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Record Details

Record 44 of 1407
High-frequency lunar teleseismic events
Author and Affiliation:
Nakamura, Y.
Dorman, J.
Duennebier, F.
Ewing, M.
Lammlein, D.
Latham, G.(Texas, University, Galveston, Tex., United States)
Abstract: A small number of seismic signals, including some of the strongest observed to date, have been identified as representing a fourth principal category of natural lunar seismic events with characteristics distinct from those produced by normal meteoroid impacts, deep moonquakes, and thermal moonquakes. These signals are much richer in high frequencies than other events observed at comparable distances, and display relatively impulsive P- and S-wave beginnings, indicating negligible seismic-wave scattering near the source. Source depths of these events may range between 0 and perhaps 300 km. These and other characteristics could represent either (1) meteoroids impacting upon outcrops of competent lunar crystal rock, (2) rare impacting objects that penetrate to competent rock below a scattering zone, or (3) shallow tectonic moonquakes.
Publication Date: Jan 01, 1974
Document ID:
19750055654
(Acquired Dec 01, 1995)
Accession Number: 75A39726
Subject Category: LUNAR AND PLANETARY EXPLORATION
Document Type: Conference Proceedings
Publication Information: (SEE A75-39540 19-91)
Publisher Information: United States
Meeting Information: Lunar Science Conference; 5th; March 18-22, 1974; Houston, TX
Contract/Grant/Task Num: NAS9-13143
Financial Sponsor: NASA; United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FREQUENCY RESPONSE; LUNAR SEISMOGRAPHS; METEORITE COLLISIONS; MOONQUAKES; SEISMIC WAVES; COMPRESSION WAVES; LUNAR CRUST; LUNAR MAPS; LUNAR ROCKS; S WAVES; TECTONICS
Imprint And Other Notes: In: Lunar Science Conference, 5th, Houston, Tex., March 18-22, 1974, Proceedings. Volume 3. (A75-39540 19-91) New York, Pergamon Press, Inc., 1974, p. 2883-2890.
Availability Source: Other Sources
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