(S (S (S (NP (QP (ADVP (IN At) (JJS least)) (NN 27)) (NNS aftershocks)) (VP (VBD were) (VP (ADVP (RB also)) (VBN recorded)))) (COMMA ,) (SBAR (WHNP (BASENP (DT the) (JJS strongest)) (WHPP (IN of) (WHNP (WDT which)))) (S (VP (VP (VBD came) (PRT (RP in))) (PP (IN at) (BASENP (NN 5.5) (CC and) (NN 5.9) (NN magnitude))))))) (PERIOD .))