( ( Greek seismologists ) ( , ( however ( , ( ( have ( ( ( disputed ( ( the intensity ) ( of ( ( yesterday 's ) tremor ) ) ) ) , ) ( claiming ( it ( ( ( ( ( registered ( ( 6.8 and ) ( not 5.8 ) ) ) ( on ( the ( Richter scale ) ) ) ) ( as ( ( Turkish seismologists ) reported ) ) ) , ) ( while ( ( experts ( in Strasbourg ) ) ( say ( ( the quake ) ( measured 6.1 ) ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (JJ Greek) (NNS seismologists)) (, ,) (ADVP (RB however)) (, ,) (VP (VBP have) (VP (VBN disputed) (NP (NP (DT the) (NN intensity)) (PP (IN of) (NP (NP (NN yesterday) (POS 's)) (NN tremor)))) (, ,) (S (VP (VBG claiming) (SBAR (S (NP (PRP it)) (VP (VBD registered) (NP (NP (CD 6.8)) (CC and) (NP (RB not) (CD 5.8))) (PP (IN on) (NP (DT the) (NNP Richter) (NN scale))) (SBAR (IN as) (S (NP (JJ Turkish) (NNS seismologists)) (VP (VBD reported)))) (, ,) (SBAR (IN while) (S (NP (NP (NNS experts)) (PP (IN in) (NP (NNP Strasbourg)))) (VP (VBP say) (SBAR (S (NP (DT the) (NN quake)) (VP (VBD measured) (NP (CD 6.1))))))))))))))) (. .)))
Greek seismologists, however, have disputed the intensity of yesterday's tremor, claiming it registered 6.8 and not 5.8 on the Richter scale as Turkish seismologists reported, while experts in Strasbourg say the quake measured 6.1.
(ROOT (S (NP (NNS Seismologists)) (ADVP (RB originally)) (VP (VBD measured) (NP (NP (DT the) (NN intensity)) (PP (IN of) (NP (DT an) (NN earthquake)))) (PP (IN with) (NP (DT the) (JJ mercalli) (NN scale)))) (. .)))
Seismologists originally measured the intensity of an earthquake with the mercalli scale.