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All Journal At-Taradhi: Jurnal Studi Ekonomi Widyariset Badamai Law Journal Al-Amwal : Jurnal Ekonomi dan Perbankan Syari\'ah Al-Madrasah: Jurnal Ilmiah Pendidikan Madrasah Ibtidaiyah Widyariset Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences
Mahmud Yusuf
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Journal : Widyariset

 1 
COMPARISON OF RAYLEIGH WAVE CHARACTERISTICS ON SUPERCONDUCTING GRAVIMETER AND SESIMOMETER LHZ RECORDINGS MARISKA NATALIA RANDE; Mahmud Yusuf; Alexander F. T Parera
Widyariset Vol 5, No 1 (2019): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.5.1.2019.11-20

Abstract

The vibrations of an earthquake can be properly recorded by the gravimeter. As a Gravimeter, Superconducting Gravimeter (SG) has a very high accuracy; slightly different with general gravimeter. Rayleigh wave is the wave with the largest amplitude in earthquake, so it will be clear on SG tape.  In this research, we use certain superconducting gravimeter (SG) and Seismometer LHZ, spread over several locations around the world; just to know more about Mw > 6 earthquake. Tidal value reduction were applied on SG’s recording in order  to get true gravity value. Then we did time-integral to get velocity and displacement. By using spectrogram function, we can display frequency of SG and LHZ. The amplitude of the Rayleigh wave recorded on the SG is smaller than that recorded on the LHZ and has signal correlation > 7.0. In any case of Rayleigh Global waves, SG is able to record clearly the phase of Rayleigh wave to R7 phase. While LHZ only records up to the R5 phase. The spectrograph analysis reinforces the differences in the viewing screens of SG and LHZ Rayleigh Global waves in the frequency domain, R7 recorded on SG has a frequency range of 0.002 Hz to 0.006 Hz. Based on the results of Rayleigh wave analysis on the SG record and its comparison with the LHZ record it can be concluded that SG has a high level of sensitivity and stable when recording Rayleigh waves.
Co-Authors Alexander F. T Parera Hendera Hadi Herry Fibriadi Imro Atut Toyyibah MARISKA NATALIA RANDE Muhammad Sodiki Parman Komarudin