Synthetic seismograms generated by solving the seismic wave equation using numerical methods are being widely used in seismology. For fully three-dimensional seismic structure models, the generation of these synthetic seismograms may require large amount of computing resources. Conventional high-performance computer clusters may not provide a cost-effective solution to this type of applications...

When a seismologist analyses a new seismogram it is often useful to have access to a set of similar seismograms. For example if she tries to determine the event, if any, that caused the particular readings on her seismogram. So, the question is: when are two seismograms similar? To define such a notion of similarity, we first preprocess the seismogram by a wavelet decomposition, followed by a d...

Data produced by a reproducible source contains redundant information which allows seismic inversion to simultaneously determine the high-frequency uctuation in the P-wave velocity (or re ectivity) as well as the input energy source. The seismogram model is the plane-wave convolutional model derived from the constant density, variable sound velocity acoustic wave equation. The rst step is to an...

II ABSTRACT Mount Erebus has long been recognized to produce very similar seismic signatures associated with its Strombolian eruptions. decorrelation of the coda, accompanied by relative stability in the early seismogram. Using coda wave interferometry, this decorrelation was interpreted as a median change within the volcano. Closer examination of this data in this thesis shows that clipping du...

-The focus-of-attention techniques implemented in SNA2, a knowledge-based system for seismogram interpretation, are presented. They consist of data compression of the input digital records, scanning of the compressed traces to detect candidate seismograms and extraction of seismogram features. A criterion is given to rate the clarity of seismograms; the clarity defines the order in which the sy...

In this research the investigation concerning the earth structure beneath the Southwest North America landmass is carried out, which covers a small area, i.e. between Mexico and California. S speed models for this area are obtained by carrying out seismogram fitting in time domain and three simultaneous Cartesian components. Seismogram data are the effect of earthquake C052297B in Guererro, Mex...