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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.))
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
Record Number:CaltechETD:etd-01152008-110555
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-01152008-110555
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:01 Aug 2014 17:01

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