Energy balance of simple elastodynamic sources |
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| Authors: | Václav Vavry?uk |
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| Institution: | (1) Department of Earth and Planetary Systems Science, Hiroshima University, 1-3-1 Kagami-yama, 724 Higashi-Hiroshima, Japan |
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| Abstract: | Complete relations are derived for energy and energy flux of elastic waves generated by an isotropic and double-couple source in a perfectly elastic, homogeneous, isotropic, and unbounded medium. In the energy balance of elastodynamic sources near-field waves play an essential role, transforming static energy into wave energy, andvice versa. For explosive and dislocation sources, the sources surface radiates a positive wave energy that is partially distributed to the medium transforming into static energy. For implosive and antidislocation sources, the source surface generates elastic waves, but it does not necessarily imply that it also radiates a positive wave energy. The energy transported by waves can originate in gradual transformation of the static-to-wave energy during propagation of waves through a stressed medium.On leave from Geophysical Institute, Czech Academy of Sciences, Bo ní II/1401, 41 31, Praha 4 Czech Republic |
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| Keywords: | Double-couple earthquake elastodynamics energy balance isotropic source near-field waves wave energy |
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