ML17262A002
| ML17262A002 | |
| Person / Time | |
|---|---|
| Issue date: | 05/31/1974 |
| From: | Kouts H Office of Nuclear Regulatory Research |
| To: | Rogers L Office of Nuclear Regulatory Research |
| References | |
| RIL-0002 | |
| Download: ML17262A002 (2) | |
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L. Rogers, Director Directorate of Re01llatory Stanciards
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11ds memo is to tI'!UlSr:'.it safety res~rci1 inion:'.ation to you
- .'o for the assist.ance it 1t~y provi~ i...-i rc;uJ.atory use. 'foe Jraft
"/* copy of t.-u~ "S-.:is;;:otc-,ctonic :-np oi t,;~e Eastern ir..itci States,"
with occo! Qany:L'lg text, was tra:J.S.:it:e.1 to t."'l.e ..::U:C on :.:i.y 20, 1974.
1~1.is r<::Jrcs~1ts Le results of r:!Ore t~.;.a.n t.-o years of j oir1t effort by t;le l6GS Mid ~"-le fon.&~r Scisi::.olo;,y .iJivisicn of ti1e i\Q.~.
'Iiie most si~fic.."l:a*;t aspt..--ct of tii.~ **~:-> is tl1:it it relates the spatial Cis'tl*i;,,uticn 'i;attcrr~ of rcc~~1t ~rt-:..~~Lke occurrer..c:e to zones oi structur:ll d.ci.or~.:!:tion oi t...e caru1 's c:nist. i~ith
'tl1e exception cf tl1e :i~: ; :.:ictriu faults, ti*cre b1ve bCCll. virtually no reccr~J. t.i.irect as:;ociatic:-15 oi i..o*lem can.--.::r:~es witil il*divi~lli.ll surface :i~ci. 'tS in tnc E:istem* U. S. -.ln~Tcfc~,
tl1c seist..otc-ctanic ;,.rrovi:1c~s v.;irtrayeil on t::i.is i:.:l:> cai"l CJe used :i..~ ~te ~t as~t:l!:i.wru rei~rence for ~...:.n:*os~ oi c.::t£:ir.:Uii.ir.~
the lc-c:itil:l~1 of t:.i.e Safe S~i<.itcir..&i t..:ltt~u=.i~o- l.,ursU:LJ.t to I'fipenc.ix A, lU CFR Part !JO, 11Seisr.uc an.i ~o.i.c::;ic Si ti.i-ig Criteria for Nuclear i-'cr:-:..:ir Plants."
Zones of e:irthqu::lke occu~ca whic..'1 car~"lot be related to any :..:r.cx*rn gcolo$iC s-cr~tural J:.*:ltt~r~ J.rc ~so .rx>rt1-:iyc:d on the r..ap. A.lt:i10\lt,Jl *ci1c Siti.i1:, Criteria 'ua .iiO'i: sl:.ccifically require con.si<..~i::ra~iG1 o.c suc..1 zc*nes, t.1e ~-atterns i;,a.y lc:;iolly be considered to re1;.resent <.icet>lY buried :ind. unknown st:r.icr..ircs.
11l.e seisri..icity data have been carefully screened to rCl"':.0ve questionable reports of events a.'1d 'icrlCIWil nOil*toctanic events.
'ihe reliability of rec..i.1ncncc :bior.::a:tion is f~.*rther enhar..ced by the exclusion of aitershocks, ti1e large nt:Jber of w~1ich i ..
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- L. Rogers, Director
- in t.'-ic historic record provide a statistical bias, and by the exclusion of events prior to t.1.e yca.r 1300 wi1ea many earthquakes r.:ay have gone unreportei.l because o:f the low population density. Tne mz:!ber of events used in preparation of the map is approximately 4000.
The Division of Reactor Research and Ievelorimcnt nrovidal support for t.'"lis research t;1.rou&.out its coUrse. 'ro~ra."";srM!tic responsibility for t;*1e effort was transferred to tile Livision
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~,.. of f;.eactor &:.fety F.esearcn ourin~ FY-7.+, along with that for
.... tile other USGS r~s.:arch pro ..~.s i."1 nuclc~r facility siti."'lg *
- .t* Person.'lel of t11e :forr.:er Seis:::-.ology Division were trmA.Sfcrred from ~~O:\A to the CSGS Juri.:.1g FY-74, so ti1at t.1.e fir~ product
.~.~~* . will appear as a puolication of the LSGS
- A drc.ft COl-1' of t.11c r:-:ap and report was tra."lSmi tted sir::iul.taneou.c;ly to RSR and the 1Jir1,;ctorat!l 0£ Ll.cc:.1Sir1s c~1 1.;.:iy ZO, 1974. TI1e USG.5 will o~cn- fil~ the apprc*;ed versions wi titi.n tl10 next two months, at li:~1id* tir..c ti.'le: irrforr..:itio.i n*ill be r.vailsble to the. pul.Jlic. EeC'luse of the anticii;atcd C:C:-..and for th.c map, the USGS inte."'lc'~ to issue it, proi:)aiJly at a r:.!ciuccc. sc:a.le, as a :.iiscellanco-..-s Fieici Stuciy duri."le Fl- 75:
- H. J. C. Kouts, .Li'irector
., . Division of Rc:actor Safety P.cscarc:..'1 cc: J. :.1. Hendrie, Ueputy Director for Tecii:iical i-:Cview, L S. Hanauer, Li rector Of£ice of Tcc.1lucal .Advisor H. Denton, ;\ssist~1t Director for Site Safety, L
...j."*'...*. R. G. Sr..it.i1, Assistant Director for Research, HS R. Fraley, ACliS (5 copies)