Klein: Role of Simple Models? Do these first?
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Use this to test importance of friction laws etc.
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look at hierarchy of overlapping models: slider, CA, full featured continuum simulation
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robust features in simple models can either be wrong or irrelevant!
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To get believable results, one must have multiple efforts
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Whitcomb: Climate community has a multiscale activity where simulations at several scales are linked via boundary conditions
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Before large scale simulations, need to clarify disagreements in basic simulations ?
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Sammis: science is critical
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science is simple and elegant
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makes predictions
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can be falsified
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Large catalog of observations in need of modeling
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data patterns (in seismicity) suggest there is something to predict
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Lisa Grant, Kerry Sieh on integrating data with GEM
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larger earthquakes are most important societally
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data + models,GEMCI gives validated predictions
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Many gaps in data space needed for GEM -- 10 year proposal from Kerry
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They need good database technology (GEMXML)
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