41
I..'@.
5 WAY 1063
                                         A.
:@WRDP964VJ 500@36080
/4@UR For F%pase 200/1ffA6 197ROO
                                                       70W
m3/62/002/006/M
         S/
A160/A1O1
9/
      Mi'shih, V. M., Nayden'Ova, N- Ya., Platonov, M. L.
'AUTHORS:@
bability 0
      The diurn 1 variation of the pro fthe appearance of the
TITLE: a
                 ods and the ends of magnetic storms
commencements, the active peri
PERIODICAL: Geomagnetizm i aeronomiya, v. 2, no. 6, 196@p 1107 1i12.
TEXT: The authors investigate the probabi:lity of the appearance of the-
commencements, the active periods and the ends of magnetic storms on the basis
of@the Irkutsk Storms Catalog for 1905 - 1917 and 1925 1959. The catalog
       A total of 539 of them are storms with a gradual commence.- i
describes 820 storms.
ment. Figure 1 presdnts the curver. SH6 (nb),@San (ap),-and Sa for Irkutsk. Or-
dinates,in durvel represent the frequencies of the commencement of the G-storms'
nnb, in curve 2 - the frequencies of the active hours napil and incurve 3 -,the
ly
equivalent amplitudes R Similar distinctions between Sa,and Snb were also.
observed at all 6ther stations, These data, characterizing the phases oi:the
maximum of the'first harmonic of Sa and Snb, araWesented in a table, The
authors explain these.,results.by proposing that.snb may,be,considered as'a re-
Card i/3
       S/2O3/6P_/OOP_/OO6/010/026.-
The diurnal variation of the...,7
       !A160/A1O1
sult of Sa.
It is followed that the p
    robability of a'cbntact of the corpuscular,
flux with the Earth does not def5end on the time Of the day. This-concludion is.
..:,confirmed by the fact that, according to the mentioned catalog, the diurnal
variation of the frequency of sc practically does notpexist. The authors then
investigate the total of all st9m days and introduce,,the following'four hypo-
theqes..:'.j) The probability that there is a contact between Ithe flux and-the
I..Earthj..causing the storm is equal-for all hours of a day. 2) The magnetic ac-
tivity duringthe hour of the commencement of the storm A is not lower than:that
during an average.storm T : A
       3) The values,of A during the initial hours
Of the atoms are determined by Sa on the basis Of the perturbed days,, 4) The,
length of each atom is :?
       -12 hours. The distribution Of the probabilities f
0
the dommencement,of the storms ovor the hours of the,day P (T) will bea6 f.
1: lOwss P 0 in two 6 -hour. inter@rals T 4- ak 900 and'T > 06k + 900 (Figure -21''
>
(I 1Xk + 900 750,4 ='l 24
ha@ching),..p . 1/24.in the 11 -hour Aterval
       O&k .3/
in one hour containing the momen't'T =o6 - goo. Sucb'@
              k - k a distribution of :the
ty P (T), has the f orm, of ' a try
probabili -square shown On!Figure 2, The @authpl@s
1) It was dAemined that the -commencements. of
make the following conclusions.
the atoms, (recorded at-the givpn,@stati6n)' are generalljk shifted to the side iof
Ca@rd
         .2/3
The diurnal variation Of the...
         8/203/6Voo2/oo6/010/020
delay A1601Alo!
as regards the mom
Inequality of t of the contact of the flux with the E
'rnb
G-storms have a .<Ckb mas@r eexplained by the fact that th arth. 2). The,
-shook front
        3) The main result of e fluxes causing'the:
@,,ilen Of the clearly-ex-preas d variations s
explaining the, thi's work iff the description
kb" and the Possibility of
          e variations as aresult of nb and S
S
OCIATIONt Institut zemn6go maglietiz' Sa. There are 4 figures,. and 1 table,
ma
iOnOefery i rasprOstraneniya-'

So AN SSSR (Institute Of Terrestrial radlovoln,;
Wave Prop
agation of So, Magnetism, tonosphe
        AS-USSR) re and, Radi o, -
S"a'ITTED June @3, 1962
Figtre 1.' It
                         Figure, 2.
goo
                                   -J
49
Card 3/3,
Ap Rel ase 000600130080J
proved For Rol ase /03/.26: CIA RDP96,'-00'7-87R
r

  FIRM NO. I CATION U11C I PROCESSING DATE iI
  FI,R
  AW164(m 1'e'@S42001/03/vw M@FEA-0078)kft-00@30@*Aa _JMG
  CODE ICOUNTRY PS AF CIIARTJ ACTIVITY CODES
       4 1 USSR 11-31 1
  L
  LOCATIOr$.,,. S/T NAME OF INSTALWTION PL. NO.
  LLP, ry S
  DATE/INFO DATE/SOURC PF
  DA mo YR DA No YR
       CONTROL NO. SOURCE CIA OU--a-16-1-1i- EVAL
  -26 DEC 61- SCIENTIFIC INTELLIGENCE RESEARCH AID
  PRINCIPAL RADIOTELESCOPES Or, TEE..SOVIET UNION
  immsK sOLAR STATTCH
  Alternate NWO: Laboratory for Solar Study
  Subordinate to: institute of Terrestrial Magnetism.* Ionosphere,
  and Radi-owave Propagation, Moscow. In 1959
  subordinate to the Irkutsk UnOsphere-VR@gnetic
  Station of the Ministry of COMmInicatiOns
  Location; Mept, near Irkutakp RSFSR
  52v 281 N- 1040 02' E
  pmetional Description
  Tech,,aicaj Description
  Personalities
  other Information
  Approved For Release 001/03/26 CIA-RDP96-00787ROO0500130080-7
  FORM
  12-60 326 USE PREVIOUS EDITIONS. (20)

  

      For Release 2001/03/2 RDP96-00787RO00500@@OJW410
      AID Report 61-69 31 May 1961
      PHENOMENA IN THE UPPER ATMOSPHERE
      REVIEW OF SOVIET LITERATURE
      AID Work Assignment No. 3
      Report 13
      Sclenas
      A And Te,h_,,Ology S
      Approved For Re erasV586Ttft26:Eal~~0787ROO0500130080-7

               SUBJECT: Hor4-hly Report - AnWork Asal-nment Noa,,3
          Approved For Re4&ase 2001/03/26 : CIA-RDP96-OOWROO0500130080-7
          PERIOD,% May 1961
               This is the thirteenth in a monthly
          report series reviewing Soviet developments
          in astrophysiox and geophysios. Beginning
          with this report the series identifloation
          is ohanged to read AID Work Assignment No.
          3,, replaoing the previous ftaignation Pro-
          jeat 521007, Task 3,, The report is based
          on materials reoeived at the Air Information
          Division in May.
               Materials in this report deal with the
          following topiosi
               II. Solar radiation and the ionosphere
          III. Van Allen belts and cosmic rays
          IV. Telluria currents
                            V. Atmospheric electricity
                          VII. Satellite and missile data
          Approved For Release 2001/03/26 : CIA-RDP96-00787ROO0500130080-7

          
                                                     tio'
    Influenced not,4h1_@\t1-,e value f the earth curr va ations, but
                 f the ea va :1a
    their airzRdhaase 2aft/ e RDM&
      1P
    A, '@o n @ac h
    u rent f a st ther ore b
    r
    eartk current fieldTaa a reg onal ch racter m t ther fore b
    roex4mined,
    ain;7d
    Gruz
    exte
    tall
    show
    stud
    dire
    of t I
         ara@eter
    a
    M
    skiy@
    measuZents
    Kvesh
    In 1956
    nakaya lighway
    ded alow
    no rocki
    d the I
    so conflrmed
    tion of
    e foldirg
    wai!
    tali, Pipanauri
    work wa
    Ud
    the Sirami-Dz
    of the
         componint
    thi
    the tel
         of thA
    noted
         concen
    in t
              Dzirull
         to p
         exiote
         uric cu
         Caucas
         n the r
    and ah
    ranite massif Tamaris
    Oade in the Kar
    ,
         e ents
    me ements
     u
    or on
    (P or on
    fI nclus
              hko'mn luo
         In th value
         value
    c )
    rocks ro

    Wro
    rye ta
        in
    of crys ine
         IS Muguti)
    t points
    the veiy
    no madi
    of the
    h the supface,,
    rocks.
         com
    near
    massi
         to the
    telluro
     rated al ng two :outes,
    1
    e Kartli skaya p,ain.
    I
    rula hi way immidiately
    kly mass f. Cor:elation
    d8i
    ay the d minant :ole.
    ee of an approxiiately
    rents, c)rresponling
    s range. A high
    gion of retaceols
    lea (Kre tovyy p,
    tPe
    T,,
         M.
     L
    to 'the
    value of
    limes-tones
    reval).
    Voyedno-
    route was
    n the crys-
    f results
    0
    so the 1956
    itudin 1
         direction
    the telluro-
    The Darial'-
    Tsikhe) howed a,hlr va ue. Th
    liyokaya plain 0 edzhvri khevi,
    letely c nfirm the data f 1955, and
    uteroppi go of tle cryst lline m sif
    (Rikoti Khavi,.Vertkvi'Chala) n-
         ffe t therf 4arp in ass
    t
       t'ramectterts the c1pos; theakcrys ta In*
    lp@th
    r in meas menys made on\,outcr pinge
                                                         The investigations showed that it is possible to study the
    h
                                                  b
    0
                                              t
    h
    d
    me
          r

    j;o ical structu Ith the tolluric current method,, h by
    u
           r
    a
    c
                                                0
    f
    r
    m
                                r
    t
                                      h
    0
    sh rt riod vari tio and by data n he daily mare of ria-
                                 n
    a
                t
    0
    d
    I
    v
    a
    y
    'a er
    r '.u
                                                     0
    0
    u
    d
                                             a
    c
                                        r
    Pa
                               t one. The latt r met od is prefe red. Particularl good u4li-
    fe
    r
                    e
    d
    t
                  I g
    m
               r
    e
    pro
            Y
    a
            t
    t
    I
    t
    3
    u
                                                                                    t
                                        a ru
                                         r
    e
    a
                                     t
    t tkve results , y be btained In nvesti ating stru tures soon-
    i
                   n
    e
                 b
    01 lu
                              le
    1@ r

    0
                                                u
    .t
    0
                                                     d
    n
    n
                                      d
    a
                    t
    v
    a
                              e
    ing he Kartl@yskaya plain, i,.e . relat vely good, onduct ng
    a
           tl
    k
    r
                   g
    y
                                             fg(
    @Em t p
                                       a
    t
    t
                                    e
    0
                            P
    a
    ta
                             ocke nderlai@/!by hi -resistan e fromhat one, The matter f ob-
    an
            I
    in
                h
    y
                 e fon h nd de h
    a
    ainin accura 6 quant tative da a on t 0 thickness and dep ho of
    da
                    a
    t
                a
    n
    qu
    ds o a give geolog c formati n is qui e diffic lt and r quiree
    1; ol og ti I ui c and r q
    jv@e e a n
    em `tjc Inv ion q 0 ffi lt u.
    urth# system tic investigation .
                                                 is 0 nd and he
    Co ent; -The motiod used y the au ore is ound and he
                         The met d the au 0' u
                   I prove a b IIity of a yj g the te 11 ri@
    soults obtai d prove a fea bi'. lity of applyi g the tall ric
    to as 010 pe cting ot be used r
    urrent eth to geoloZic pr pecting. ca ot be used r
         2.) Vinogradov, P. A. Diurnal distribution of steady short
    period oscillations of the terrestrial electric field accord-
    ing to observations at the Tizur station (Lake Baykal). IN:
    Akademiya nauk Gruzinokoy SSR, Tiflis. Institut geofiziki.
    Trudy, v. 18, 1960p 43-52. Q1500.A55
    Approved For Release 2001/03/26 : CIA-RDP96-00787ROO0500130080-7
    no

        ApOrMynd, 10AFk4poelMl 10M&tQAW99fift-00WFAQM&1 ZQQWjn
        of the Scientific Research Instit-412-of Terrestrial HasneTlom$
        -the'ronospnere, -and Hadlo Wave Propagation
             A station was set up on 011khon Islan. T_a1r,& jalykal to make
        uninterrupted recordings OT-s-hort period r (steady) on-c-i-l-la-tions
        in the terrestrial electric field using equipment with a sensitivity
        (0.02 mv/km/mm) higher than had hitherto been possible. It was
        thus possible to record Po oscillations of a very small Intensity,
        The statlon operated constantly from 10 Sep 1955 to 17 May 1957.
        The length of the east-west pickup line was 1000 m, while the
        north-mouth line was 500 m. The observational data obtained,
        chiefly on the daily distribution of Pc oscillations, provided in-
        formation on the characteristics of short-period oscillations, the
        terrestrial electric field, and the Influence of the screening
        properties of the ionosphere.
             Of 322 days examined 288 (89.5%) had ?a oscillations. The
        minimum number of days without to oscillations was noted In March
        and September, while the greatest number occurred in February and
        July. Daily to distribution has the highly pronounced form of a
        simple wave with a daytime maximum and a nighttime minimum. A
        slight shift in the time of onset of extremal values from winter
        to summer was observed. In winter the greatest number of steady
        oscillations are observed at 14-1500 hours, while in summer, at
        12-1300 hourslv@pal time. The amplitude of the daily Pc curve
        during the equinoctial periods is somewhat smaller than at other
        times of the year. The Pe excitation frequency in the period of
        least development (00-0300 houre,local time) is about three times
        lose than the frequency of appearance in the period of maximum do-
        velopuent of these oscillations (11-1500 hours.. local time). Com-
        parison of Pe distribution curves according to the value of the
        period shows that In the equinoctial months the predominance of
        Pc recurrence with a period of 20-30 see over to with other periods
        is noticeably higher than at other seasons of the year. Results
        did not resolve the question as to whether the short period oscil-
        lations are excited simultaneously throughout the world (a view
        hold by V. A. Troitskaya) or whether they occur according to local
        tin* (the view of R. A. Zevakina and V. V. Kebuladz*). In some
        cases thq Uzur station reported Pe excitation time to occur at
        Intervals established by Troitakaya, while in other cases the axw
        citation was connected with local time.
             The Uzur station could find no direct relationship between
        the daily distribution of the frequency of Fe appearance and the
        screening of the earth's surface by the ionosphere, since the
        most intense Pc and most,frequent short period oscillations are
        observed at hours when the greatest screening action of the Ionom-
        ph* rAp p#8V@64JdWLiW& Ftog 0 4 Tftggs@ 3C MljKq@p§ 6 _W70Rd4ffWj W0
        j

        

         latter sh 1
         t&W *eSb J,4,$j&_4eM1R12
         0 served SIMUltaneou ly over large areas
         and that their excitation it connected with upper atmospheric
         processes.
              In the Summer of 1955 simultaneous recordings of short period
         oscillations were made in Zuy and on Ushkaniy Island. Processing
         of the records by the conjugate ellipse method showed a sufficiently
         steady relationship between Fc components in the form:
         u - ax + by, v - ex + dy
         where x and y are the Pa components on Bol'shoy TJshkaniy Island and
         u and v are the Pa components in,ZZuy. Comparison shom-e hat the
         Pa amplitude on Ushkaniy is about 12-25 times greater than the am-
         plitude of the same oscillation in Zuy. In oases when almost total
         Pa attenuation Is observed, the traces on the Ushkanly recorde dis-
         appear somewhat later and appear earlier, than in Zuy, but sharply
         pronounced Pa withIn the limits of measurement accuracy are excited
         simultaneously. These Pa excitation characteristics are, apparently,
         determined by the location of Ushkaniy Island and Its geologic struc-
         ture. The thickness of the sedimentary sequences In Zuy exceeds
         1000 m, while Ushkaniy Island In composed of metamorphic Precambrian
         rocks, The recurrence of certain types of oscillations in the name
         hours of several days was detected in the Pc records. Thus, for
         example, from I Apr through 10 Apr 1952 intensive Pa. having about
         the same regime at the same tIme of the day,. were observed. Theme
         oscillations were connected w4th a very stable and geophysically
         active region of the sun ob$erved at that time.
              A sharp Pa increase after the commencement of geoelectr1c
         field atoms Is sometimes observed. This ?c intensity Increase is
         particularly noticoable when the commencement of the storm occurs
         during hours of weak Pa development. Another characteristic of Pa
         excitation, connected with terrestrial electromagnetic storms and
         auroras, is the broadening of the spectrum of short period oacilla-
         t1ons during the phenomena. It Is noted that on quiet days chiefly
         Pa with a period from 10 to 3Q-40 and more seconds are observed,
         while during auroras, oacillapiona with a period from 1 to 60-70
         and more seconds are observed, Of all oscillations of the indicated
         spectrum those with a period of about 1-2 see are particularly
         evident- oscillations with a period of about 2 sec occur more ortan
         than oscillations with a period of about I sec. An almost oomtlete
         constancy of the period for the entire Interval is characteris ic
         of oscillations of both groups.
              Comment, Vinogradov's investigation of the steady tellurle
         current oselilations and the dependence of their amplitudes upon
         Approved For Release 2001103126 CIA-RDP96-00787ROO0500130080-7
         - 25

         

     the seasons is of imnort. The data obta d
     SeojAyjxow_6dTftriPWlVa ftR9OdA%&U
     tUde of oscillations. The character of oscillations can be used
     an a means for studying the ground composition.
       3.) buladze, V. V., and A. S. khi. Result f investi a
     @V' e l'-_
     t a Of t ic current ma :de 1957 at h sheti 1@
     tro llu c sta. n. I Akadem nau Gruzin oy S @Rl.
       J
     TIM Institut ziki. Trudy, 18, 196o, 0.
     QE50O.A55
     Continuous round-the-clo cordings of telluric cur nt
     tions have been conduc d at e Dusheti station fro the
     autu of 1947 to 1 Jul I omutu ly perpendicular erground
     -lines w h a recording a ed of 20 and 0 mm/hr. In e spring of
     1957 the idting pick lines ere reco tructed a new equipment
     cord
     introduced record ariations at three r es'. etailed descrip-
     tion is provi of he lines a d electrodes, th 80 mm/hr record-
     ing equipment P arth current variations, th 20 mm/hr equipment,
     and the 30 mm/m ecording equi,ment for sh t riod variations.
          The 1957/telluro ams were rocessed ith the m of studying
     the daily "lar march o the ear h cutr t potential adlents and
     of inves@qating the ques on ofithe - riodicity of pro acted
     Slectro elluric disturban Ina tion, since 1 Jul 7 Inde-
     t e' in' Vdcet cr 0 @
                         pende ly flowing bay-oha c: d of ahces with and without ulea-
     p
     io a
          tio sudden commencement die ances, separated impulses, rains
     08
          oscillations and short peri scillatione of a,etable reg. e
     ftre studied. The methodolo 0 rotessing observational e ale
     described in detail else ere (T dy Instituta geofizik AN OSSRp
     T. 2t 1953). After taki the rdin tea from the 20 mm r telluro-
     gram monthly tables of he mea hour gradients of ential for
     the EW nd WS componen were co piled, en hourly v ues of the
     daily ma h in mv we calculate . and on e basis f these data
     the dai ly a lar m' ch according o month, se on and yearly mean
     were deduced A lysis of this terial produ a curve of the
     mean yearly @a -solar march ol the EW compo n similar to curves
     obtained in 1 8 6. The mean arly daily arch the EW com-
     ponent is a/ ouble ave with ba c maxima tween 8- 00 and
     16-1800 ho I
     gre, and ic minima@Detween -0700 and 1 500 hours
     local me solar time. The aMP4 tudes the daily mar in the
     summer nd equinoctial nths c side ly exceed the am - tudes
     of th winter months. dail mar curve of the NS co nent
     is v y weakly expressed. he m an yearly hodograph of the ri-
     zon al component extends lat tud n Ily, Indicating a predom! ce
     0 latitudinal currents in t ion of the electrotelluric
     M.ation.
     Approved For Release 2001/03/26 CIA-RDP96-00787ROO0500130080-7
     - 26

          froO.V49V*ral
          ly
               da,! bles. of
          @b
               evaluat
          by c pil
                    Ing
               Hour y value
               y
                    banc a and q
               q
               a ej
               a
          of f mor ye rs.
          r
               18-2 00 hou a.
          0
          r'egaz
          dist-Lotdo
          in th non
                    mon
               ac tiv 1
               Ity I
               ' is
          @er of Is
          f
          period
               d
          t
               ;one ac@ording
          ca talig
               of max,mal
          lot day@.
               A
          and,@.nimal
          ar I
          Y*
          a of th
          1957 wa
          rbed ho
          d avera
               9_n_21O_%W342Q*d
          several da
                    ralues of t max
               to -poin
               of *lee rotell
                    ampli udes w
               Curve were f
               kaoximal n mber of
               f m 03 _06
          march c rve of 1
          place I the equ
          summer nd.winte
          consid rably his'
               in 957 was 12
          d 0 per year.
          I ta
          Cjtalog data howithe
          , @a
          pla e n the equ octi@l
          qu
          @o
          dis@urbances to plae@
          a ]p
          abs nt In June, and
              nd
          0 1 C Orr
          pro easing and correl
          at
               ma be drawn. I
          Y
                                                08
                                        h es i;t
               'g: Th
          months,
               -
          '@n
          In Dece er an
               m ez
          or
          Septembe only
          tions are nocess
          6@

          

               1PURroo
          . d7lWA%%@Q%13 0 qj
          I
          a studl4,,, b _t llin
          0 mo
          y
          51 var! Mon
          1 1-tb a
               u
          Mal amplitu 5 0 atio
          d a
            Xcha 0
          ct
          cter4tice, a d
          hourly cha
          d n
          ric atoms d die rubance
          I
                      c
          me
               te determ 'Ain d for oth die ur-
          r
          I
          =In d f d
               und to be alogou with oa*
          00 alo ou h n
               4
          disturbed ours o curred rom
          .01 ours 0 d r
               n I ver jac I
          0 hours, niversa time. In
          ea e f
               r t a u f
          57, the reatest umber
               on the nd *a
          noctial onths, nd the east
          ot
                                     solati e. Elect otollu c
                                          Sloc
          INT- tha,4 in 1948-@6. Tb4 num-
          &:-13(X, while in the jearlier
          t
          u
               rb
          d
                                     @:j%yadlsturb c
                                          tl n
               t numb O;BbAols@
          b
               m
          S?ed
          rjau
           .
          'a 0
          e
               5
          t.
          jAugust. ey are dMplo ely
          d",
          ell
          r
          a was rec ded. rther
          ec
          )fore Inal I
               y before Inal con luslons
          L/ga 0 t
               on re 1,
          ltvootiga on relates to s
          h@o
          tr of tel
               1ho mar of telluri currents
          a it I
          insofar a it shows the march
                            ent a
          u
          Comment Altholgh th: au hors'
          I tr a a t
               ited ar a nly,t1d ch ra terizes
          at t one oint, _; of I erest
          0 1 a
               U
          of t o to uric curreNn eta throughou
          ur

          

          @t4 t
               4.) Vinogradov, P. A. Changes in the potential gradient of the
          electrotelluric field at different depths of Lake Baykalo
          IN: Akademiya ilauk SSSR Bazkallskaya limnoloxicheskaya
          .8tantalya. Trudy, v. 18: 1*960, 350-392. DK771.B3Alb
               The equipment used In the Lake Baykal region from 20 Feb
          through I Apr 1955 to make continuous recordings of the variation
          of the potential gradient of the olectrotelluric field consisted
          of a photogalvanograph and five pick-up lines, thve* of which lay
          in-an'east-west direction and two in a north-Isouth direction. The
          electrodes of the eastern lines were submerged to depths of 5.t2OO,
          and 1,100 x; those of-the northern line to depths of 5 and 400 m.
          All electrodes in the same direction were in a single vertical
          plane. 0.4 ml lead plates served as electrodes. Each line was
          500 M long. 11CM wire was used to link the electrodes to the re-
          cording equipment. The Insulation resistance for the lines ex-
          ceeded 10 mg ohm/km. Properly shunted self-leveling mirror gal-
          vanometers operated in the regime of critical damping., Periodic
          measurements of the ground resistance of the electrodes showed a
          constant 170 ohm during all observations. Oscillograph recordings
          Approved For Release 2001/03/26 : CIA-RDP96-00787ROO0500130080-7,,
          07 -

          

      were made at rates of 4. 10, 20, and 90 cm/hr. Simultaneous re- ,
      a" bWJA
      09P jtPk6-169,Pe@ftj3hVPC1A? kbbM e
      Fi69ADJPn 0 7 a Ia UpermVent
                an the de 0 e lympee near e town o
      operated In Zuy.
      on
           Two types of short period osaillktions, differing from each
      other by the nature of their oscillatory resimep are distinguished.
      T7pe 1. one* begun, continue for hours, ithile T%2 are observed
      in groups or trains of from 1-10 oscillations. e 1 may be
      turther divided into 3 forms as followet 1) complex harmonic
      short period oscillations, the amplitude and period of which change
      lrregularl7j 2) sinueoidal short period oscillations, the amplitude
      of whith changes irregularly, but which are more stable than Form Ij
      the period remains almost constant for several tons of years; and
      3) sinusoidal short period oscillation, the oscillatory process of
      which consists of separate packets, containing from 3 to 10 and more
      oscillations, the amplitude of which after a smooth increase to
      about the center of the packet gradually lessens. Analysis of elec-
      trograms shows that most often Form 2 oscillations are excited, and
      only very rarely the packet form. The difference in the nature of
      the flow of these oscillations is, apparently, connected with modi-
      ficatidne in the factors causing them.
           The following conclusions are *ad* from the obsorvationsi
      1) Short period Type I and Type 2 oscillations an wall an bay-
      shaped disturbances of the electrotelluric field at different
      depths of Lake Baykal and on land ('9W.Y) are, within the limits of
      measurement accuracy, excited simultaneously, coincide completely
      in their parallel,march, and have a similar period. Because of the
      complete similarity (with the exception of amplitude) of all the
      oscillations and impulses, the oscillatory regime of the electro-
      tellurie field at different depths in Lake Baykal and on land has
      the same character. 2) The amplitudes of Type I and Type 2 oscil-
      lations and of the bay-shaped disturbances in Baykal and Zuy cor-
      respond to the electrical resistance of the medium of these points,
      3) A slight lessening of amplitude with depth was detected In
      Typel and 2 oscillations. The value of the attenuation,, computed
      from rhe observational materials, is in agreement with the value
      of attenuation obtained from examination of the absorbing effect
      of Baykal's waters on the variable electrotelluric field. 4) Local
      electric currents, connected with the water currents in Baykal,
      were detected. The change in the potential of the field of these
      currents represents a series of uneven oscillations with a period
      of 2-7 see and an amplitude of 0.1-0.8 mv/km. 5) Type 1 short
      period oscillations in both Zuy and Baykal are excited chiefly in
      the interval from 00-1200 hours, while Type 2 occur from 12-2400
      hours, universal time. The greatest recurrence of bay-shaped dis-
      turbances occurs during nocturnal hours.
      Approved For Release 2001/03/26 CIA-RDP96-00787ROO0500130080-7
      - 28

      
          Appgved For Release 2001/03/26 : CIA-RDP96-00787ROO0500130080-7
               I ommentt The results obtained by the author are interestink'
          ins;far as.they sho- ',he character of telluric rrent oscillations
          as dependent upon thY earth's rotation and thel9dium th3@ough whiab
          the current passes.
          Approved For Release 2001/03/2Q29CIA-RDP96-00787ROO0500130080-7