Show Quake an Hour Just Usual Thing on Shaky Old EartH WASHINGTON Dec 20 A AThe The earth is not shakIng any pO re than It used t to but people ar are n It more I This is the answer of Director Tondorf of the Georgetown univ r city observatory to the flood f InquIries reaching hIm a as to whet I er are increasing l ii number and frequency Because of the of Instruments In- In in whIch record tremors th public Is informed constantly through their newspapers of dIsturbances dIs- dIs ot of the earths earth's crust ir in all parts of the globe The lay that the chocks are becoming close together is a result ot of this public I ity The layman iota iota- ested In the restlessness of ti earths earth's crust should know the truth says Dr Tondorf The problem ot of computing earthquake ke frequency was first undertaken by Count tie de Mont s BUS sus de Ballore time one the seismologIcal observatory of the government In Chili In 1900 after a close analysIs of the then avail avaU available able earthquake number he placed the annual over age earthquake occurrence at equivalent to an earth shock ever every two hours and twenty seven min utes 1 Four years afterward Dr August of the University of Jera Jena questioned the estimate as too loW A recalculation made by him In 1923 lifted the annual average frequency to or about one every hour FIve thousand of these quakes J hI Indicated as being felt some part of the earths earth's varyIng intensities Violent quakes classified by others as world world-shak 1 log ing occur at Intervals of every three thre and one half days either on the continents or on the oceans ocean's bot tom Those on land how however ver aver average average age every firth fifth day CalifornIa the least immune I o all United States territory Is vie vis ted by a shock on an one eighty times annually Th liability ot of one ot of these shocks be beIng e eing Ing heavy is about tenths eIght o 0 t per cent z |