Characterization of Tsunamigenic Earthquake in Java Region Based on Seismic Wave Calculation
Published in: http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4868766
Sugeng Pribadi1, Afnimar2, Nanang T. Puspito2 and Gunawan Ibrahim2
Abstract.
This study is to characterize the source mechanism of tsunamigenic earthquake based on seismic wave
calculation. The source parameter used are the ratio (Θ) between the radiated seismic energy (E) and seismic moment (Mo),moment magnitude (MW), rupture duration (To) and focal mechanism. These determine the types of tsunamigenic earthquake and tsunami earthquake. We calculate the formula using the teleseismic wave signal processing with the initial phase of P wave with bandpass filter 0.001 Hz to 5 Hz. The amount of station is 84 broadband seismometer with far distance of 30° to 90°. The 2 June 1994 Banyuwangi earthquake with MW=7.8 and the 17 July 2006 Pangandaran earthquake with MW=7.7 include the criteria as a tsunami earthquake which distributed about ratio Θ=-6.1, long rupture duration To>100 s and high tsunami H>7 m. The 2 September 2009 Tasikmalaya earthquake with MW=7.2, Θ=-5.1 and To=27 s which characterized as a small tsunamigenic earthquake.
Keywords: Characterization, earthquake, tsunami, seismic energy, moment seismic.
PACS: 93.30.Nk
Sugeng Pribadi1, Afnimar2, Nanang T. Puspito2 and Gunawan Ibrahim2
Abstract.
This study is to characterize the source mechanism of tsunamigenic earthquake based on seismic wave
calculation. The source parameter used are the ratio (Θ) between the radiated seismic energy (E) and seismic moment (Mo),moment magnitude (MW), rupture duration (To) and focal mechanism. These determine the types of tsunamigenic earthquake and tsunami earthquake. We calculate the formula using the teleseismic wave signal processing with the initial phase of P wave with bandpass filter 0.001 Hz to 5 Hz. The amount of station is 84 broadband seismometer with far distance of 30° to 90°. The 2 June 1994 Banyuwangi earthquake with MW=7.8 and the 17 July 2006 Pangandaran earthquake with MW=7.7 include the criteria as a tsunami earthquake which distributed about ratio Θ=-6.1, long rupture duration To>100 s and high tsunami H>7 m. The 2 September 2009 Tasikmalaya earthquake with MW=7.2, Θ=-5.1 and To=27 s which characterized as a small tsunamigenic earthquake.
Keywords: Characterization, earthquake, tsunami, seismic energy, moment seismic.
PACS: 93.30.Nk
Figure 4. Focal mechanism of Global CMT (red nodal) and
W phase (blue nodal). Line A and B are cross sections.
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