 The UCERF3 results are an average of all these weighted alternatives.In UCERF2 each fault was modeled separately, as if ruptures do not extend to other faults.This assumption of fault segmentation was suspected as the cause of UCERF2 predicting nearly twice as many earthquakes in the M 6.5 to 7.0 range then actually observed, and is contrary to the multifault rupturing seen in many earthquakes.