On Some Problems Concerning the Seismic Field Methods
- Creators
- Gutenberg, B.
Abstract
The periods of longitudinal waves produced by explosions increase with distance in a similar way as earthquake waves (equation 1). The amplitudes of the waves (equation 1) depend not only on the amount of energy reflected or refracted at discontinuities, but also on the angle of incidence at the instruments and its rate of change with distance. Calculations on the relative amplitudes of direct, reflected and refracted waves (Fig. 1) are in agreement with the observations. Formulae are given to calculate the approximative dip of discontinuities using either the distance at which the travel time of the reflected wave is a minimum or the difference in travel time between two instruments, especially at two opposite sides of the shot point, or the direction of the travel time curve at the shot point. The surface waves (ground roll) recorded from explosions can hardly be pure elastic waves; their velocity is too small for either Love- or Rayleigh-waves.
Additional Information
© 1936 Akademische Verlagsgesellschaft.Attached Files
Published - Gutenberg_1936p125.pdf
Files
Name | Size | Download all |
---|---|---|
md5:c1ee572a211325de11467970c859037c
|
10.5 MB | Preview Download |
Additional details
- Eprint ID
- 101446
- Resolver ID
- CaltechAUTHORS:20200221-084953379
- Created
-
2020-02-21Created from EPrint's datestamp field
- Updated
-
2020-02-21Created from EPrint's last_modified field
- Other Numbering System Name
- Balch Graduate School of the Geological Sciences
- Other Numbering System Identifier
- 195