<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Refining earthquake clustering models"^^ . "Assuming that earthquakes are the realization of a stochastic point process and that the\nmagnitude distribution of all earthquakes is described by the Gutenberg-Richter law with a\nconstant b value, we model the occurrence rate density of earthquakes in space and time by\nmeans of an epidemic model. The occurrence rate density is computed by the sum of\ntwo terms, one representing the independent, or spontaneous activity, and the other\nrepresenting the activity induced by previous earthquakes. While the first term depends\nonly on space, the second one is factored into three terms that include the magnitude, time,\nand location, respectively, of the past earthquakes. In this paper we use the modified Omori\nlaw for the time term, focusing our investigation on the magnitude and space terms. We\nformulate two different hypotheses for each of them, and we find the respective maximum\nlikelihood parameters on the basis of the catalog of instrumental seismicity recorded in Italy\nfrom 1987 to 2000. The comparison of the respective likelihood computed for the\nseismicity recorded in 2001 provides a way for choosing the best model. The confidence\nlevel of our choice is then assessed by means of a Monte Carlo simulation on the\nvarioushypotheses. Our study shows that an inverse power density function is more reliable\nthan a normal density function for the space distribution and that the hypothesis of\nscale invariance of aftershock productivity with respect to magnitude can be rejected with\nhigh confidence level. The final model is suitable for computing earthquake occurrence\nprobability in real circumstances."^^ . "2003-10-09" . . "108" . "B10" . . "American Geophysical Union"^^ . . . "Journal of Geophysical Research"^^ . . . "01480227" . . . . . . . . . . . . . "Maura"^^ . "Murru"^^ . "Maura Murru"^^ . . "Rodolfo"^^ . "Console"^^ . "Rodolfo Console"^^ . . "Anna Maria"^^ . "Lombardi"^^ . "Anna Maria Lombardi"^^ . . "Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy"^^ . . . . . . "HTML Summary of #1455 \n\nRefining earthquake clustering models\n\n" . "text/html" . . . "Clustering and migration" . .