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Full-Text Articles in Geophysics and Seismology
Validation Of Recent Shear Wave Velocity Models In The United States With Full-Wave Simulation, Haiying Gao, Yang Shen
Validation Of Recent Shear Wave Velocity Models In The United States With Full-Wave Simulation, Haiying Gao, Yang Shen
Haiying Gao
Interpretations of dynamic processes and the thermal and chemical structure of the Earth depend on the accuracy of Earth models. With the growing number of velocity models constructed with different tomographic methods and seismic data sets, there is an increasing need for a systematic way to validate model accuracy and resolution. This study selects five shear wave velocity models in the U.S. and simulates full wave propagation within the 3-D structures. Surface-wave signals extracted from ambient seismic noise and regional earthquakes are compared with synthetic waveforms at multiple-frequency bands. Phase delays and cross-correlation coefficients between observed and synthetic waveforms allow …
Scaling Relationships Of Source Parameters For Slow Slip Events, Haiying Gao, David A. Schmidt, Ray J. Weldon Ii
Scaling Relationships Of Source Parameters For Slow Slip Events, Haiying Gao, David A. Schmidt, Ray J. Weldon Ii
Haiying Gao
To better understand the physical mechanisms of slow slip events (SSEs) detected worldwide, we explore the scaling relationships of various source parameters and compare them with similar scaling laws for earthquakes. These scaling relationships highlight differences and similarities between slow slip events and earthquakes and hold implications for the degree of heterogeneity and fault-healing characteristics. That static drop remains constant for different-sized events as is observed for earthquakes. However, the static stress drop of slow slop events is within a range of 0.01-1.0 MPa, 1-2 orders of magnitiude lower than that found for earthquakes, which could be related to the …