<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Apparent clustering and apparent background earthquakes biased by undetected seismicity"^^ . "In models of triggered seismicity and in their estimation from empirical data, the detection threshold md is commonly equated to the magnitude m0 of the smallest triggering\r\nearthquake. This unjustified assumption neglects the possibility of shocks below the detection threshold triggering observable events. We introduce a formalism that\r\ndistinguishes between the detection threshold md and the minimum triggering earthquake m0≥ md . By considering the branching structure of one complete cascade of triggered\r\nevents, we derive the apparent branching ratio n a (which is the apparent fraction of aftershocks in a given catalog) and the apparent background source S a observed when only\r\nthe structure above the detection threshold md is known due to the presence of smaller undetected events capable of triggering larger events. If, as several recent analyses have shown, earthquake triggering is controlled in large part by the smallest magnitudes, this implies that previous estimates of the clustering parameters may significantly\r\nunderestimate the true values: For instance, an observed fraction of 55% of aftershocks is renormalized into a true value of 75% of triggered events."^^ . "2005-09-22" . . "110" . "B9" . . "American Geophysical Union"^^ . . . "Journal of Geophysical Research"^^ . . . "01480227" . . . . . . . . . . "Maximillian J."^^ . "Werner"^^ . "Maximillian J. Werner"^^ . . "Didier"^^ . "Sornette"^^ . "Didier Sornette"^^ . . "Department of Earth and Space Sciences and Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California, USA"^^ . . . "Laboratoire de Physique de la Matiere Condensee, CNRS UMR6622, Universite de Nice-Sophia Antipolis, Nice, France"^^ . . . . . . "HTML Summary of #1402 \n\nApparent clustering and apparent background earthquakes biased by undetected seismicity\n\n" . "text/html" . . . "Clustering and migration" . .