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Full-Text Articles in Physical Sciences and Mathematics
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 …
Source Parameters And Time‐Dependent Slip Distributions Of Slow Slip Events On The Cascadia Subduction Zone From 1998 To 2008, D. A. Schmidt, Haiying Gao
Source Parameters And Time‐Dependent Slip Distributions Of Slow Slip Events On The Cascadia Subduction Zone From 1998 To 2008, D. A. Schmidt, Haiying Gao
Haiying Gao
We invert for the time‐dependent slip history of slow slip events on the Cascadia subduction zone using GPS data from 1998 to 2008. The 16 slip transients have sufficient station coverage to solve for the slip distribution on the plate interface. GPS time series are inverted for fault slip using the Extended Network Inversion Filter. Limited station coverage south of Portland (45.5°N latitude) restricts our analysis to events on the northern half of the subduction zone. Slip is resolved at the base of the seismogenic zone and the slip distributions suggest a potential segment boundary near Seattle (47.6°N) that correlates …