De Bremaecker, Jean-Claude2016-04-222016-04-221963Wu, Chang Sheng. "Azimuthal variation in Pn velocity around the GNOME explosion." (1963) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/89858">https://hdl.handle.net/1911/89858</a>.https://hdl.handle.net/1911/89858The stations which recorded the GNOME explosion in the continental United States can be arranged into 8 more or less linear profiles centered on ground zero. The P wave velocities in an area within 300 km of the explosion yield the following results: 5.55 km of layer 1 --- velocity 4.86 km/sec, 17.85 km of layer 2 --- velocity 6.20 km/sec, 20.84 km of layer 3 --- velocity 6.64 km/sec, the velocity of the underlying material is 7.81 km/sec. The velocities of Pn along the profiles are : 8. 37--8. 43-- 8.49-7.99-7.86-7.82--8.00 and 8.12 km/sec as the azimuth of the profiles changes counterclockwise beginning from the east. These observations strongly suggest regional variations in the mantle material. P velocities show the same trend as the Pn velocities. Travel times at stations west of Sierra Nevada show delays caused by mountain roots.48 ppengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.ThesisRICE0892reformatted digitalThesis Geol. 1963 Wu