GPS data in southern Sumatra, Indonesia, indicate crustal deformation associated to subduction zone and inland fault of Great Sumatran Fault (GSF). We analyze these deformation characteristics using campaign and continuous GPS data available in southern Sumatra from 2006-2014. After removing the effect of GSF in southern Sumatra and coseismic displacements of 2007 Bengkulu and 2012 Indian Ocean earthquake, we find that GPS sites experienced northwest-ward direction. These GPS velocities correspond to postseismic deformation of the 2007 Bengkulu earthquake and the 2012 Indian Ocean earthquake. We analyze strain using these velocities, and we find that postseismic strains in southern Sumatra are in the range of 0.8-20 nanostrain.
The use of fundamental components of multipurpose cadastre which can be used as basic information and backbone for government policy with geographical information system as a tool are applied in this research method to appraisecampus room. The process to appraise of the facilities in a room begins with collecting facilities data which related to attribute data and defining room boundary which related to spatial data. Room appraisal are analysed by firstly calculate room valuebasedon facilities and activity hours.The method to calculate room value is comparison of quantity and functionality of facilities in every room. Thorough analysis is conducted to separate room value data containing human errors. The determination of which category (high, medium, low) every room fit in is based on distribution of value of every room value which is free of human errors. Room appraisal using this research method will lead to optimize every campus room especially low category room. This approach is also effective way to record number of rooms and facilities of campus comprehensively.
Gempa bumi Samudera Hindia terjadi pada tanggal 2 Maret 2016 dengan magnitudo7.8 di sekitar zona subduksi Lempeng Sundaland. Implikasi tektonik dari gempa bumi dengan magnitudo di atas 7 ini diteliti karena implikasi tektonik gempa bumi di Samudera Hindia tahun 2012 sangat besar hingga Pulau Jawa. Penelitian ini bertujuan mendapatkan pengaruh gempa bumi Samudera Hindia tahun 2016 terhadap perubahan kecepatan subduksi. Data yang digunakan adalah data Global Navigation Satellite System (GNSS) kontinu di tujuh stasiun yang berada di Lempeng Indo-Australia dan Lempeng Sundaland. Data diolah dengan perangkat lunak ilmiah untuk mendapat solusi koordinat harian. Pada deret waktu koordinat, dilakukan perhitungan kecepatan degan regresi linier untuk data sebelum gempa bumi dan data setelah gempa bumi. Nilai kecepatan yang diperoleh digunakan untuk perhitungan regangan. Hal yang didapatkan dan dibahas adalah perubahan nilai kecepatan dan regangan, serta membandingkan arah kecepatan stasiun GNSS dengan arah kecepatan dari lempeng terkait. Kecepatan stasiun GNSS yang diperoleh berkisar 18 hingga 70 mm/tahun. Kecepatan stasiun GNSS mengalami penurunan dan regangan mengalami pertambahan nilai pemendekan setelah gempa bumi. Nilai perubahan semakin besar untuk stasiun yang lebih dekat ke Palung Sunda. Stasiun GNSS yang berada di pulau di sebelah barat Pulau Sumatra diduga berada di Blok Sumatra, pecahan dari Lempeng Sundaland.
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