( ( For ( ( a ( constant rate ) ) ( of stress ) ) ) ( ( ( increase ( due ( to plate ) ) ) ( ( motion , ) ( ( ( ( ( the greater ) ( the time ) ) ( between earthquakes ) ) , ) ( ( ( ( ( ( the greater ) ( the ( stress release ) ) ) ( when ( ( the earthquake ) occurs ) ) ) -LRB- ) ( larger magnitude ) ) -RRB- ) ) ) ) . ) )
(ROOT (SINV (PP (IN For) (NP (NP (DT a) (JJ constant) (NN rate)) (PP (IN of) (NP (NN stress))))) (VP (VBP increase) (ADJP (JJ due) (PP (TO to) (NP (NN plate))))) (NP (NP (NN motion)) (, ,) (NP (NP (DT the) (ADJP (JJR greater))) (NP (DT the) (NN time)) (PP (IN between) (NP (NNS earthquakes))) (, ,) (NP (NP (NP (ADJP (DT the) (JJR greater)) (DT the) (NN stress) (NN release)) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (NN earthquake)) (VP (VBZ occurs))))) (-LRB- -LRB-) (NP (JJR larger) (NN magnitude)) (-RRB- -RRB-)))) (. .)))
For a constant rate of stress increase due to plate motion, the greater the time between earthquakes, the greater the stress release when the earthquake occurs (larger magnitude).
(ROOT (S (NP (NP (CD Two) (NNS plates)) (VP (VBG sliding))) (VP (MD can) (VP (VB increase) (NP (NP (DT the) (NN occurance)) (PP (IN of) (NP (NNS earthquakes)))))) (. .)))