Prior and Real-Time Estimations of Ground Motions, Tsunamis, and Other Geodynamic Hazards
Takao Kagawa*, and Yusaku Ohta**
*Graduate School of Engineering, Tottori University
4-101 Koyamacho-Minami, Tottori, Tottori 680-8552, Japan
**Graduate School of Science, Tohoku University, Miyagi, Japan
In this research area, methodologies for prior predictions of potential hazards and real-time estimations of progressing hazards caused by earthquakes and volcanic eruptions are proved for disaster mitigation. The studies are based on the latest understanding of earthquake processes, volcanic activities, and the crustal structure. The studies have been conducted through the co-operation of the research fields of disaster prevention engineering and social science, in conjunction with the practical services of on-site works, to effectively provide the people with advance and immediately prior predictions. Predicting hazard potentials with high accuracy is important to the planning of disaster countermeasures. The hazards include ground motions, tsunamis, and land slides due to earthquakes as well as flows of volcanic ash and lava from volcanic activities. Real-time estimation of hazards and simultaneous transmission of the estimated results are also help in the mitigation of secondary hazards that followed the main disaster. Typical examples of the results are presented in this review paper.
-  K. Asano, H. Sekiguchi, T. Iwata, W. Suzuki, S. Aoi, and T. Kunugi, “Source Process of the 2011 Off the Pacific Coast of Tohoku Earthquake,” H. Kawase (Eds.), “Studies on the 2011 Off the Pacific Coast of Tohoku Earthquake, Natural Disaster Science and Mitigation Engineering: DPRI Reports,” Springer, pp. 17-36, 2014.
-  H. Kubo, T. Iwata, K. Asano, and S. Aoi, “Period-dependent seismic radiation for the 2011 Tohoku-oki earthquake estimated by multiple-period-band source modelling,” The 26th General Assembly of International Union of Geodesy and Geophysics (IUGG), S05p-373, 2015.
-  K. Asano and T. Iwata, “Source rupture processes of the foreshock and mainshock in the 2016 Kumamoto earthquake sequence estimated from the kinematic waveform inversion of strong motion data,” Earth, Planets and Space, Vol.68, Article No.147, doi:10.1186/s40623-016-0519-9, 2016.
-  K. Irikura and H. Miyake, “Recipe for Predicting Strong Motion from Crustal Earthquake Scenarios,” Pure and Applied Geophysics, Vol.168, No.1-2, pp. 85-104, doi:10.1007/s00024-010-0150-9, 2010.
-  H. Sekiguchi, T. Iwata, and K. Asano, “Strong Ground Motion Simulation for the 2018 Northern Osaka Prefecture Earthquake (MJ6.1),” Programme and Abstracts of the Seismological Society of Japan, S24-15, 2018 (in Japanese).
-  K. Asano, T. Iwata, and M. Hallo, “Rupture Process of the 2018 Northern Osaka Earthquake (MW5.6), an Earthquake Involving Both Thrust and Strike-slip Faults Near a Junction of Major Active Fault Systems Surrounding the Osaka Basin, Japan,” American Geophysical Union (AGU) 2018 Fall Meeting, S43C-0602, 2018.
-  T. Furumura and B. L. N. Kennett, “Regional distance PL phase in the crustal waveguide - An analog to the teleseismic W phase in the upper-mantle waveguide,” J. of Geophysical Research, Vol.123, Issue 5, pp. 4007-4024, doi:10.1029/2018JB015717, 2018.
-  T. Furumura, T. Maeda, and A. Oba, “Early forecast of long-period ground motions via data assimilation of observed ground motions and wave propagation simulations,” Geophysical Research Letters, Vol.46, Issue 1, pp. 138-147, doi:10.1029/2018GL081163, 2019.
-  M. Chigira, T. Sato, Y. Matsushi, and T. Suzuki, “Landslides induced by the 2016 Kumamoto earthquake and its application to future earthquake-induced landslides,” The 5th Int. Symp. on Mega Earthquake Induced Geo-Disasters and Long Term Effects, pp. 7-8, 2018.
-  C.-Y. Tsou, M. Chigira, D. Higaki, G. Sato, H. Yagi, H. P. Sato, A. Wakai, V. Dangol, S. C. Amatya, and A. Yatagai, “Topographic and geologic controls on landslides induced by the 2015 Gorkha earthquake and its aftershocks: an example from the Trishuli Valley, central Nepal,” Landslides, Vol.15, No.5, pp. 953-965, doi:10.1007/s10346-017-0913-9, 2018.
-  S. Zhao, M. Chigira, and X. Wu, “Buckling deformations at the 2017 Xinmo landslide site and nearby slopes, Maoxian, Sichuan, China,” Engineering Geology, Vol.246, pp. 187-197, doi:10.1016/j.enggeo.2018.09.033, 2018.
-  M. Chigira and T. Suzuki, “Prediction of earthquake-induced landslides of pyroclastic fall deposits,” S. Aversa, L. Cascini, L. Picarelli, and C. Scavia (Eds.), “Landslides and Engineered Slopes, Experience, Theory and Practice,” Associazione Geotecnica Italiana, pp. 93-100, 2016.
-  M. Chigira, “Deep-seated catastrophic landslides induced by large earthquakes along the Nankai and Sagami troughs,” Japan Geoscience Union - American Geophysical Union Joint Meeting 2017, HDS17-05, 2017.
-  N. Ma, G. Wang, T. Kamai, I. Doi, and M. Chigira, “Amplification of seismic response of a large deep-seated landslide in Tokushima, Japan,” Engineering Geology, Vol.249, pp. 218-234, 2019.
-  T. Kagawa, “Enhancements of real time seismic intensity estimation using seismic intensity meters maintained by a local government – Case study on Tottori prefecture –,” Japan Geoscience Union Meeting 2019, SCG59-07, 2019.
-  M. Hoshiba and S. Aoki, “Numerical Shake Prediction for Earthquake Early Warning: Data Assimilation, Real-Time Shake Mapping, and Simulation of Wave Propagation,” Bulletin of Seismological Society of America, Vol.105, No.3, pp. 1324-1338, doi:10.1785/0120140280, 2015.
-  T. Nagai, “Development and improvement of the Japanese coastal wave observation network (NOWPHAS),” J. Jpn. Soc. Civil Eng., Vol.1998, No.609 (VI-41), pp. 1-14, 1998 (in Japanese).
-  Y. Kaneda, K. Kawaguchi, E. Araki, A. Sakuma, H. Matsumoto, T. Nakamura, S. Kamiya, K. Ariyoshi, T. Baba, M. Ohori, and T. Hori, “Dense Ocean floor Network for Earthquakes and Tsunamis (DONET) – Development and Data application for the mega thrust earthquakes around the Nankai Trough –,” Eos Trans. AGU, Vol.90, No.52, Fall Meet. Suppl., Abstract S53A-1453, 2009.
-  National Research Institute for Earth Science and Disaster Resilience (NIED) S-net, doi:10.17598/nied.0007, 2019.
-  A. R. Gusman, Y. Tanioka, B. T. Macinnes, and H. Tsushima, “A methodology for near-field tsunami inundation forecasting: Application to the 2011 Tohoku tsunami,” J. of Geophysical Research: Soild Earth, Vol.119, No.11, pp. 8186-8206, doi:10.1002/2014JB010958, 2014.
-  H. Tsushima, R. Hino, Y. Ohta, T. Iinuma, and S. Miura, “tFISH/RAPiD: Rapid improvement of near-field tsunami forecasting based on offshore tsunami data by incorporating onshore GNSS data,” Geophysical Research Letters, Vol.41, No.10, pp. 3390-3397, doi:10.1002/2014GL059863, 2014.
-  Y. Tanioka, “Tsunami Simulation Method Assimilating Ocean Bottom Pressure Data Near a Tsunami Source Region,” Pure Appl. Geophys., Vol.175, No.2, pp. 721-729, doi:10.1007/s00024-017-1697-5, 2018.
-  Y. Tanioka and A. R. Gusman, “Near-field tsunami inundation forecast method assimilating ocean bottom pressure data: A synthetic test for the 2011 Tohoku-oki tsunami,” Physics of the Earth and Planetary Interior, Vol.283, pp. 82-91, doi:10.1016/j.pepi.2018.08.006, 2018.
-  Y. Tanioka, G. J. A. Miranda, A. R. Gusman, and Y. Fujii, “Method to Determine Appropriate Source Models of Large Earthquakes Including Tsunami Earthquakes for Tsunami Early Warning in Central America,” Pure Applyed Geophysics, Vol.174, No.8, pp. 3237-3248, doi:10.1007/s00024-017-1630-y, 2017.
-  T. Ozaki, “Outline of the 2011 off the Pacific coast of Tohoku Earthquake (MW 9.0),” Earth, Planets and Space, Vol.63, No.7, pp. 827-830, doi:10.5047/eps.2011.06.029, 2011.
-  G. Blewitt, C. Kreemer, W. C. Hammond, H.-P. Plag, S. Stein, and E. Okal, “Rapid determination of earthquake magnitude using GPS for tsunami warning systems,” Geophysical Research Letters, Vol.33, No.11, pp. 6-9, doi:10.1029/2006GL026145, 2006.
-  Y. Ohta, T. Kobayashi, H. Tsushima, S. Miura, R. Hino, T. Takasu, H. Fujimoto, T. Iinuma, K. Tachibana, T. Demachi, T. Sato, M. Ohzono, and N. Umino, “Quasi real-time fault model estimation for near-field tsunami forecasting based on RTK-GPS analysis: Application to the 2011 Tohoku-Oki Earthquake (MW 9.0),” J. of Geophysocal Research Solid Earth, Vol.117, B0231116, doi:10.1029/2011JB008750, 2012.
-  S. Kawamoto, Y. Hiyama, Y. Ohta, and T. Nishimura, “First Result from the GEONET Real-time Analysis System (REGARD): the Case of the 2016 Kumamoto Earthquakes,” Earth, Planets and Space, Vol.68, Article No.190, doi:10.1186/s40623-016-0564-4, 2016.
-  S. Kawamoto, Y. Ohta, Y. Hiyama, M. Todoroki, T. Nishimura, T. Furuya, Y. Sato T. Yahagi, and K. Miyagawa, “REGARD, A new GNSS-based real-time finite fault modeling system on GEONET,” J. of Geophysical Research Solid Earth, Vol.122, No.2, pp. 1324-1349, doi:10.1002/2016JB013485, 2017.
-  Y. Ohta, T. Inoue, S. Koshimura, S. Kawamoto, and R. Hino, “Role of real-time GNSS in near-field tsunami forecasting,” J. Disaster Res., Vol.13, No.3, pp. 453-459, 2018.
-  Y. Tanaka, Y. Ohta, and S. Miyazaki, “Real-time Coseismic Slip Estimation via the GNSS Carrier-Phase to Fault Slip Approach: A Case Study of the 2016 Kumamoto Earthquake,” Geophysical Research Letters, Vol.46, No.3, pp. 1367-1374, doi:10.1029/2018GL080741, 2019.
-  P. Cervelli, P. Segall, K. Johnson, M. Lisowski, and A. Miklius, “Sudden aseismic fault slip on the south flank of Kilauea volcano,” Nature, Vol.415, ArtIcle No.6875, pp. 1014-1018, doi:10.1038/4151014a, 2002.
-  M. Iguchi, H. Nakamichi, H. Tanaka, Y. Ohta, A. Shimizu, and D. Miki, “Integrated Monitoring of Volcanic Ash and Forecasting at Sakurajima Volcano, Japan,” J. Disaster Res., Vol.14, No.5, pp. 798-809, doi:10.20965/jdr.2019.p0798, 2019.
-  Y. Ohta and M. Iguchi, “Advective diffusion of volcanic plume captured by dense GNSS network around Sakurajima volcano: a case study of the Vulcanian eruption on July 24, 2012,” Earth, Planets and Space, Vol.67, No.1, Article No.157, doi:10.1186/s40623-015-0324-x, 2015.
-  M. Iguchi, “Method for Real-Time Evaluation of Discharge Rate of Volcanic Ash – Case Study on Intermittent Eruptions at the Sakurajima Volcano, Japan –,” J. Disaster Res., Vol.11, No.1, pp. 4-11, 2016.
-  H. Tanaka and M. Iguchi, “Numerical Simulations of Volcanic Ash Plume Dispersal for Sakura-Jima Using Real-Time Emission Rate Estimation,” J. Disaster Res., Vol.14, No.1, pp. 160-172, doi:10.20965/jdr.2019.p0160, 2019.