( ( ( An earthquake ) ( ( measuring 4.2 ) ( on ( the ( Richter scale ) ) ) ) ) ( ( ( struck ( ( the ( central ( Anatolian town ) ) ) ( of Afyon ) ) ) ( on ( ( Friday , ) ( ( the ( state-run ( Anatolian ( news agency ) ) ) ) ( ( quoted seismologists ) ( as saying ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT An) (NN earthquake)) (VP (VBG measuring) (NP (CD 4.2)) (PP (IN on) (NP (DT the) (NNP Richter) (NN scale))))) (VP (VBD struck) (NP (NP (DT the) (JJ central) (NNP Anatolian) (NN town)) (PP (IN of) (NP (NNP Afyon)))) (PP (IN on) (NP (NP (NNP Friday)) (, ,) (NP (NP (DT the) (JJ state-run) (NNP Anatolian) (NN news) (NN agency)) (VP (VBN quoted) (NP (NNS seismologists)) (PP (IN as) (S (VP (VBG saying))))))))) (. .)))
An earthquake measuring 4.2 on the Richter scale struck the central Anatolian town of Afyon on Friday, the state-run Anatolian news agency quoted seismologists as saying.
(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.