Drilling the seismogenic zone

Upper limit on damage zone thickness controlled by seismogenic depth

Characteristics of chlorites in seismogenic fault zones: the Taiwan Chelungpu Fault Drilling Project (TCDP) core sample

Y. Hashimoto 1 , O. Tadai 2 , M. Tanimizu 3 , W. Tanikawa 3 , T. Hirono 4 , K. Aoike 5 , T. Ishikawa 3 , M. Murayama 6 , W. Soh 3 , S. R. Song 7 , K. Fujimoto 8 , T. Fukuchi 9 , M. Ikehara 6 , H. Ito 4 , H. Kikuta 3 , M. Kinoshita 10 , W. Lin 3 , K. Masuda 11 , T. Matsubara 9 , O. Matsubayashi 12 , T. Mishima 6 , K. Mizoguchi 13 , N. Nakamura 14 , K. Otsuki 14 , M. Sakaguchi 2 , T. Shimamoto 15...

Imaging the Plate Interface in the Cascadia Seismogenic Zone: New Constraints from Offshore Receiver Functions

The Cascadia subduction zone, where the Juan de Fuca (JdF) plate subducts beneath North America, has paleoseismic evidence ofMw ∼9:0 megathrust earthquakes (Nelson et al., 1995; Goldfinger et al., 2003). However, there are virtually no instrumentally recorded thrust-zone earthquakes, hence the location and behavior of the seismogenic zone is known only indirectly. Temperature has been proposed ...

Oxygen profiling of the unsaturated zone using direct push drilling.

A methodology for oxygen profile measurements in the unsaturated zone is developed based on direct push drilling using sampling liners equipped with homemade silicone septa. The oxygen measurement is carried out by puncturing the septum with a commercial retractable optode needle fitted with a fluorescent tip. Metrological characteristics and method validation were carried out under laboratory ...

Seismogenic faulting in the Meruoca granite, NE Brazil, consistent with a local weak fracture zone.

A sequence of earthquakes occurred in 2008 in the Meruoca granitic pluton, located in the northwestern part of the Borborema Province, NE Brazil. A seismological study defined the seismic activity occurring along the seismically-defined Riacho Fundo fault, a 081° striking, 8 km deep structure. The objective of this study was to analyze the correlation between this seismic activity and geologica...