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Meteoroid Impact Event Compressed Scale Playouts on 16-mm Microfilm


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

Time span: 1972-05-11 to 1975-05-04


This data set consists of 16-mm microfilm of selected large meteoroid impact playouts (type C events) recorded by at least two stations of the passive seismic event (PSE) network with compressed scale amplitudes of 10 mm or larger. 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 and the bottom. Time ticks are displayed every 10 minutes and each hour (ut) is labeled. The year and day are displayed every 6 hr. These plots are used to determine start and stop times of the selected seismic events.

Digital images (scans) of the entire contents of the microfilm are available as data collection PSPG-00941.

Alternate Names

  • Meteoroid Impact Event Compressed


  • Planetary Science: Geology and Geophysics


  • 72-031C-01I

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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