shara Denafiar Fajar Dwi Hernawan Fanni Kurniawan Fanny Rachmawati Fathan Aulia Fauzi Iskandar Fauzi Janu Amarrohman, Fauzi Janu Fauzi Janu Ammarohman Febrian Pramana Putra Fetra Kristina Harianja Gina Andriyani Habib Azka Ramadhani Hadi, Firman Hana Sugiastu Firdaus Hana Sugiastu Firdaus Hana Sugiastu Firdaus Handayani Nur Arifiyanti Haniah Haniah Hani’ah Hani’ah Haris Yusron Hayuningsih, Dwi Mastuti Heri Gusfarienza Heri Setiawan Ika Nurdianasari Ikhlasul Amal Ahyani Indra Laksana Irfan Tri Anggoro irwan meilano Johan Wisma Anggoro Joko Wibowo Juwita Widya Qur’ani Khairuddin Khairuddin Khofifatul Azizah Khofifatul Azizah Kiky Extiana Kindy Ibrahim Hari Kurniawan Adi Widiyanto L. M. Sabri Labib, Muhammad Faishal Laode M Sabri LAURENTIUS IMMANUEL YUDIT PRABOWO LM. Sabri Lolita, Diaz Amel Lorenzia Anggi Ramayanti Lufti Rangga Saputra LUKMAN MAULANA ABDILLAH Lutfi Eka Rahmawan Lutgar Sudiyanto Sitohang LUTHFI RAHMANDHANI Mahmudi, Fakhry Nur Maulana Eras Rahadi Meita Arddinatarta Moh Kun Fariqul Haqqi Mohammad Afif MOHAMMAD YUSUP LUTFI Much. Jibriel Sajagat, Much. Jibriel Muhamad Arif Debalano Muhamad Nurman Cholid Muhammad Bagus Salim Muhammad Danny Rahman Muhammad Hudayawan Nur L Muhammad Iqbal Akhsin Muhammad Maulana mahardika Amfa Muhammad Rifqi Andikasani Nanda Dewi Arumsari Nasytha Nur Farah Nella Wakhidatus Nina Ratnaningrum NOVAYA NURUL BASYIROH Nugrahanto, Prasetyo Odi Nur Lail, Muhammad Hudayawan Nurhadi Bashit Nurhadi Bashit Nurmalasari, Cici Nurnaning Aisyah Pardjono, P. Prya Adhi Surya Nugraha Putri, Alifa Salsabilla Rachmawati, Ekha Ramdhan Thoriq Setyabudi Renaud Saputra Purba Resi Diansismita Reza Nur Hidayat Rico Waskito Putro Rifki Purnama Aji Rifqi, Muhammad Alifian Risa Ayu Miftahul Rizky Riyadi, Elnatan Vieno Rizky Saputra Rofi'i, Nur Izha Jannah Roy Kasfari Sabri, Laode M. Safii, Ayu Nur Safira Devi Kirana Sandy Yudistira Mahardika, Sandy Yudistira Sarmedis Anrico Situmorang Satrio Wicaksono Satrio Wicaksono Sawitri Subiyanto Septian Dewi Cahyani Septiawan Setio Hutomo Setiaji Nanang Handriyanto Sigit Irfantoro Siregar, Afifah Zafirah Siti Fathimah Soraya Rizky Puspitasari Sri Widiyantoro Sry Suando Sinaga Susilo Susilo Sutomo Kahar Syachril Warasambi Mispaki Tiara Toyyibatul Arofah Tristika Putri Wahyu Entriana Kumala Dewi Wahyu Nur Rohim Wahyuddin, Yasser Wakhidatus, Nella Wibowo, Sidik Tri Wildan Ryan Irfana Yolanda Adya Puspita Yudo Prasetyo