A new NSF grant: As my NSF Career project entitled "Career: Numerical investigation of controls on megathrust earthquakes along the Japan trench subduction zone" ends on July 31, 2020, we recently received a new NSF grant entitled "Collaborative Research: Modeling fault ruptures along bends and stepovers", which starts on July 1, 2020. This new project is a collaboration between the long-term fault tectonic community and the dynamic rupture community to improve our understanding of multi-fault ruptures that impose significant challenges for seismic hazard analysis and reduction.
Another new paper accepted by BSSA recently: A peer-reviewed paper, entitled "Three-dimensional finite element modeling of dynamic rupture and aseismic slip over earthquake cycles on geometrically complex faults", by Luo, B., B. Duan, and D. Liu, was accepted on July 14, 2020 for publication in BSSA. This paper presents our second dynamic earthquake simulator, which is entirely based on our dynamic FEM code EQdyna. One key ingredient is to apply a dynamic relaxation (DR) technique to EQdyna to simulate the quasi-static processes, including nucleation, postseismic and inter seismic processes. Our first dynamic earthquake simulator EQsimu (published a little earlier, Liu et al.,GJI, 2020) integrates EQdyna with a static FEM solver EQquasi for earthquake cycle simulation with dynamic rupture.
A new paper accepted by BSSA recently: Our paper on induced seismicity, entitled "Exploring physical links between fluid injection and nearby earthquakes - The 2012 M4.8 Timpson (TX) case study", by Szafranski, D. and B. Duan, was accepted on July 2, 2020 for publication in BSSA. In this paper, we integrate a fluid flow model with our dynamic rupture models to build direct links between fluid injection and nearby earthquakes, going beyond commonly-used failure potential analyses in induced seismicity studies.
Current Research Topics:
Developing dynamic earthquake simulators for complex fault systems;
Investigating various slip behaviors and their interactions along subduction zones;
Multicycle dynamics of geometrically complex faults;
Static and dynamic stress inversions of geodetic and seismic data;
Mechanical analyses of fluid-injection induced seismicity & microseismicity;
Observation-constrained dynamic models of the San Andreas fault and the Altyn Tagh Fault;
Physics-based strong ground motion prediction;
Finite element methods and parallel computing.
Selected Refereed Journal Articles:
Liu, D., and B. Duan (2020), EQsimu: A 3D finite element dynamic earthquake simulator for multi cycle dynamics of geometrically complex faults governed by rate- and state-dependent friction, Geophys. J. Int., , 220, 598-609, doi:10.1093/gji/ggz475.
Duan, B., Z. Liu, and A. J. Elliott (2019), Multicycle dynamics of the Aksay Bend along the Altyn Tagh Fault in Northwest China, Part 2: The realistically complex fault geometry, Tectonics , 38, https:/doi.org/10.1029/2018TC005196.
He, Z., and B. Duan (2019), Dynamic modeling of bedding -pane slip during hydraulic fracturing, Geophysics , 84(3), doi:10.1190/GEO2018-0170.1.
Luo, B., and B. Duan (2018), Dynamics of non-planar thrust faults governed by various friction laws, J. Geophys. Res. Solid Earth , 123, https://doi.org/10.1029/2017JB015320
Liu, D., and B. Duan (2018), Scenario earthquake and ground motion simulations in North China: Effects of heterogeneous fault stress and 3-D basin structure, Bull. Seismol. Soc. Am. , 108(4), 2148-2169, doing:10.1785/0120170374
Duan, B., D. Liu, and A. Yin (2017), Seismic shaking in the North China Basin expected from ruptures of a possible seismic gap, Geophys. Res. Lett. , 44, dog:10.1002/2017GL072638.
Duan, B. (2016), Spontaneous rupture on natural fractures and seismic radiation during hydraulic fracturing treatments, Geophys. Res. Lett. , 43, 7451-7458, dog:10.1002/2016GL069083.
Payne*, R. M., and B. Duan (2015), Influence of initial stress and rupture initiation parameters on forbidden zone rupture propagation, Geophys. J. Int. , 201 (1), 70-77, doing:10.1039/gji/ggv004.
Liu*, Z., and B. Duan (2014), Dynamics of parallel strike-slip faults with pore fluid pressure change and off-fault damage, Bull. Seismol. Soc. Am. , 104 (2),790-792, doi:10.1785/0120130112.
Kang*, J., and B. Duan (2014), Inelastic response of compliant fault zones to nearby earthquaks in three dimensions, Tectonophysics , 612-613: 56-62, doi:10.1016/j.tecton.2013.11.033.
Duan, B. (2012), Dynamic rupture of the 2011 Mw 9.0 Tohoku-Oki earthquake: Roles of a possible subducting seamount, J. Geophys. Res., 117, B05311, doi:10.1029/2011JB009124.
Duan, B., J. Kang*, and Y. Li (2011), Deformation of compliant fault zones induced by nearby earthquakes: Theoretical investigation in two dimensions, J. Geophys. Res. , 116, B03307, doi:10.1029/2010JB007826.
Wu, X., B. Duan , and V. Taylor (2011), Parallel simulations of dynamic earthquake rupture along geometrically complex faults on CMP systems, J. Algorithm and Computational Technology , 5 (2), 313-340.
Harris, R. A., M. Barall, D. J. Andrews, B. Duan , S. Ma, E. M. Dunham, A. -A. Gabriel, Y. Kaneko, Y. Kase, B. T. Aagaard, D. D. Oglesby, J. -P. Ampuero, T. C. Hanks, and N. Abrahamson (2011), Verifying a computational method for predicting extreme ground motion, Seismol. Res. Lett., Vol. 82, No. 5, 638-644, doi:10.1785/gssrl.85.5.638.
Duan, B., and S. M. Day (2010), Sensitivity Study of Physical Limits on Ground Motion at Yucca Mountain, Bull. Seismol. Soc. Am., 100 (6), 2996-3019, doi:10.1785/0120090372. (PDF)
-Duan, B. (2010), Role of Initial Stress Rotations in Rupture Dynamics and Ground Motion:
A Case Study with Implications for the Wenchuan Earthquake, J. Geophys. Res., 115, B05301, doi:10.1029/2009JB006750.
Duan, B., and S. M. Day (2008), Inelastic strain distribution and seismic radiation from rupture of a fault kink,
J. Geophys. Res., 113, B12311, doi:10.1029/2008JB005847. (PDF)
Duan, B. (2008), Asymmetric off-fault damage generated by bilateral ruptures along a bimaterial interface, Geophys. Res. Lett., 35, L14306, doi:10.1029/2008GL034797. (PDF)
Duan, B.,and D. D. Oglesby (2007), Nonuniform prestress from prior earthquakes
and the effect on dynamics of branched fault systems, J. Geophys. Res., 112, B05308, doi:10.1029/2006JB004443. (PDF)
Duan, B.,and D. D. Oglesby (2006), Heterogeneous fault stresses from previous earthquakes
and the effect on dynamics of parallel strike-slip faults, J. Geophys. Res., 111, B05309, doi:10.1029/2005JB004138. (PDF)
Duan, B.,and D. D. Oglesby (2005), Multicycle dynamics of nonplanar strike-slip faults
, J. Geophys. Res., 110, B03304, doi:10.1029/2004JB003298. (PDF)
Duan, B.,and D. D. Oglesby (2005), The dynamics of thrust and normal faults over multiple
earthquake cycles: Effects of dipping fault geometry, Bull. Seismol. Soc. Am., 95(5), pp.1623-1636, doi:10.1785/0120040234. (PDF)
Xu, S., B. Duan, and D. Zhang (2000). Selection of the wavenumbers k using an optimization method for the inverse Fourier transform in 2.5D electrical modeling, Geophysical Prospecting, 48(5), 789-796.