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Ground vibrations near explosions

Citation

Howell, Benjamin F., Jr. (1949) Ground vibrations near explosions. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-01152008-110555

Abstract

Records are shown of the three components of ground vibration taken at distances out to 3284 meters following small explosions of dynamite about ten meters underground. The apparatus used to record this motion is described, and its limitations discussed. The refracted compressional waves recorded are used to calculate roughly the thickness of the near surface layers. Three principal dispersed waves are recognized and described. It is shown that two of these do not behave like any well known type of wave motion. It is pointed out that this is not surprising since the near surface material is probably neither homogeneous nor elastic and these conditions are required by the classical theories. The third dispersed wave is shown to closely resemble a modified Rayleigh wave. Three published theories of such modified motion are reviewed and compared with the observations. The recorded data are also compared with other similar records copies of which have been published.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Geology
Degree Grantor:California Institute of Technology
Division:Geological and Planetary Sciences
Major Option:Geology
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Gutenberg, Beno
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1949
Additional Information:Supplemental Files Information: Chart I – Records of ground motion at distances out to 1711 meters: Supplement 1 from "Ground vibrations near explosions" (Thesis). Chart II – Records of ground motion at 2106 and 2259 meters: Supplement 2 from "Ground vibrations near explosions" (Thesis). Chart III – Record of ground motion at 3284 meters: Supplement 3 from "Ground vibrations near explosions" (Thesis). Chart IV – Arrival times of P, X, C and R pulses: Supplement 4 from "Ground vibrations near explosions" (Thesis). Chart V – Arrival times of H pulses: Supplement 5 from "Ground vibrations near explosions" (Thesis). Chart VI – Ground velocity during the arrival of R at 1493 meters from an explosion: Supplement 6 from "Ground vibrations near explosions" (Thesis). Chart VII – Arrival times of T pulses: Supplement 7 from "Ground vibrations near explosions" (Thesis).
Record Number:CaltechETD:etd-01152008-110555
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-01152008-110555
Related URLs:
URLURL TypeDescription
https://doi.org/10.22002/D1.986DOISupplement 1 in CaltechDATA: Chart I – Records of ground motion at distances out to 1711 meters
https://doi.org/10.22002/D1.987DOISupplement 2 in CaltechDATA: Chart II – Records of ground motion at 2106 and 2259 meters
https://doi.org/10.22002/D1.988DOISupplement 3 in CaltechDATA: Chart III – Record of ground motion at 3284 meters
https://doi.org/10.22002/D1.989DOISupplement 4 in CaltechDATA: Chart IV – Arrival times of P, X, C and R pulses
https://doi.org/10.22002/D1.990DOISupplement 5 in CaltechDATA: Chart V – Arrival times of H pulses
https://doi.org/10.22002/D1.991DOISupplement 6 in CaltechDATA: Chart VI – Ground velocity during the arrival of R at 1493 meters from an explosion
https://doi.org/10.22002/D1.992DOISupplement 7 in CaltechDATA: Chart VII – Arrival times of T pulses
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:192
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:15 Jan 2008
Last Modified:04 Sep 2018 21:22

Thesis Files

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PDF (Howell_bf_1949.pdf) - Final Version
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