ANALISIS POLARISASI GELOMBANG SEISMIK ERUPSI BLEDUG KUWU MENGGUNAKAN SEISOMETER 3 KOMPONEN; POLARISATION ANALYSIS ON SEISMIC WAVE OF BLEDUG KUWU ERUPTION USING THREE COMPONENTS SEISMOMETER

Nanang Sugianto, Wiwit Suryanto

2014 | Disertasi | PROGRAM STUDI S2 ILMU FISIKA

Micro-seismic monitoring at Bledug Kuwu area using three components seismometer has been measured. The aim of this monitoring is to analyze the internal dynamics of mud eruption in Bledug Kuwu from a certain depth to the surface. Data were collected from the record of three seismometers which were installed simultaneously forming a triangle with the eruption source in the center. The internal dynamics of the mud eruption in Bledug Kuwu was obtained by analyzing the pattern of source motion which is showed by the change of Azimuth, Back-Azimuth, Incidence angle and depth of the source as a function of time. According to the analysis results, the internal dynamics of fluid bubble eruption of Bledug Kuwu can be detected. The internal dynamics eruption of Bledug Kuwu is vertically distributed. It can be identified by the azimuth direction from station to source which is relatively constant and the indication of incident angle shifted as a function of time. The epicenter position is shifted about (20-25)o from the estimated center eruption. The average depth of the hypocenter is about 200 meters from the earth’s surface.

Kata Kunci : Bledug Kuwu, polarization analysis, internal dynamic of mud eruption