(S (S (NP (BASENP (NNP Indonesia) (POS 's)) (NP (BASENP (NN meteorology) (CC and) (NN geophysics)) (NN agency))) (VP (VP (VP (VBD recorded) (NP (QP (ADVP (IN at) (JJS least)) (NN two)) (NNS aftershocks))) (PP (BASENP (QP (RB about) (NN 20)) (NNS minutes)) (PP (IN after) (BASENP (DT the) (JJ first) (NNS tremors))))) (COMMA ,) (NP (NP (NP (BASENP (NN one)) (VP (VBG measuring) (BASENP (NN 5.5)))) (CC and) (BASENP (DT the) (JJ other) (NN 5.3))) (PP (IN on) (BASENP (DT the) (NNP Richter) (NN scale)))))) (PERIOD .))