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Expanded Time Scale Playouts of Lunar Seismic Data on 35-mm Microfilm


Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Time span: 1972-04-21 to 1972-08-08


This data set consists of the expanded time scale playouts that are taken directly from the passive seismic experiment event tapes (data set 72-031C-01B) and are not processed in any way (e.g., no filtering, smoothing, signal averaging, etc.). The multi-station playouts (usually 10 in length) were generated for most long period (15-sec resonances) seismic events observed at two or three stations, beginning February 5, 1971, with peak-to-peak signal amplitudes of two or more digital units. The annotation format consists of year (in which the playout begins), SKIP X MAG (C) (where SKIP equals the tape identification number, MAG equals a multiplicative factor which adjusts the signal amplitude of an event for plotting, and C equals the long-period component where X is LPX, Y is LPY, and Z is LPZ), theday of the year on which the playout begins, and hr, min, sec, which is the universal time at which the playout begins. Time ticks are placed at 1-min intervals. The time marks are not corrected for possible clock errors. Notations on the seismograms such as phase picks (e.g., P, S), event classification (e.g., A, B, C, M), etc., are not primary data but interpretations and should be recognized and used as such.

Alternate Names

  • Expanded Scale Playouts


  • Planetary Science: Geology and Geophysics


  • 72-031C-01C

Additional Information



Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. Frederick K. DuennebierData ProviderUniversity of Texas,
Dr. Gary V. LathamGeneral ContactUniversity of Texas, Galveston
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