A hypocentral version of the space–time ETAS model

The space–time Epidemic-Type Aftershock Sequence (ETAS) model is extended by incorporating the depth component of earthquake hypocentres. The depths of the direct offspring produced by an earthquake are assumed to be independent of the epicentre locations and to follow a beta distribution, whose sha...

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Bibliographic Details
Published in:Geophysical journal international 2015-10, Vol.203 (1), p.366-372
Main Authors: Guo, Yicun, Zhuang, Jiancang, Zhou, Shiyong
Format: Article
Language:English
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Summary:The space–time Epidemic-Type Aftershock Sequence (ETAS) model is extended by incorporating the depth component of earthquake hypocentres. The depths of the direct offspring produced by an earthquake are assumed to be independent of the epicentre locations and to follow a beta distribution, whose shape parameter is determined by the depth of the parent event. This new model is verified by applying it to the Southern California earthquake catalogue. The results show that the new model fits data better than the original epicentre ETAS model and that it provides the potential for modelling and forecasting seismicity with higher resolutions.
ISSN:0956-540X
1365-246X
DOI:10.1093/gji/ggv319