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| Titel |
A Barnes-Hut scheme for simulating fault slip |
| VerfasserIn |
N. M. Beeler, T. E. Tullis |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 18, no. 2 ; Nr. 18, no. 2 (2011-03-04), S.133-146 |
| Datensatznummer |
250013889
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| Publikation (Nr.) |
 copernicus.org/npg-18-133-2011.pdf |
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| Zusammenfassung |
| To account for natural spatial and temporal complexity, large-scale,
long-duration calculations are required for simulations of seismicity in
fault zones that host large earthquakes. Without advances in computational
methods, the rate of progress in "earthquake simulator" models and
associated earthquake forecasts is limited by the rates at which computer
speed and storage increase. To explore improvements in computational
efficiency we develop the first implementation of the Barnes-Hut
algorithm (Barnes and Hut, 1986) to calculate elastic interactions in a fault
model. The Barnes-Hut method is an efficient, numerical scheme that
treats local forces exactly and distant forces approximately. The approach is
illustrated in example simulations of non-linear fault strength in plane
strain. Rudimentary error analysis indicates that efficient calculations,
where execution time scales with number of grid points (N) as
N log N, can be conducted routinely with errors on the order of 0.1%.
We expect the Barnes-Hut method to be well suited for conducting
initial exploration of parameter space for fault simulations with non-linear
constitutive equations, and for efficient calculations of stress interaction
in complex fault systems. |
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