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Seismic Event Log as Card Images


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

Time span: 1969-11-20 to 1975-12-31


This data set consists of a catalog identifying all seismic events observed on the long period components of the lunar seismic network. It is tape-generated from the IBM cards supplied by the experimenter. Events are presented in chronological order with the following parameters listed -- year, day of year, event start and stop times (UT), maximum signal amplitudes, playouts, quality, and type class. A stop time of "9999" implies that the event overlaps the next event. The amplitudes given are for the vertical axis. Amplitudes were picked from the compressed scale playouts (data set 69-099C-03B). Motion amplitudes, expressed in millimeters, are picked from records plotted at a scale of 400 digital units per in. A "1" in the playout column implies that an expanded scale playout (data set 69-099C-03D) is available for that event. A quality factor is assigned whenever the record for an event is other than normal. Priority is given to the smallest appropriate number -- (1) no data at the time the event occurred, (2) clock rate error, (3) noisy record, and (4) records masked by another event. The event type is an interpretation of the possible origin of the event where (A) is a classified moonquake, (M) is a suspected moonquake, (C) is a suspected meteoroid impact, (Z) is mostly short period, (X) is an unusual event, (L) is a LM impact, and (S) is a Saturn IV-B impact. The event class gives the classification number for type A events. All events in the same class have matching waveforms.

Alternate Names

  • Event Log as Card Images


  • Planetary Science: Geology and Geophysics


  • 69-099C-03G

Additional Information



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



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