itudes . ▁ ▁G uten berg ' s ▁contribution ▁was ▁substantial , ▁but ▁his ▁a version ▁to ▁inter views ▁contributed ▁to ▁his ▁name ▁being ▁left ▁off ▁the ▁scale . ▁After ▁the ▁publication ▁of ▁the ▁proposed ▁scale ▁in ▁ 1 9 3 5 , ▁se ism olog ists ▁quickly ▁adopted ▁it ▁for ▁use ▁in ▁meas uring ▁the ▁intensity ▁of ▁earth qu akes . ▁ ▁Rich ter ▁remained ▁at ▁the ▁Car neg ie ▁Institution ▁until ▁ 1 9 3 6 , ▁when ▁he ▁obtained ▁a ▁post ▁at ▁the ▁California ▁Institute ▁of ▁Technology , ▁where ▁Ben o ▁G uten berg ▁worked . ▁G uten berg ▁and ▁Rich ter ▁published ▁Se ism icity ▁of ▁the ▁Earth ▁in ▁ 1 9 4 1 . ▁ ▁Its ▁re vised ▁edition , ▁published ▁in ▁ 1 9 5 4 , ▁is ▁considered ▁a ▁standard ▁reference ▁in ▁the ▁field . ▁ ▁Rich ter ▁became ▁a ▁full ▁professor ▁at ▁the ▁California ▁Institute ▁of ▁Technology ▁in ▁ 1 9 5 2 . ▁In ▁ 1 9 5 8 , ▁he ▁published ▁Element ary ▁Se ism ology ▁based ▁on ▁his ▁under grad uate ▁teaching ▁notes . ▁As ▁Rich ter ▁s eld om ▁published ▁in ▁peer - review ed ▁scientific ▁journ als , ▁that ▁is ▁often ▁considered ▁his ▁most ▁important ▁contribution ▁to ▁se ism ology . ▁ ▁Rich ter ▁spent ▁ 1 9 5 9 ▁and ▁ 1 9 6 0 ▁in ▁Japan ▁as ▁a ▁Ful br ight ▁scholar . ▁ ▁Ar ound ▁this ▁time ▁in ▁his ▁career , ▁he ▁became ▁involved ▁in ▁earth qu