FN Archimer Export Format
PT J
TI Tsunamigenic earthquake simulations using experimentally derived friction laws
BT 
AF MURPHY, Shane
   DI TORO, G.
   ROMANO, F.
   SCALA, A.
   LORITO, S.
   SPAGNUOLO, E.
   ARETUSINI, S.
   FESTA, G.
   PIATANESI, A.
   NIELSEN, S.
AS 1:1,2;2:3,4;3:1;4:1;5:1;6:1;7:3;8:5;9:1;10:6;
FF 1:PDG-REM-GM-LAD;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Ist Nazl Geofis & Vulcanol, Rome, Italy.
   IFREMER, Plouzane, France.
   Univ Manchester, Manchester, Lancs, England.
   Univ Padua, Padua, Italy.
   Univ Naples Federico II, Naples, Italy.
   Univ Durham, Durham, England.
C2 INGV, ITALY
   IFREMER, FRANCE
   UNIV MANCHESTER, UK
   UNIV PADUA, ITALY
   UNIV NAPLES FEDERICO II, ITALY
   UNIV DURHAM, UK
SI BREST
SE PDG-REM-GM-LAD
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 4.637
TC 23
UR https://archimer.ifremer.fr/doc/00425/53625/54546.pdf
LA English
DT Article
DE ;subduction zone;megathrust;dynamic rupture;rock physics experiments;tsunami earthquake
AB Seismological, tsunami and geodetic observations have shown that subduction zones are complex systems where the properties of earthquake rupture vary with depth as a result of different pre-stress and frictional conditions. A wealth of earthquakes of different sizes and different source features (e.g. rupture duration) can be generated in subduction zones, including tsunami earthquakes, some of which can produce extreme tsunamigenic events. Here, we offer a geological perspective principally accounting for depth-dependent frictional conditions, while adopting a simplified distribution of on-fault tectonic pre-stress. We combine a lithology-controlled, depth-dependent experimental friction law with 2D elastodynamic rupture simulations for a Tohoku-like subduction zone cross-section. Subduction zone fault rocks are dominantly incohesive and clay-rich near the surface, transitioning to cohesive and more crystalline at depth. By randomly shifting along fault dip the location of the high shear stress regions (“asperities”), moderate to great thrust earthquakes and tsunami earthquakes are produced that are quite consistent with seismological, geodetic, and tsunami observations. As an effect of depth-dependent friction in our model, slip is confined to the high stress asperity at depth; near the surface rupture is impeded by the rock-clay transition constraining slip to the clay-rich layer. However, when the high stress asperity is located in the clay-to-crystalline rock transition, great thrust earthquakes can be generated similar to the Mw 9 Tohoku (2011) earthquake. 
PY 2018
PD MAR
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier Science Bv
VL 486
UT 000427102700015
BP 155
EP 165
DI 10.1016/j.epsl.2018.01.011
ID 53625
ER

EF