Abstract
Estimates of maximum mean P‐wave attenuation (described by the quality factor Qα) are used to make a two‐layer model of Qα in the period range 0.125–1 s for the northwest Pacific subducting region. A shallow highly attenuating layer (Qα ≈ 150) of only 85 km thickness overlays a less attenuating layer to a depth of 450 km (Qα > 1000). The added bandwidth made available by the use of array data yields key information for testing the validity of textbook models predominantly based on extrapolation from longer period data. We find that seismic attenuation at short periods appears to behave differently to long‐period attenuation. This reversal is represented by a modification to the absorption band model obtained from longer period data.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
