The German Continental Deep Drilling Program (KTB) was designed to study the properties
and processes of the deeper continental crust by means of superdeep borehole. Major …

Seismic measurements take many forms, and appear to have a universal role in the Earth
Sciences. They are the means for most easily and economically interpreting what lies …

For many years, in situ stress in the brittle crust has been measured at relatively shallow
depth and related to the mechanical behavior of the crust as inferred from laboratory studies …

A fluid injection‐induced seismicity experiment was conducted in the German Continental
Deep Drilling Program (KTB) main borehole at 9.1 km depth (in situ temperature of 260° C) …

The granite-and-greenstone terrains that dominate upper crust formed from about 3.6 to
about 2.6 Ga, and record magmatic and tectonic processes very different from those of a …

Apparent stress τa is defined as, where is the average shear stress loading the fault plane to
cause slip and η is the seismic efficiency, defined as Ea/W, where Ea is the energy radiated …

To better understand the mechanisms that control fluid flow and hydraulic conductivity at
significant depth in the brittle crust, we have examined the relationship between fracture …

A fluid injection-induced seismicity experiment was undertaken in the ktb (German
Continental Deep Drilling Program) main borehole at 9 km depth. Several hundred …

Numerous studies have investigated the geodynamic history and lithological composition of
the Proterozoic basement, Caledonian nappes, and Devonian extensional basins and shear …

Recent hydraulic experiments at the KTB site have shown that seismicity induced by long‐
term fluid injection directly into a continental crustal fault remains guided by this fault. The …