Shiro Hirano

Research Interests

Mathematical modeling of earthquake fault mechanics: Dynamic rupture along and crossing with a material interface; Earthquake energy estimation based on inversion analyses; Determination of rupture velocity with a granular layer friction; Unilateral rupture along very long reverse faults; Stress heterogeneity and foreshock-mainshock-aftershock sequences
Seismicity data analysis: Threshold-free matched-filter technique for seismic event detection based on the extreme value theory and information criterion
Laboratory experiments associated with earthquake: Dynamic shear rupture in a photoelastic medium

Antecedents

Assistant professor, Apr. 2015 -- present: Department of Physical Science, College of Science and Engineering, Ritsumeikan University, Japan; Teaching Earth Science/Laboratory Works in Earth Science
Postdoctral fellow, Oct. 2013 -- Mar. 2015: Mega Quake Risk Management Project / Faculty of Engineering, Information and Systems, Tsukuba University, Japan
PhD course, Apr. 2009 -- Sep. 2013: Earthquake Research Institute / Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan; supervised by Teruo Yamashita and Nobuki Kame
Internship, Jul. 2011 -- Aug. 2011: School of Engineering and Applied Science, Harvard University, U.S.; hosted by James R. Rice
Master's course, Apr. 2007 -- Mar. 2009: Earthquake Research Institute / Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan; supervised by Teruo Yamashita
Undergraduate course, Apr. 2003 -- Mar. 2007: Department of Mathematics, Faculty of Science, Tokyo University of Science, Japan; supervised by Keiichi Kato

Publications

Hirano, S., Kawakata, H., and Doi, I. (submitted): A threshold-free matched-filter technique; Tectonophysics
Hirano, S. (accepted): Résumé: Energy estimation of earthquake faulting processes; Singularity and asymptotic behavior of solutions for partial differential equations with conservation law: RIMS Kôkyûroku Bessatsu.
Hirano, S. (accepted): Friction vs. damage: dynamic self-similar crack growth revisited; In: Itou, H. et al. (eds) Mathematical Analysis of Continuum Mechanics and Industrial Applications III. CoMFoS18. Mathematics for Industry, Springer.
Hirano, S. (2019): Modeling of unilateral rupture along very-long reverse faults; J. Geophys. Res., 124, doi:10.1029/2018JB016511.
Okuwaki, R., Kasahara, A., Yagi, Y., Hirano, S. and Fukahata, Y. (2019): Backprojection to image slip; Geophys. J. Int., 216(3) 1529--1537, doi:10.1093/gji/ggy505.; EarthArXiv
Nakayama, M., Kawakata, H., Hirano, S., Doi, I., and Takahashi, N. (2018): Propagation characteristics of elastic waves transmitted through sand soils under dry and saturated conditions; Progress in Acoustic Emission XIX, Jpn. Soc. Non-Destructive Inspection, 163--167.
Tamaribuchi, K., Yagi, Y., Enescu, B. and Hirano, S. (2018): Characteristics of foreshock and aftershock activity inferred from the JMA earthquake catalog improved by automatic processing; Earth Planet Space, 70:90, doi:10.1186/s40623-018-0866-9.
Hirano, S. (2018): Integral representation and its applications in earthquake mechanics: a review; In: van Meurs, P. et al. (eds) Mathematical Analysis of Continuum Mechanics and Industrial Applications II. CoMFoS 2016. Mathematics for Industry, vol 30. Springer, Singapore, doi:10.1007/978-981-10-6283-4_9.
Endo, S., Nakao, A., Hirano, S. and Yagi, Y. (2017): The 2013 Sea of Okhotsk deep earthquake: A complex rupture within the Ringwoodite stability zone; Earth Evol. Sci., 11:23--30.
Hirano, S. and Yagi, Y. (2017): Dependence of seismic and radiated energy on shorter wavelength components; Geophys. J. Int., 209(3) 1585--1592, doi:10.1093/gji/ggx108.
Hirano, S. (2017): Propagation velocity of pulse-like rupture along earthquake faults; In: Itou, H. et al. (eds) Mathematical Analysis of Continuum Mechanics and Industrial Applications. Mathematics for Industry, vol 26. Springer, Singapore, doi:10.1007/978-981-10-2633-1_10.
Hirano, S. and Yamashita, T. (2016): Modeling of interfacial dynamic slip pulses with slip-weakening friction; Bull. Seism. Soc. Am. 106(4) 1628--1636, doi: 10.1785/0120150208.
Hirano, S. and Yamashita, T. (2015): Dynamic anti-plane rupture propagation crossing a material interface: modelling with BIEM; Geophys. J. Int. 200(2) 1220--1233, doi:10.1093/gji/ggu471.
Okuwaki, R., Yagi, Y. and Hirano, S. (2014): Relationship between High-frequency Radiation and Asperity Ruptures, Revealed by Hybrid Back-projection with a Non-planar Fault Model; Scientific Reports, 4:7120, doi:10.1038/srep07120.
Yagi, Y., Okuwaki, R., Enescu, B., Hirano, S., Yamagami, Y., Endo, S. and Komoro, T. (2014): Rupture process of the 2014 Iquique Chile earthquake in relation with the foreshock activity; Geophys. Res. Lett., 41(12) 4201--4206, doi: 10.1002/2014GL060274.
Hirano, S. and Yamashita, T. (2011): Analysis of the static stress field around faults lying along and intersecting a bimaterial interface; Geophys. J. Int. 187(3) 1460--1478, doi:10.1111/j.1365-246X.2011.05202.x.
桑野修, 平野史朗, 藤田哲史, 日下部哲也, 小寺祐貴, 亀伸樹, 中谷正生, 安藤亮輔 (2011): 寒天（アガロースゲル）を用いた断層の動的破壊実験; 日本地震学会ニュースレター Vol.22 No.6, 表紙

International Presentations

Hirano, S.: Aftershocks and the GR law due to a heterogeneous slip model; American Geophysical Union 2018 Fall Meeting, Washington D.C., U.S., December 14, 2018
Nakayama, M., Kawakata, H., Hirano, S., Doi, I., and Takahashi, N.: 24-hours broadband measurements of elastic waves transmitted through sand soils under dry and saturated conditions to investigate differences in propagation characteristics; American Geophysical Union 2018 Fall Meeting, Washington D.C., U.S., December 10, 2018
Nakayama, M., Kawakata, H., Hirano, S., Doi, I., and Takahashi, N.: Propagation characteristics of elastic waves transmitted through sand soils under dry and saturated conditions; 24th International Acoustic Emission Symposium, Sapporo, Japan, November 07, 2018
Hirano, S., Toyomoto, Y., Kawakata, H., and Doi, I.: Application of Extreme Value Theory to a Matched-Filter Analysis; 10th ACES International Workshop, Awaji Island, Japan, September 27, 2018
Hirano, S.: Friction vs. damage: dynamic self-similar crack growth revisited; CoMFoS18:Mathematical Analysis of Continuum Mechanics and Industrial Applications, Kyoto, Japan, June 13, 2018
Hirano, S., Toyomoto, Y., Kawakata, H. and Doi, I.: Objective matched-filter analysis for dertecting small events; International Symposium on Earthquake Forecast / 5th International Workshop on Earthquake Preparation Process, ~Observation, Validation, Modeling, Forecasting~, Chiba, Japan, May 25, 2018
Wakamatsu, S., Kawakata, H. and Hirano, S.: Observed seismic and infrasonic signals around the Hakone volcano -Discussion based on a finite-difference calculation-; American Geophysical Union 2017 Fall Meeting, New Orleans, U.S., December 15, 2017
Hirano, S.: Mathematical modeling and numerical simulation of unilateral dynamic rupture propagation along very-long reverse faults; American Geophysical Union 2017 Fall Meeting, New Orleans, U.S., December 14, 2017
Nakayama, M., Kawakata, H., Hirano, S., Doi, I. and Takahashi, N.: Improvement in transmission experiment of elastic waves through partially saturated porous sand soil; American Geophysical Union 2017 Fall Meeting, New Orleans, U.S., December 14, 2017
Yoneda, N., Kawakata, H., Hirano, S., Yoshimitsu, N. and Takahashi, N.: Extraction of AE events to estimate their b values under a triaxial compressive condition ~Examination using continuous broadband records~; American Geophysical Union 2017 Fall Meeting, New Orleans, U.S., December 14, 2017
Hirano, S.: Unilateral dynamic rupture propagation along earthquake faults; CoMFoS17:Mathematical Analysis of Continuum Mechanics and Industrial Applications, OIST, Japan, September 21, 2017
Hirano, S.: Energy estimation of earthquake faulting based on a wavefield inversion; RIMS workshop on "Singularity and asymptotic behavior of solutions for partial differential equations with conservation law", Kyoto, Japan, June 08, 2017
Hirano, S.: Integral equation for mechanics of earthquakes; RIMS workshop on "Inverse problems for partial differential equations and related areas", Kyoto, Japan, January 26, 2017
Nakayama, M., Kawakata, H., Hirano, S., Doi, I., and Takahashi, N.: Transmission experiment of elastic waves with short wavelengths through a highly porous sand soil during water injection; American Geophysical Union 2016 Fall Meeting, San Francisco, U.S., December 15, 2016
Toyomoto, Y., Kawakata, H., Hirano, S. and Doi, I.: Foreshock search over a long duration using a method of setting appropriate criteria; American Geophysical Union 2016 Fall Meeting, San Francisco, U.S., December 15, 2016
Tsujimura, Y., Kawakata, H., Fukuyama, E., Yamashita, F., Xu, S., Mizoguchi, K, Takizawa, S. and Hirano, S.: Spatio-temporal foreshock activity during stick-slip experiments of large rock samples; American Geophysical Union 2016 Fall Meeting, San Francisco, U.S., December 13, 2016
Hirano, S., Yamashita, T. and Hatano, T.: Behavior of pulse-like rupture with velocity-time-dependent friction from a granular layer model; American Geophysical Union 2016 Fall Meeting, San Francisco, U.S., December 12, 2016
Hirano, S.: Integral representation and its applications of the mechanics of earthquakes; CoMFoS16:Mathematical Analysis of Continuum Mechanics and Industrial Applications, Kyushu University, Japan, October 23, 2016
Hirano, S. and Yamashita, T.: Propagation velocity of pulse-like rupture with a time-weakening friction law; American Geophysical Union 2015 Fall Meeting, San Francisco, U.S., December 18, 2015
Iwata, K., Kawakata, H., Hirano, S., and Doi, I.: Estimation of Seismic Attenuation beneath Tateyama Volcano, Central Japan by Using Peak Delay; American Geophysical Union 2015 Fall Meeting, San Francisco, U.S., December 17, 2015
Imahori, A., Kawakata, H., Hirano, S., Yoshimitsu, N., and Takahashi, N.: Travel Times of Later Phases for Transmitting Waves through a Fracturing Westerly Granite Sample under a Triaxial Compressive Condition; American Geophysical Union 2015 Fall Meeting, San Francisco, U.S., December 16, 2015
Hirano, S.: Propagation velocity of pulse-like rupture along earthquake fault; CoMFoS15:Mathematical Analysis of Continuum Mechanics and Industrial Applications, Kyushu University, Japan, November 16, 2015
Hirano, S. and Yagi, Y.: Dependence of seismic energy on higher wavenumber components; American Geophysical Union 2014 Fall Meeting, San Francisco, U.S., December 19, 2014
Yagi, Y., Okuwaki, R., Enescu, B. and Hirano, S.: Rupture process of the 2014 Iquique Chile earthquake in relation with the foreshock activity; American Geophysical Union 2014 Fall Meeting, San Francisco, U.S., December 17, 2014
Okuwaki, R., Yagi, Y. and Hirano, S.: Relationship between High-frequency Radiation and Asperity Rupture，Revealed by Hybrid Back-projection with Non-planer Fault; Seismological Society of America Annual Meeting, Anchorage, U.S., May 01, 2014
Hirano, S. and Yamashita, T.: BIEM Simulation for Anti-Plane Dynamic Rupture Propagation across a Bimaterial Interface; Seismological Society of America Annual Meeting, Anchorage, U.S., April 30, 2014
Hirano, S.: An integral representation and numerical simulation of dynamic earthquake faulting occurring in a two-layered medium; Conference on Diffusion in Heterogeneous Media and Related Topics, Tokyo, Japan, March 06, 2014
Hirano, S. and Yamashita, T.: Off Fault Stress Distribution around Dynamic Slip Pulse on a Bimaterial Interface; The 7th ACES International Workshop, Otaru, Japan, October 04, 2010
Hirano, S. and Yamashita, T.: Theoretical analysis of static mode-II crack in two-layered medium - interfacial fault and intersecting fault; Workshop -Earthquake Source Dynamics: Data and Data-constrained Numerical Modeling, Smolenice Castle, Slovakia, June 28, 2010
Hirano, S. and Yamashita, T.: Mathematical and numerical analysis of non-planar static mode-II crack in a two-layered medium; American Geophysical Union 2009 Fall meeting, San Francisco, U.S., December 17, 2009
Hirano, S. and Yamashita, T.: Mathematical and numerical analyses of arbitrarily oriented static mode-II crack in a two-layered medium; The 7th General Assembly of Asian Seismological Commission and The 2008 Fall meeting of Seismological Society of Japan, Tsukuba, Japan, November 27, 2008

Grants

Apr. 2018 -- Mar. 2022: SPDE modeling for diversity and heterogeneity of earthquake ruptures; the Grants-in-Aid for Scientific Research(KAKENHI) Program No. 18K13637; Principal Investigator
Apr. 2017 -- Mar. 2021: Mathematical modeling and analysis of discontinuous phenomena in continuum body; the Grants-in-Aid for Scientific Research(KAKENHI) Program No. 17H02857; Co-Investigator

Contributions

Journal Referee: Bulletin of Seismological Society of America; Computers and Mathematics with Applications; European Journal of Environmental and Civil Engineering; Geophysical Journal International; Journal of Geophysical Research: Solid Earth; Journal of Japan Association for Earthquake Engineering

Scientific Societies

Geophysics: American Geophysical Union; Seismological Society of America; Japan Geoscience Union; Seismological Society of Japan
Applied Mathematics: The Japan Society for Industrial and Applied Mathematics (secretary of a research group Mathematical Aspects of Continuum Mechanics)