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All Journal SEMIRATA 2015 Edumatsains
Mester Sitepu, Mester
Universitas Sumatera Utara, Medan
Agriculture, Biological Sciences & Forestry Chemistry Education Mathematics Physics

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Peramalan Terjadinya Gempa Bumi Tektonik untuk Wilayah Pulau Nias Menggunakan Metode Distribusi Weibull dan Eksponensial Malau, Nya Daniaty; Sitepu, Mester
EduMatSains Vol 1, No 1 (2016): Juli 2016
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Kristen Indonesia

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Nias Island is an island located west of North Sumatra dipesisir which has a fairly high level of seismicity. This paper discusses the problem of forecasting the occurrence of tectonic earthquakes for the island of Nias, located on the site: 0º19LU - 1º82LU and 96.97 BTº- 98.53ºBB. By using the data a powerful earthquake that caused damage. Tectonic earthquake forecasting is done with method 3 parameter Weibull distribution, two parameter Gumbel distribution and exponential distribution of parameter 1. using the data as much as 47 damaging earthquakes from year 1960 to 2012, which is a major earthquake (mainshock) the magnitude of 6.0 - 9.1 SR. To calculate the waiting time distribution forecasting using a third used the software Mathematica for Windows version 8.0. Making the program requires data - input data relating to waiting times of earthquakes in the past to the present. By making this prediction program to predict the timing of the tectonic earthquake in Nias Island.So predictable subsequent tectonic earthquake in Nias island territory will occur on September 4, 2013 when predicted using the Weibull distribution with three parameters, dated April 5, 2013 if the forecast using the Gumbel distribution with two parameters and dated September 4, 2013 when predicted using the method of distribution exponential with a parameter.
PENGGUNAAN GEOLISTRIK RESISTIVITI UNTUK IDENTIFIKASI STRUKTUR BAWAH PERMUKAAN BATUAN ANTARA LAU KETUKEN DAN LAU BEKERAH DI DESA SULKAM KABUPATEN LANGKAT Juliani, Rita; Sembiring, Timbangen; Sitepu, Mester; Motlan, Motlan
SEMIRATA 2015 Prosiding Bidang Fisika
Publisher : SEMIRATA 2015

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Telah dilakukan penggunaan geolistrik resistivitimeter untuk mengidentifikasi struktur bawah permukaan batuan di antara lau Ketuken dan lau Bekerah di desa Sulkam kabupaten Langkat. Pengukuran menggunakan alat geolistrik Automatic Resistivity System (ARES)-G4 v4.7, SN: 0609135 konfigurasi Wenner–Schlumberger dengan panjang lintasan 155 meter dan jarak antara elektroda 5 meter. Data hasil geolistrik ARES diolah menggunakan software Res2DinV untuk memperlihatkan struktur bawah permukaan batuan yang diukur. Hasil interpretasi yang diperoleh dari data geolistrik yang dikaitkan dengan data core hole dan data geologi diperoleh pola penyebaran lapisan bawah permukaan di dominasi oleh batu gamping dengan nilai resistivitas berkisar 500-10.000 Ωm dan lapisan lempung dengan nilai resistivitas 0-100 Ωm, tuffa dengan nilai resistivitas 200-1.000 Ωm serta lapisan tanah dengan resistivitas 250-500 Ωm. Katakunci:geolistrik, resistivitas, batu gamping, lau
Co-Authors Motlan . Nya Daniaty Malau Rita Juliani Timbangen Sembiring