(S (S (NP (BASENP (NN Three) (JJR smaller) (NNS quakes)) (VP (VBG ranging) (PP (IN from) (NP (QP (BASENP (NN 5.1)) (PP (TO to) (BASENP (NN 5.3)))) (NNS magnitudes))))) (VP (ADVP (RB shortly)) (VBD followed))) (PERIOD .))