PPT-Velocity and Attenuation in the

Eastern Bay Area and the Delta Donna EberhartPhillips UC Davis USGS Delta workshop 10 Sept 2015 Regional threedimensional seismic velocity model of the crust and uppermost mantle of northern . Douglas Wiens. Department of Earth & Planetary Sciences. Washington University in Saint Louis. Gung & . Romanowicz. . [2004]. Pozgay. , Wiens, et al. . [2009]. Outline . What is seismic attenuation?. Seismic velocities – P & S. Relationship to elastic moduli. Seismic anisotropy. . -- directional variation in seismic velocity. Seismic Attenuation – 1/. Q. p. & 1/Q. s. . -- What is seismic attenuation?. Wave - Prop agation Velocity, Tsunami Speed, - Attenuation Factors H.V.P. Truong Research Engineer, Westminster Ca 92683, USA SUMMARY : Wave - propagation velocity increases with the increase in b Continental cratons - cold, rigid material. Spreading centers & mountains - warm mantle. P. ,. S, and Q. Tomography - Tonga Arc. Velocity tomography shows anomalies relative to average model [. Conder and Wiens. Continental cratons - cold, rigid material. Spreading centers & mountains - warm mantle. P. ,. S, and Q. Tomography - Tonga Arc. Velocity tomography shows anomalies relative to average model [. Conder. Stack before free surface multiple removal. Multiple attenuation. Free surface multiple attenuation. Stack after free surface multiple removal. Multiple attenuation. Internal multiple attenuation results . Arthur B. . Weglein. . M-OSRP/UH. Monday, September 23, 2013. Recent Advances and the Road Ahead. (1) Recent progress. (2) current outstanding challenges. (3) a proposed road ahead with the potential to address these challenges. open issues. Arthur B. . Weglein. . M-OSRP/UH. Monday, September 23, 2013. Recent Advances and the Road Ahead. (1) Recent progress. (2) current outstanding challenges. (3) a proposed road ahead with the potential to address these challenges. Mark C. Green. Judith C. Chow. Xiaoliang Wang. John G. Watson. Desert Research Institute, Reno, NV. Antony Chen. University of Nevada, Las Vegas. Presented at IMPROVE annual meeting. Petaluma, CA. October 22, 2019. Jason Bini. 1,2. , Jesus Mateo. 1,3. , Josef Machac. 4. , . Jagat. Narula. 5. , . Valentin. Fuster. 3,5. , . Zahi. Fayad. 1,5,6. , David Izquierdo-Garcia. 1. 1 Translational and Molecular Imaging Institute, Mount Sinai School of Medicine, New York, NY, USA. Shielding Materials Daniel R. McAlister , Ph.D. PG Research Foundation, Inc. 1955 University Lane Lisle, IL 60532, USA Revision 6 . 1 June 18 , 201 8 Introduction Attenuation or s hielding of gamma r Norihiro. Matsuda. 1. , Yosuke Iwamoto. 1. , . Tatsuhiko. Sato. 1. , . Shintaro. Hashimoto. 1. , . Tatsuhiko. Ogawa. 1. , Takuya Furuta. 1. , Shinichiro Abe. 1. , Takeshi Kai. 1. , . Ryuji . Hosoyamada. Yu Chen, . Zhaoyun. . Zong. and . Hejun. Zhu. Comparison between BISQ and BISSQ model. 2. BISQ model. BISSQ model. Fluid pressure in the BISSQ model. 3. The average of the fluid pressure. BISSQ model. Unit I: Physics of Nuclear Medicine. Lecture 6 Objectives. (Adapted from your Textbook). Write the general form of the attenuation equation for gamma photons.. Calculate the reduction of gamma radiation using the general attenuation equation..