(S (S (PP (VBG According) (PP (TO to) (BASENP (DT the) (NNP USGS)))) (S (NP (BASENP (JJ numerous) (NNS earthquakes)) (VP (VBN ranging) (PP (IN from) (NP (BASENP (NNS magnitudes)) (NP (BASENP (NN 5.1)) (PP (TO to) (BASENP (NN 6.1)))))))) (VP (VBP have) (VP (VBN been) (VP (VP (VBN reported) (PP (IN off) (NP (BASENP (DT the) (JJ western) (NN coast)) (PP (IN of) (BASENP (NNP Japan)))))) (COMMA ,) (S (VP (VBG prompting) (S (BASENP (FW tsunami) (NNS warnings)) (VP (TO to) (VP (VB be) (VP (VBN issued)))))))))))) (PERIOD .))