ETAS definition
Examples of ETAS in a sentence
This includes the provision of any documents which ETAS controls and is entitled to provide to Customer.
Indeed, the simulated ETAS processes contained a median of just three points, and the spatial distances of the points in the simulated ETAS prototype from the mainshock are much smaller than the cor- responding distances in the prototype for the Harvard catalog.
Note that in the simulated ETAS catalog, the slight increase in the magnitudes of the points with time since mainshock is entirely coincidental, since the magnitudes of the simulated points are simply sampled at random from the empirical distribution of aftershock magnitudes.
That is, for each of the 49 mainshocks, we simulated its aftershocks according to the ETAS model of Ogata (1998), using the fitted parameters in Ogata (1998).
The difference between the simulated ETAS processes and the observed Harvard aftershocks could well be due to particularities in the Central and Western Honshu aftershocks used to determine the fitted parameters.
The Company recognized a $48.3 million tax expense related to the change in the tax rate used in Chile from 20% to 35% due to the enactment of new legislation on September 26, 2014.
Indeed, we generated other iterations of the simulated ETAS catalog, and in subsequent simulations such a trend did not persist, though the other features of the prototype were the same, including the small number of points.It is important to note that the simulated ETAS catalog was generated with the parame- ters specified by Ogata (1998), who estimated these parameters by fitting them by maximum likelihood to the Honshu catalog.
For instance, one may obtain a typical realization of the ETAS model of Ogata (1998) by simulating the model many times, and determining the prototype of these simulated ETAS processes.Figure 9 shows the prototype applied to data simulated according to the ETAS model, but with mainshocks identical to those in our subset of the Harvard catalog, described in Section 2.
Develop computationally efficient performance metrics of forecasts and predictions that can account for epistemic uncertainties and evaluate forecasts specified as sets of simulated catalogs (e.g., simulation-based ETAS models or UCERF3-ETAS).● Supporting Operational Earthquake Forecasting (OEF).
Retrospective calculations using ETAS models to track the short-term (1-day) evolution of seismic sequences in California [229] and Italy [230] show nominal probability gains on the order of 10-100, similar to single-generation aftershock models such as STEP.