Vico Luthfi Ipmawan, Kirbani Sri Brotopuspito, Hetty Triastuty
Raung is a basaltic-andesitic volcano with strombolian-type emptive activity located in East Java Province, Indonesia. The seismic activity of this volcano increased on 1 lrfa November 2014 which was dominated by tremors. Due to the difficulty to distinguish the onset of body waves of tremor waveform, polarization and semblance methods were proposed and applied to locate the tremor source. The tremors recorded during November to December 2014 were analyzed. The results showed that the back-azimuth values obtained by the polarization method were around N 288°-324° E in accordance with the direction of Raung summit, while the incidence angle ranged around N 81°-89.3° E. The semblance method was performed on 2 x 2 km area around the summit. The result of the tremor source showed the distribution of epicentre extending N52° E to the northeast direction about ±2.1 km away from the Raung summit. © IJOG-2020.
Departement of Physics, Institut Teknologi Sumatera Jln, Terusan Ryacudu Way Hui, Lampung, Indonesia; Departement of Physics, Universitas Gadjah Mada Jln, Sekip Utara Bulaksumur, Yogyakarta, Indonesia; Centre for Volcanology and Geological Hazard Mitigation, Geological Agency Jln, Diponegoro No. 57, Bandung, Indonesia
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