Distance-Amplitude Relationships for Long-Period P, S, and LR from Measurements on Recordings of the Long-Period Experimental Stations

Abstract

Measurements on long-period P, S, and LR phases were extracted from an eight-month data base for nine stations of the Long Period Experimental network. Amplitude-distance curves were plotted for P and S from shallow-focus events; these curves generally agreed with the commonly-used Gutenberg-Richter B factors. The amplitude-distance curve for LR was different in slope than the commonly-used correction curve for M sub S; however, this difference would not be sufficient to affect routine network M sub S estimates by more than roughly . 1 magnitude unit. The Q for 20-second LR implied by this new data is roughly 700, in contrast to the 300 implied by the accepted amplitude-distance curve.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 24, 1975
Accession Number
ADA021506

Entities

People

  • D. H. Von Seggern

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Analysis Of Variance
  • Attenuation
  • Confidence Limits
  • Data Analysis
  • Databases
  • Diffraction
  • Earthquakes
  • Gain
  • High Gain
  • Information Science
  • Measurement
  • Rayleigh Waves
  • Seismographs
  • Statistical Analysis
  • Surface Waves
  • Virginia
  • Waves

Fields of Study

  • Environmental science

Readers

  • Mathematics or Statistics
  • Seismology