Apollo Lunar Seismic Experiment—Final summary
Abstract
Processing and initial analysis of the entire set of Apollo lunar seismic data collected continuously from 1969 through 1977 have now been completed. Recent results include: 1) better defined deep moonquake locations, which appear to be bounded rather sharply between about 800 km and 1000 km depths with concentrations near both boundaries; and 2) middle mantle (∼500 to 1000 km depth) seismic velocities of Vp, = 8.3 ± 0.4 km/sec and Vs = 4.6 ± 0.2 km/sec, which are significantly higher than previous estimates and represent an increase of velocities from the upper mantle as opposed to a decrease in previous estimates.
- Publication:
-
Lunar and Planetary Science Conference Proceedings
- Pub Date:
- 1982
- DOI:
- 10.1029/JB087iS01p0A117
- Bibcode:
- 1982LPSC...13..117N
- Keywords:
-
- Apollo Lunar Surface Experiments Package;
- Lunar Geology;
- Lunar Seismographs;
- Moonquakes;
- Lunar Core;
- Meteorite Collisions;
- Propagation Velocity;
- Seismic Waves;
- Lunar and Planetary Exploration;
- Moon:Seismicity;
- SEISMOLOGY;
- EXPERIMENTS;
- DATA;
- SEISMIC EVENTS;
- VELOCITY;
- STRUCTURE;
- MOONQUAKES;
- METEOROIDS;
- IMPACTS;
- INTERIORS;
- MOON;
- APOLLO MISSIONS;
- DEPTH;
- SEISMOGRAMS;
- SOURCE;
- DISTRIBUTION;
- COORDINATES;
- THERMAL EFFECTS;
- DIAGRAMS;
- Moon;
- Planetology: Interior of moon (tectonics;
- force fields;
- composition;
- etc.);
- Seismology: Seismic sources (mechanisms;
- magnitude;
- frequency spectrum;
- and time distribution)