NSSDCA ID: PSPG-00252
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1971-02-07 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 71-008C-04A) and are not processed in any way (e.g., no filtering, smoothing, signal averaging, etc.). The playouts (usually 10 min in length) were generated for all long period (15-sec resonance) seismic events observed during the period February 5, 1971 to April 21, 1972 with peak-to-peak signal ground motion amplitudes of two or more digital units and for selected events past that time. The annotation format consists of year (in which the playout begins), SKIP X MAG (C) (where SKIP = the tape identification number, MAG = a multiplicative factor which adjusts the signal amplitude of an event for plotting, C = the long period component where X is LPX, Y is LPY and Z is LPZ), the day 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. These 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 of the data and should be recognized and used as such.
Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Gary V. Latham | Data Provider | University of Texas, Galveston | |
Mr. G. P. Barnes | General Contact | NASA Johnson Space Center |