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All Journal Jurnal Matematika & Sains
Gunawan Handayani
Laboratorium Fisika Bumi, Departemen Fisika ITB, Jl. Ganesa 10 Bandung 40132
Mathematics

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A Short Note on : Basic Behavior of the Mount Gamalamas Eruption Lilik Hendrajaya; Surono Surono; Gunawan Handayani
Jurnal Matematika & Sains Vol 1, No 2 (1996)
Publisher : Institut Teknologi Bandung

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Abstract

Hypothesis that the tectonic force release through earthquake will trigger eruption of near by volcano when its magma pocket is full of magma, is put forward. It is mechanically reasonable due to the fact that both magma and the pocket are inside the earth crust which suffers compression stress resulted from the pushing force of oceanic crust in the subduction zone. Observation is conducted at Mount Gamalama in the island of Ternate west of the Halmahera Island, North Molluca. It is expected to have strong pushing force condition. The result shows that the triggering phenomenon is present. The other important results are the understanding of process to produce repeated volcanic eruptions and the knowledge of eruption mechanism.
Aplikasi Metode Geolistrik Untuk Alat Monitoring Rembesan Limbah (Penelitian Model Fisik di Laboratorium) Ngadimin Ngadimin; Gunawan Handayani
Jurnal Matematika & Sains Vol 6, No 1 (2001)
Publisher : Institut Teknologi Bandung

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Abstract

Geoelectrical method utilizes resistivity variation by measuring potential difference due to electrical current which is injected into the ground. The method can be imployed to characterize geological structure of the subsurface, to locate water reservoir, to monitor groundwater pollution and to explore geothermal reservoir. In this study, a laboratory physical model was used along with the geoelectric method as a means to monitor the pollutant transport in the sand of the model. The geoelectric method employed Wenner-Schlumberger configuration with electrode spacing of 5 cm.The result showed that the pollutant transport can be detected from the electrical resistivity variation. The addition conductive pollutant into the sand of the model caused the resistivity of the sand decreased, because the applied pollutant was conductive. After monitoring using five times measurement with pollutant interval application of 600 ml, the restivity measurement showed that the pollutant spreaded progressively at every measurement.
Co-Authors Lilik Hendrajaya Ngadimin Ngadimin Surono Surono