Complex P-Wave Seismograms from Simple Earthquake Sources
1974; Oxford University Press; Volume: 37; Issue: 1 Linguagem: Inglês
10.1111/j.1365-246x.1974.tb02448.x
ISSN1365-246X
AutoresA. Douglas, John Young, John Hudson,
Tópico(s)Seismology and Earthquake Studies
ResumoUsing simple models of the Earth and earthquake source we investigate theoretically the effects on the complexity of short period P seismograms of: increasing the thickness of a surface layer with low P and S velocities in the source region; increasing the source dimensions so that the body wave pulses radiated from the source last up to a maximum of 3 s; reducing the symmetry of fracture. The results show that although source dimensions and symmetry do influence complexity the main requirement for generating a really complex seismogram with the assumed models is a thick (∼10km) low velocity surface layer.
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