(S (S (S (NP (BASENP (DT The) (NN quake)) (PRN (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VP (VBD struck) (PP (IN at) (NP (BASENP (NN 22:01)) (BASENP (NN UTC))))) (BASENP (NN yesterday) (NN evening))))) (COMMA ,))) (VP (VBD hit) (PP (IN at) (NP (BASENP (DT a) (NN depth)) (PP (IN of) (NP (BASENP (QP (RB approximately) (NN 54)) (NNS kilometers)) (PRN (LRB -LRB-) (BASENP (NN 34) (NN mi)) (RRB -RRB-)))))))) (PP (VBG according) (PP (TO to) (BASENP (DT the) (NNP United) (NNPS States) (NNP Geological) (NNP Survey))))) (PERIOD .))