Fault Roughness at Seismogenic Depths and Links to Earthquake Behavior

Role of seismogenic depth and background stress on physical 1 limits of earthquake rupture across fault step - overs

11 Earthquakes can rupture geometrically complex fault systems by breaching fault step-overs. 12 Quantifying the likelihood of rupture jump across step-overs is important to evaluate earth13 quake hazard and to understand the interactions between dynamic rupture and fault growth 14 processes. Here we investigate the role of seismogenic depth and background stress on phys15 ical limits of earthq...

Attenuation models (QP and QS) in three dimensions of the southern California crust: Inferred fluid saturation at seismogenic depths

[1] We analyze high dynamic range waveform spectra to determine t* values for both P and S waves from earthquakes in southern California. We invert the t* values for threedimensional (3-D) frequency-independent QP and QS regional models of the crust. The models have 15 km horizontal grid spacing and an average vertical grid spacing of 4 km, down to 22 km depth, and extend from the U.S.-Mexico b...

Fractal behavior of soil water storage at multiple depths

Spatiotemporal behavior of soil water is essential to understand the science of hydrodynamics. Data intensive measurement of surface soil water using remote sensing has established that the spatial variability of soil water can be described using the principle of self-similarity (scaling properties) or fractal theory. This information can be used in determining land management practices provide...

Soaking sugarbeet seeds to improve emergence at three seeding depths and two irrigation treatments

Long-range Earthquake Fault Models

U the physics of complex phenomena such as earthquakes is a formidable challenge. Because we are constrained by our inability to do experiments on earthquake faults, we turn to computers as our earthquake laboratories. Computer simulations of earthquakes help us to test theoretical models and allow us to generate catalogs of synthetic earthquake events. In this column, we discuss several models...