Search NASA⌕ Search

Engineering topics

Meissner, R.

Publications and source records attributed to Meissner, R..

A1 moonquakes - Problems of determining their epicenters and mechanisms

Review of some of the problems associated with the determination of epicenters and mechanisms of moonquakes with the aid of the four seismic stations now operating on the moon. No decoupling of compressional, transverse, and surface waves takes place there, no clear first arrivals can be found, and coherence between vertical and horizontal components on a seismograph stationed on the moon is poor. New techniques for locating epicenters are presented.

Meissner, R.↗

Seismology of the moon and implications on internal structure, origin and evolution.

The objective of the passive seismic experiment is to measure vibrations of the lunar surface produced by all natural and artificial sources of seismic energy and to use these data to deduce the internal structure and constitution of the moon and the nature of tectonic processes which may be active within the moon. Lunar seismic signals are discussed together with the sources of these signals, and aspects of lunar structure and dynamics. Seismic signals from approximately 250 natural events and from two man-made impacts have been recorded during seven months of operation of the two seismic stations installed during Apollo missions 11 and 12.

Ewing, M.↗