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Moonquake Event Compressed Scale Playouts on 16-mm Microfilm


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

Time span: 1971-10-15 to 1974-05-18


This data set consists of 16-mm microfilm of selected moonquakes in a compressed scale format. The selected moonquakes are those with matching signal characteristics (type A events) that have been observed at most stations of the lunar passive seismic network. The absolute value of the difference between consecutive data points is summed over 40 points for long period data (320 points for short period data), and this value is plotted yielding one value for each 6 seconds of data. Consecutive points are plotted with opposite polarity to yield a line with the appearance of a seismogram. Components are arranged LPX, LPY, LPZ, SPZ, with long period X at the top and short period Z at the bottom. Time ticks are displayed every 10 min and each hour (UT) is labeled. The year and day are displayed every 6 hours. These plots are used to determine start and stop times of the selected seismic events.

Alternate Names

  • Moonquake Event Compr Scale P/O


  • Planetary Science: Geology and Geophysics


  • 69-099C-03M

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. Frederick K. DuennebierGeneral ContactUniversity of Texas,
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