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January la, 1978 P.O. DOX 3951 Cl!ARLOTTESVILLE, VIICINIA 2290:
(80a)293-6039
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Ftr. Iron llei t er, Seismologi'st (717 J533.-704 or Geosciences !! ranch Division o f Si te Sa fety anul 1:nvironmental Analysis U.S. Nuc l ea r itegis la t ory Commi ssi on
%ashington, D.
C.
20W3
Dear bir. Itei t e r:
The North Anna Environmental Coalition rec;pectfully requests that you answer the foilowing questions at your earlient convenience:
(Re lleiter Af fidavi t of July 13, 1977) 1.
% hat work isthe Geosciences liranch doing to determine why "there is more act ivity (micro-seismic) along the lake shores" at North Anna?
You write ttjat "there is no evidence that micro-2.
carthquakOf t AMurring elsewhere along Acuschel's lineament," and argue against its being seismically active.
Does not the cluster of 16 micro-earth-8 quakes strongly suggest that at the point where the lineament intersects the lake, it has been activated by the weight of the water?
3 Do you agree with seismologist Seth Coplan that fault lubrication and reactivation is not a function of fault age?
Given that, does not the
" historical" record of activity along Neuschel's lineament bi'come irrelevant in terms of assessing the current water-induced activity?
1 When you st ate that carthquake activity at North 1
Anna "is not a t a ll regionally anomalous," what in the source of your data for the comparison?
If " Jack of instrumentation" has deprived you of base-line figures, and micro-earthquake monitoring installations einenhore are rare, how did you ar-rive at a standard of what was " regionally anom-alous" or regionally normal?
5.
Where else in Virginia have you found comparable clusters of la6 micro-carthquakes?
6.
bhore in the seinmological li t e ra t u re a re there examples of 30-year seismic predictions succesn-fully made on the banis of 3 years of micro-seismic monitoring?
7
% hat is the upper limit registered by the network?
What was the date or daten of the two carthquaken in the cluster which regintes ed a magnittulo of greater than 27 Thank you for your professional assintance.
G500220520 850722 POR FOIA DELLOS-363 PDR June A Ilen President, NAF.C cc th p..lohn Slens Sen. Gary llart
[h? ORTH ANNq ENViRONMENML COALMO)
Janua ry la, 1978 P.O. BOX 3951 CilARLOTTESVILLE, VIRGINIA 229 Mr. lxon Heiter, Seismologist (71?J533-7694 or (80 e)293-60:
f Geosciences 11 ranch Division of Site Safety and Environmental Analysis U.S. Nuclear llegulatory Commission Washington, D. C.
20555
Dear Mr. Ileiter:
The North Anna Environmental Coalition respectfully requests that you answer the following questions at your earliest convenience:
i (He Reiter Af fidavit of July 13, 1977) 1.
What work is the Geosciences Branch doing to determine why "there is more activity (micro-seismic) along the lake shores" at North Anna?
l 2.
You write ttgat "there is no evidence that micro-carthquakO215"Neurring elsewhere along ficuschel's lineament," and argue against its being seismically active.
Does not the cluster.of 16 micro-earth-6 l
quakes strongly suggest that at the point whero the lineament intersects the lake, it has been activated by the weight of the water?
3 Do you agree with seismologist Seth Coplan that fault lubrication and reactivation is not a function of fault age? Given that, does not the L
l
" historical" record of activity along Neuschel's lineament become irrelevant in terms of assessing i
the current water-induced activity?
f 1
When you state that earthquake activity at North 1
l Anna "is not a t all regionally anomalous," what I
is the source of your data for the comparison?
l If " lack of instrumentation" has deprived you of I
base-line figures,and micro-earthquake monitoring j
installations elsewhere are rare, how did you ar-I rive at a standard of what was " regionally anom-I alous" or regionally normal?
5.
Where else in Virginia have you found comparable clusters of le6 micro-earthquakes?
6 Where in the seismological literature are there examples of 30-year seismic predictions success-fully made on the basis of 3 years of micro-seismic i
monitoring?
7 What is the upper limit registered by the network?
What was the date or dates of the two earthquakes in the cluster which registered a magnitude of greater than 2?
Thank you for your professional assistance.
- incerely, i sne A llen
- President, NAEC cc:
liep. John Moss Sen. Gary llart i