title: Elastic wave velocities of lunar samples at high pressures and their geophysical implications.
abstract: Ultrasonic measurement of P and S velocities of Apollo 11 lunar samples 10020, 10057, and 10065 to 5 kilobars pressure at room temperature shows a pronounced increase of velocity (as much as twofold) for the first 2 kilobars. The travel times predicted from the velocity-depth curve of sample 10057 are consistent with the results of the Apollo 12 seismic experiments. At pressures below 200 bars, the samples are highly attenuating; for both P and S waves, the value of Q is about 10.
authors.forename: H
authors.initials: H
authors.lastname: Kanamori
authors.forename: A
authors.initials: A
authors.lastname: Nur
authors.forename: D
authors.initials: D
authors.lastname: Chung
authors.forename: D
authors.initials: D
authors.lastname: Wones
authors.forename: G
authors.initials: G
authors.lastname: Simmons