OBSERVATORY RECORDS

Evening Post, Volume CXXXIV, Issue 29, 3 August 1942, Page 6

OBSERVATORY RECORDS

Compared with^the earthquake on June- 24; ,the sljake on : Sunday morning did hot-last "so long, and was of slightly- less; intensity.- It: lasted for SOf seconds, compared-vwith the <75 seconds or so 'of >the previous shake,; and its' strength on -^he Rossj-Forel scale is estimated' to ha;ve been 7, or 7 plus, compared, with; B.* The more delicate seismological'. recording- instruments at the pofnjhi6n: Observatory were put put of. ac'tiph; as was,tp.be expected, but very? good "recordings, .were made by; those xtesigned/ to- record heavy shocks.-..1'; "; '•':' '* . -:[ '■ ■>•• .•'•..■ ;.

KTheeartliquake; took place at ■ 12.34 aoii.,: -and • its ■ epicentre... is., calculated by the Dominion ' seisttiologist, . Mr; Hayes, to have been about 50 miles from: Wellington/ The presumption isf 'that ■. the origin was :in the same leicality'as the ■earthquake '■■ on"June. 24," but to determine' 'the ■ exact • locality of the epicentre »> necessitates ithe- analysis 'dt-\ reports* and: records •'.in "addition .to those\ of the'" Observatory, arid- it: will 'be/ a day or -two before this ! is- done.,. »The same: applies to the less severe, but:quite pronounced, short and .hpisy/i shake^ which; "was* felt 'at 4.47 p.m:. ■ pnVSaturday■ ■ A-slight^after-' shock,. wais v^-fjelt •.about-: .7»45> a.m.. yesterday,', and a fejiv .other : after-shocks have * since i been recorded,, but these have-ibeeh o f !yery slight -intensity. 'The comparative vaHsence' of after-shocks, i^ayipossibly;.bei-due, to the epicentre b.eing : deep-rs^ated.: ..., • . ; ;. < : ..;.. \ V^Tp.'hipStV.p'epple" the ."earthquake seemed ":to V!> have niore' of ;a swaying nipition: abb.ut it.vthan .had,the .shake: on Jiitie ;;2"4, :i;a'n,d ..there;1 appeared to be rather;,''less''" subterranean - ' rumbling, but the. effects" varied' in: different parts ■ of v jthev district^ largely: owing .to . variations'ih the-geological structure1 of the gro|und."' ■' ■,;,,-. '<!' ■■■■:*' ■■"■.. % ~■■.■..■." "■. y