PRIORITY Approved For Release 2004 11 30 CIA-RDP78M02660R000800070028-4 13 February 1976 TO 25X1 Mr Kempton Jenkins Congressional Relations Department of State 632-23436 FROMI Deputy Legislative Counsel I Central Intelligence Agency 25X1 Approved For Release 2004 11 30 CIA-RDP78M02660R000800070028-4 Approved For Release 2004 ct tlJ f -RDP78M02660R00080007002'8-'4- i _ i g 10 February 1975 MOSCOW SIGNAL ACTIVI1Y The Soviets have been irradiating the U S Fmbas sy r roscow for more than 20 years The purpose of this irradiation has never been understood Approximately a decade ago medical research was iris ti tuted to detennine nether the signals were hannful research did not produce significant indications That of hazard Signal strengths from their inception until May of 1975 were very low - below the Soviet standard of 0 01 milliwatts per sq on for an 8 hour day and therefore much less than the generally used 10 0 mW per sq cm industrial standard established in the U S In May 1975 a new much stronger sign al was detected Though previous signals had not been considered a health hazard the State Departn ent felt that a possible hazard now existed As a result a medical scientist who had been following Soviet research in this area was dispatched to Moscow in July to make an on-site investigation His finding was that current medical research did not permit stating unequivocally that no hazard existed but it did indicate that the probability was very low that a hazard existed from the levels then measured 0 01 mW per sq an for 8 to 10 hours per day During the next several months there were several changes in signal characteristics A second signal of similar characteristics to tJ1e first and an increase in signal dura tion to 19 to 20 hours per Approved For Release 2004 11 30 CIA-RDP78M02660R000800070028-4 JI - - - £ Approved For Release 2004 b A-RDP78M02660R000800070028-4 day were noted to Moscow As a result the medical scientist was again dispatched This time he was accompanied by a physician with considerable experience in this area and an electronics e x-pert Their findings were that while the power densities to which e mbassy staff were being subjected were not substantially different from those observed earlier in the year the possibility of the existence of a health hazard was increased due to the increased e x-posure duration certain changes in signal characteristics and other medical considerations Based on the findings of this group the State Department instituted an effort to get the signal shut off and resolved to brief all embassy staff on the health hazard possibilities 2 Approved For Release 2004 11 30 CIA-RDP78M02660R000800070028-4 l t ir i'