Effects of water domains on seismic wavefields: A simulation case study at Taal volcano, Philippines

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• 作者：Yuta Maeda ; Hiroyuki Kumagai
• 关键词：Volcano seismology ; moment tensor inversion ; finite ; difference method ; Taal volcano
• 刊名：Earth, Planets and Space
• 出版年：2013
• 出版时间：February 2013
• 年：2013
• 卷：65
• 期：2
• 页码：85-96
• 全文大小：1630KB
• 参考文献：Auger, E., L. D鈥橝uria, M. Martini, B. Chouet, and P. Dawson, Real-time monitoring and massive inversion of source parameters of very long period seismic signals: An application to Stromboli Volcano, Italy, Geophys. Res. Lett., 33, L04301, doi:10.鈥?029/鈥?005GL024703 , 2006.
  Chew, W. C. and Q. H. Liu, Perfectly matched layers for elastodynamics: a new absorbing boundary condition, J. Comput. Acoust., 4, 341鈥?59, 1996.CrossRef
  Chouet, B., P. Dawson, T. Ohminato, M. Martini, G. Saccorotti, F. Giudicepietro, G. De Luca, G. Milana, and R. Scarpa, Source mechanisms of explosions at Stromboli Volcano, Italy, determined from moment-tensor inversions of very-long-period data, J. Geophys. Res., 108, 2019, doi:10.鈥?029/鈥?002JB001919 , 2003.CrossRef
  Delmelle, P., M. Kusakabe, A. Bernard, T. Fischer, S. de Brouwer, and E. del Mundo, Geochemical and isotopic evidence for seawater contamination of the hydrothermal system of Taal Volcano, Luzon, the Philippines, Bull. Volcanol., 59, 562鈥?76, 1998.CrossRef
  Festa, G. and S. Nielsen, PML absorbing boundaries, Bull. Seismol Soc Am., 93, 891鈥?03, doi:10.鈥?785/鈥?120020098 , 2003.CrossRef
  Galgana, G., M. Hamburger, R. McCaffrey, E. Corpuz, and Q. Chen, Analysis of crustal deformation in Luzon, Philippines using geodetic observations and earthquake focal mechanisms, Tectonophysics, 432, 63鈥?7, doi:10.鈥?016/鈥媕.鈥媡ecto.鈥?006.鈥?2.鈥?01 , 2007.CrossRef
  Gardner, G. H., L. W. Gardner, and A. R. Gregory, Formation velocity and density鈥擳he diagnostic basics for stratigraphic traps, Geophysics, 39, 770鈥?80, doi:10.鈥?190/鈥?.鈥?440465 , 1974.CrossRef
  Hatayama, K., Theoretical evaluation of effects of sea on seismic ground motion, in Proceedings of the 13th World Conference on Earthquake Engineering, Vancouver, Canada, 2004, paper 3229, 2004.
  Hidayat, D., B. Chouet, B. Voight, P. Dawson, and A. Ratdomopurbo, Source mechanism of very-long-period signals accompanying dome growth activity at Merapi volcano, Indonesia, Geophys Res Lett., 29, 2118, doi:10.鈥?029/鈥?002GL015013 , 2002.CrossRef
  Kobayashi, T., T. Ohminato, Y. Ida, and E. Fujita, Very long period seismic signals observed before the caldera formation with the 2000 Miyake-jima volcanic activity, Japan, J Geophys Res., 114, B02211, doi:10.鈥?029/鈥?007JB005557 , 2009.
  Ku, Y.-P., C.-H. Chen, S.-R. Song, Y. Iizuka, and J.-S. Shen, A 2 Ma record of explosive volcanism in southwestern Luzon: Implications for the timing of subducted slab steepening, Geochem. Geophys. Geosyst., 10, Q06017, doi:10.鈥?029/鈥?009GC002486 , 2009.CrossRef
  Kumagai, H., T. Ohminato, M. Nakano, M. Ooi, A. Kubo, H. Inoue, and J. Oikawa, Very-long-period seismic signals and caldera formation at Miyake Island, Japan, Science, 293, 687鈥?90, doi:10.鈥?126/鈥媠cience.鈥?062136 , 2001.CrossRef
  Kumagai, H., K. Miyakawa, H. Negishi, H. Inoue, K. Obara, and D. Suetsugu, Magmatic dike resonances inferred from very-long-period seismic signals, Science, 299, 2058鈥?061, doi:10.鈥?126/鈥媠cience.鈥?081195 , 2003.CrossRef
  Legrand, D., S. Kaneshima, and H. Kawakatsu, Moment tensor analysis of near-field broadband waveforms observed at Aso Volcano, Japan, J. Volcanol. Geotherm., Res., 101, 155鈥?69, 2000.CrossRef
  Maeda, Y. and M. Takeo, Very-long-period pulses at Asama volcano, central Japan, inferred from dense seismic observations, Geophys. J. Int., 185, 265鈥?82, doi:10.鈥?111/鈥媕.鈥?365-246X.鈥?011.鈥?4938.鈥媥 , 2011.CrossRef
  Maeda, Y., M. Takeo, and T. Ohminato, A waveform inversion including tilt: method and simple tests, Geophys. J. Int., 184, 907鈥?18, doi:10.鈥?111/鈥媕.鈥?365-246X.鈥?010.鈥?4892.鈥媥 , 2011.CrossRef
  Nakamura, T., H. Takenaka, T. Okamoto, and Y. Kaneda, A study of the finite difference solution for 3D seismic wavefields near a fluid-solid interface, J. Seismol. Soc. Jpn., 63, 189鈥?96, 2011.
  Nakano, M. and H. Kumagai, Waveform inversion of volcano-seismic signals assuming possible source geometries, Geophys. Res. Lett., 32, L12302, doi:10.鈥?029/鈥?005GL022666 , 2005.CrossRef
  Nakano, M., H. Kumagai, and B. A. Chouet, Source mechanism of long-period events at Kusatsu-Shirane Volcano, Japan, inferred from waveform inversion of the effective excitation functions, J. Volcanol. Geotherm. Res., 122, 149鈥?64, 2003.CrossRef
  Ohminato, T., Characteristics and source modeling of broadband seismic signals associated with the hydrothermal system at Satsuma-Iwojima volcano, Japan, J. Volcanol. Geotherm. Res., 158, 467鈥?90, doi:10.鈥?016/鈥媕.鈥媕volgeores.鈥?006.鈥?8.鈥?04 , 2006.CrossRef
  Ohminato, T. and B. A. Chouet, A free-surface boundary condition for including 3D topography in the finite-difference method, Bull. Seismol. Soc. Am, 87, 494鈥?15, 1997.
  Ohminato, T., B. A. Chouet, P. Dawson, and S. Kedar, Waveform inversion of very long period impulsive signals associated with magmatic injection beneath Kilauea Volcano, Hawaii, J. Geophys. Res., 103, 23839鈥?3862, 1998.CrossRef
  Okamoto, T. and H. Takenaka, Fluid-solid boundary implementation in the velocity-stress finite-difference method, J. Seismol. Soc. Jpn, 57, 355鈥?64, 2005.
  Petukhin, A., T. Iwata, and T. Kagawa, Study on the effect of the oceanic water layer on strong ground motion simulations, Earth Planets Space, 62, 621鈥?30, 2010.CrossRef
  Takeo, M., Near-field synthetic seismograms taking into account the effects of anelasticity鈥擳he effects of anelastic attenuation on seismograms caused by a sedimentary layer, Pap. Meteorol. Geophys., 36, 245鈥?57, 1985.CrossRef
  Yamamoto, M., H. Kawakatsu, K. Yomogida, and J. Koyama, Long-period (12 sec) volcanic tremor observed at Usu 2000 eruption: Seismological detection of a deep magma plumbing system, Geophys. Res. Lett., 29, 1329鈥?332, doi:10.鈥?029/鈥?001GL013996 , 2002.CrossRef
  Zlotnicki, J., Y. Sasai, J. P. Toutain, E. U. Villacorte, A. Bernard, J. P. Sabit, J. M. Gordon Jr, E. G. Corpuz, M. Harada, J. T. Punongbayan, H. Hase, and T. Nagao, Combined electromagnetic, geochemical and thermal surveys of Taal volcano (Philippines) during the period 2005-2006, Bull. Volcanol, 71, 29鈥?7, doi:10.鈥?007/鈥媠00445-008-0205-2 , 2009.CrossRef
  
• 作者单位：Yuta Maeda (1)
  Hiroyuki Kumagai (1)
  
  1. National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba, Ibaraki, 305-0006, Japan
  
• 刊物类别：Earth Sciences, general; Geology; Geophysics/Geodesy;
• 刊物主题：Earth Sciences, general; Geology; Geophysics/Geodesy;
• 出版者：Springer Berlin Heidelberg
• ISSN：1880-5981

文摘

We examined the effects of water domains on seismic wavefields at the Taal volcano, Philippines, where there is a summit crater lake on an active volcanic island surrounded by a caldera lake. We conducted forward waveform simulation and synthetic waveform inversion using the 3D finite-difference method for various models with and without the water lakes. Our study demonstrated the existence of both near-and far-field effects of the water domains. The near-field effect is related to source excitation affected by a water domain, and the far-field effect is caused by dispersion of Rayleigh waves propagating through a water domain. Our study also showed that the replacement of water by a vacuum rather than by a solid medium provides a better approximation of a water domain. A water domain has considerable effect on seismic waveforms and must be properly treated when the waveform period is shorter than 2 s, even if recording stations lie in the near field. If the waveform period is longer than 5 s, a water domain has a minor effect on seismic waveforms and may be replaced by a vacuum. Key words Volcano seismology moment tensor inversion finite-difference method Taal volcano