Frictional properties of incoming pelagic sediments at the Japan Trench: implications for large slip at a shallow plate boundary during the 2011 Tohoku earthquake

Earth, Planets and Space

Table 1 Summary of friction experiments on Cores 38 and 40 from DSDP Site 436

Experimental number	Normal stress (MPa)	Slip velocity (m/s)	Displacement (m)	μ _p	μ _ss	D_c(m)	Specific fracture energy (MJ/m²)
Core 38
HVR 3269	1.5	1.31	16.2	0.40	0.09 ± 0.001	0.08 ± 0.005	0.017
HVR 3270	2.0	1.31	15.7	0.45	0.11 ± 0.000	0.03 ± 0.001	0.013
HVR 3271	0.8	1.31	16.1	0.57	0.14 ± 0.001	0.05 ± 0.004	0.008
HVR 3272	1.7	1.31	16.0	0.42	0.11 ± 0.001	0.04 ± 0.003	0.012
HVR 3273	1.0	0.35	15.4	0.42	0.33 ± 0.001	0.01 ± 0.005	0.001
HVR 3274	1.0	0.13	11.8	0.45	0.45 ± 0.001	0.04 ± 0.031	0.001
HVR 3275	1.0	0.013	6.0	-	0.50 ± 0.066	-	-
HVR 3276	1.0	0.0014	5.8	-	0.57 ± 0.036	-	-
HVR 3277	1.0	0.00031	3.2	-	0.52 ± 0.015	-	-
HVR 3278	1.0	1.31	16.2	0.43	0.07 ± 0.001	0.21 ± 0.009	0.039
HVR 3440	1.0	1.31	16.0	0.48	0.10 ± 0.001	0.06 ± 0.003	0.012
Core 40
HVR 3190	1.0	1.31	47.7	0.29	0.07 ± 0.000	0.84 ± 0.022	0.067
HVR 3192	1.5	1.31	16.1	0.17	0.08 ± 0.000	1.07 ± 0.042	0.068
HVR 3193	2.0	1.31	16.7	0.22	0.06 ± 0.000	1.08 ± 0.026	0.121
HVR 3194	1.0	0.13	15.7	0.21	0.15 ± 0.000	-	-
HVR 3195	1.0	0.013	2.4	0.19	0.14 ± 0.000	-	-
HVR 3196	1.0	0.014	5.6	0.11	0.10 ± 0.010	-	-
HVR 3197	1.0	0.35	13.5	0.21	0.10 ± 0.000	-	-
HVR 3199	1.0	0.00025	6.7	0.09	0.09 ± 0.008	-	-
HVR 3200	1.0	1.31	16.2	0.22	0.11 ± 0.000	0.41 ± 0.035	0.017
HVR 3206	0.7	1.31	16.5	0.28	0.07 ± 0.001	0.23 ± 0.019	0.013
HVR 3208	1.7	1.31	16.1	0.22	0.09 ± 0.000	0.73 ± 0.024	0.062
HVR 3265	1.0	1.31	16.2	0.33	0.18 ± 0.000	0.11 ± 0.011	0.006