$BF|;~(J

$B>l=j(J

$B=P@J$B>>Ln!$4X8}!$Fs5\!$F#It!$B<>>!$=;!$LZED!$>kHx!$C]Be(J11$BL>(J

$B$=$NB>$N=P@J(J

$B;vL36I(J($B4\(J)

$B5D;v(J

1. $BBh(J29$B4|Bh#42sM};v2q5D;vO?$N3NG'(J

2. $B3F0Q0w2qJs9p(J

$B!L=nL3!M(J

• $BE>:\5v2D!'(J1$B7o(J
  $B5$>]8&5f%N!<%HBh(J130$B9f(J(1976)$B!$(Jp105-118$B!$(Jp114, Fig. 12$B!$(J¢J. Geophys. Res.$B!W(J $B$XE>:\!%(J
• $BJ?@.(J8$BG/EY3X9;K!?M$N3hF0>u67Ey$N%"%s%1!<%HD4::$N0MMj$X$N2sEz(J $B#97n(J11$BF|(J
• $B8e1gL>5AEy;HMQ0MMj$N>5G'!'(J4$B7o(J
  1. $B3$MNM}9)3X2qJ?@.(J9$BG/EY=)5(Bg2q$N6(;?(J
     $B3$MNM}9)3X2q $B9q:]J| $B9q:]J|l(J($B9-Eg;TCf6h(J)$B!$(J $B8e1gM=Dj5!4XEy!'2J3X5;=QD#!$J8It>J!$F|K\3X=Q2q5D!$(J($B $BBh(J5$B2s(J¢$B%"%8%"3X=Q2q5D!!!]2J3X $BF|K\3X=Q2q5D$BBh(J13$B2sKLJ}7w9q:]%7%s%]%8%&%`$N8e1g(J
     $B%*%[!=%D%/3$!&I93$8&5f%0%k!<%W!$9q:]3$MNJ*M}2J3X6(2q3$I9J,2J2q!$LfJL;T!$(J ($B
  2. ¢$B5$>]>pJsDs6!%7%9%F%`(J£$B$N2~A1!&6/2=7W2h$X$N0U8+!&=u8@Ey$N0MMj(J 10$B7n(J13$BF|(J
     ($B:b(J)$B5$>]6HL3;Y1g%;%s%?!<$h$j!%2sEzJ8=qAwIU!!(J10$B7n(J17$BF|!%(J
  3. $BJ?@.(J9$BG/EY(J¢$B8x1WK!?MD4::(J£$B$X$N2sEz;qNADs=P!!J8It>J3X=Q9q:]6I08(J 10$B7n(J13$BF|(J
     $B8x1WK!?MD4::I<5Z$SBeI=(J(2$BIt(J)$B!$(J $BJ?@.(J9$BG/EY8x1WK!?M3567D4::I<(J(1$BIt(J)$B!%(J
  4. $BBh;0r7oJQ99?==P=q$NDs=P(J 10$B7n(J14$BF|(J
     $BDj4|4F::$BBh(J32$B2s1'Ch6u4V2J3X(JCOSPAR$B2q5D$NAH?%0Q0w2q9=@.$H:#8e$NF|Dx$N7hDjDLCN(J
     $B5Z$SF1Am2q3+:E$N$?$a$N=`Hw!&1?1D$K4X$9$k9g0U=q$N $B!!F|K\3X=Q2q5D1'Ch6u4V8&5fO"Mm0Q0w2q0Q0wD9$h$j!%(J
  5. ¢$BBh(J1$B2sCOM}!&3X6(2qO"9g(J($B2>>N(J)$B=`Hw2q(J£$B=P@JJs9p$N $BCfIt;YIt!JK-665;=Q2J3XBg3X9)3XIt%(%3%m%8!<9)3X7O!!KLEDIRW"65l9g$KBg$-$J9-$,$j$r(J $BGX7J$K$9$k8z2L$r4k?^!%COM}$rBP>]$H$7$F$$$kCDBN$G$b4X$o$jJ}$N:9$,Bg$-$$!%(J $BJ?@.(J10$BG/#47n$NF|K\COM}3X2q$NA0F|!$H/B-=`Hw2q$r3+:E$NM=Dj!%(J
     $B!!5$>]3X2q>oG$M};v2q$NH=CG$O!$5DO@$N]3X2q$O9=@.CDBN$H$7$F$N;22C$OL5M}$@$,!$6(NOCDBN$H$7$F$J$iBP1~2DG=!%(J
  6. $BJ?@.(J10$BG/EY2J3X8&5fHqJd=u6b$N8xJgDLCN!!J8It>J3X=Q9q:]6ID9$h$j(J 10$B7n(J22$BF|(J
     $B!V8&5f@.2L8x3+H/I=(J(B)$B5Z$S8&5f@.2L8x3+H/I=(J(C)$B!W$NJ,Ln!%(J
     $B>e5-$N1~JgMWNN$r(J¢$B650i$HIa5Z(J£$B0Q0w2q5Z$S3F;YIt08$K0lIt$:$DAwIU!%(J
     $B!!1~JgBP>]$O!$F~>lNAL5NA$J$I$N>r7o$"$j!$K\It$N(J¢$B2F5(Bg3X(J£$B$O3:Ev$7$J$$!%(J
     $BDs=P4|4V!'J?@.(J9$BG/(J12$B7n(J3$BF|(J($B?e(J)$B!A(J12$B7n(J8$BF|(J($B7n(J)$B!%(J
  7. ¢$BMH;R9>5$CD(J£$B$H8@$&5$>]MQ8l$NBEEv@-$K4X$9$k>H2q!!5$>]D#$h$j(J 10$B7n(J29$BF|(J
     $B5$>]D#$O!$M=JsMQ8l$H$7$FCOL>$O8=CO$N8F$SJ}$K=>$&$H$NJ}?K$GBP=h$7$F$*$j!$(J $BJ?@.#9G/#77n$N8+D>$7$G(J¢$BMH;R9>(J£$B$O(J¢$BD99>(J£$B$H8F$V$3$H$K$7$?!%$3$l$K4XO"$7!$3X(J $B=QMQ8l=8$K5-:\$5$l$F$$$k(J¢$BMH;R9>5$CD(J£$B$NH2q$,$"$C$?!%(J
     $B!!3X2q$H$7$F$NBP1~!'8=:_!$MQ8l8!F$0Q0w2q$,@_CV$5$l$F$$$J$$$N$G!$EvLL$N(J $BBP1~:v$N0F$N:n@.$rM};v$K0MMj$7!$oG$M};v2q$G5DO@$9$k!%(J
  8. $BBh(J15$B2s(J¢$BIw9)3X%7%s%]%8%&%`(J£$BBh(J2$B2s1?1D0Q0w2qJs9p$N $B!!FbF#8<0l0Q0w$h$j!%(J
     $BF|K\Iw9)3X2q$N;vL36I$O4X783X2q$,;}$A2s$j$GC4Ev$7$F$$$k$,!$$3$N=j:_COEPO?(J $B$K$D$$$FF11?1D0Q0w2q$G5DO@$H$J$j!$K\3X2q$KBP$79M$(J}$N>H2q$,$"$C$?$,!$F|(J $BK\Iw9)3X2q$N=j:_CO$rEPO?$9$k$N$,E,Ev$H2sEz$9$k$3$H$K$J$C$?!%(J
  9. $B3X=Q>pJs%;%s%?! 1$BDL!!(J(11$B7n(J17$BF|8=:_(J23$BDL(J)$B!%(J
  10. ¢$B5$>]=8;o(J£$B0u:~6H $B#5¢$B%"%8%"3X=Q8rN.B%?J;v6H(J£$B$X$N;22C6(NO0MMj!!F|K\3X=Q6(NO:bCD$h$j(J 11$B7n#7F|(J
      $B$J$*!$JLES!$Bh#52s%"%8%"3X=Q2q5D$N8e1g$X$N6(NO0MMj$bTri-P$B%3!<%k%"%&%H%5!<%S%9$NMxMQ7@Ls2r=|DLCN!!(J12$B7n(J31$BF|IU$1$G(J 11$B7n(J10$BF|(J
      $B3X2q(JBBS$BGQ;_4XO"!%(J

$B!L2q7W!M(J

• 1997$BG/(J10$B7n$N<};YJs9p(J
• 1997$BG/3X2q=)5(Bg2q7h;;Js9p=q$N $B!LE75$!M(J
  • Vol. 44 No. 11(1997$BG/(J11$B7n9f(J)$B7G:\5-;v$H!$(J $BF1(JNo. 12$B$H(JVol. 45 No. 1$B9f7G:\M=Dj5-;v$N>R2p!%(J
  $B!L5$>]=8;o!M(J
  • Vol. 75 No. 6(1997$BG/(J12$B7n9f(J)$B7G:\5-;v(J
  • $B:G6a$N=8;o$N0zMQ7o?t$NJQ2=(J
  $B!L5$>]8&5f%N!<%H!M(J
  • 1997$BG/EY$NH/9T7W2h(J(189$B9f0J9_(J)$B$N>R2p(J
    189$B9f$O0u:~Cf!%$=$NB>$N?JD=>u67(J
  $B!L9V1i4k2h!M(J
  • 1998$BG/=U4|Bg2q2q>lMxMQ7W2h!&;Y=P7W2hEy(J
  $B!LAm9g7W2h!M(J
  • $BDj4>2~@5$K4X$9$kJ8It>J$H$N6(5D>u67!!!!(J$B!JBh#42sM};v2q5D;vO?;2>H!K(J
    11$B7n(J10$BF|!$J8It>J3X=Q9q:]6I3X=Q>pJs2]$rK,Ld$7!$Dj4>2~@5$K4X$9$k3X2qB&$N(J $B9M$(J}$r@bL@!%(J
    $BJ8It>J$H$7$F$O!$C`>r8!F$$7!$#1>r$K$D$-#2%v7nDxEYI,MW$@$,!$J?@.(J10$BG/$N3X(J $B2qAm2q$K$O4V$K9g$&$h$&$K6(NO$9$k$H$N2sEz$rF@$?!%(J
  $B!L650i$HIa5Z!M(J
  • $BBh(J32$B2s2F5(Bg3X$N4k2h!!%F!<%^8!F$Cf!%(J
  • $B3X9;2JL\!VCO3X!W4XO"3X2qO"Mm6(5D2qBh(J11$B2s2q9g$NJs9p(J
    1. $B3F3X2q$,3+:E$9$k9V1i2q$d%7%s%]%8%&%`$J$I$N>pJs8r49$N;EAH$_AO@_(J
       $B0lHL8~$1!&650w8~$1$N9V1i2q$d%7%s%]%8%&%`$J$I!$650i!&Ia5Z3hF0$N>pJs$r3F(J $B3X2q4V$GDj>oE*$K8r49$9$k;EAH$_AO@_$7!$$=$l$>$l$NI,MW$K1~$8$F5!4X;o7G:\(J $B$J$I$KMxMQ$9$k$3$H$,9g0U$5$l$?!%(J
    2. $BCf3X9;M}2JBh#2J,Ln(J($B@8J*!&CO3X(J)$B$N652J=q$N%l%t%e!<(J
       $B8=9T652J=q$NLdBjE@$N8!F$!%(J
  $B!L9q:]3X=Q8rN.!M(J
  • $B3$30$N8&5f=82q;22C$B9q:]3X=Q8rN.0Q0w2q$N9T$&;v6H(J
    1. $B309q?M8&5f7f[!!!!!!!!!!LdBjE@$N8!F$>u67!%(J
    2. $B5$>]=8;o$N%M%Q!<%k$X$N4sB#(J
       $B
  $B!LEE;R>pJs!M(J
  • $B5$>]3X2q$N#B#B#S(J($BEE;R7G<(HD(J)$B!$%[!<%`%Z!<%8%"%/%;%9>u67!%(J

  3. $B2q0w2CF~>u67(J

  $B?7F~2q0w(J24$BL>$r>5G'!%2q0w?t(J4,711$BL>!JFb!$DL>o2q0w(J4,194$BL>!K!%(J

  4. $BBh(J30$B4|Lr0wA*5s0Q0w2q3hF0$NJs9p(J

  $B!JBh(J4$B2sM};v2q5D;vO?;2>H!K(J
  $BBh(J4$B2sM};v2q$N>5G'$K$h$j!$A*5s4IM}0Q0w2q0Q0wD9$K$h$jA*5s4IM}0Q0w$,A*Dj$5$l!$(J 11$B7n(J10$BF|A*5s0Q0w2q$,3+:E$5$l!$:#8e$NF|Dx$,7hDj$5$l$?!%(J

  5. 1998$BG/EY;v6H7W2h!&M=;;0F$N8!F$(J

  6. $B2q0wL>Jm$NH/9T7W2h(J

  $B=U4|Bg2q$NAm2q$K$*$1$k2q0w$N0U8+$rM};v$+$iDs<($5$l$?!%(J
  $B3X2q;vL3$H$7$F$O!$L>Jm@0M}$KI,MW$J7PHq$r=|$-!$0F(J(1)$B$G$O2q0wL>Jm$N0u:~!&G[I[$N(J $B$?$a(J150$BK|1_DxEY$NHqMQ$,I,MW$@$,!$0F(J(2)$B$G$bHNGd?t$K$h$C$F$O3X2qB&$KAj1~$NIiC4(J $B$,$+$+$k2DG=@-$,$"$j!$>oG$M};v2q$H$7$F$O!$0F(J(1)$B$NA42q0w$KL5NA$GG[I[$9$kJ}8~$G(J $B7W2h$r?J$a$k$3$H$K$J$C$?!%(J
  $B$J$*!$H/9T$N@'Hs$=$N$b$N$r4^$a!$:G=*E*$K$I$N0F$r:NMQ$9$k$+$O!$J?@.(J10$BG/#47n(J $B:"!$%"%s%1!<%H$K$h$j2q0w$N0U;V$r3N$+$a$F7hDj$9$k$3$H$K$J$k!%(J

  7. $B$=$NB>(J

  $B%*%>%sO"Mm8&5fO"Mm2qBeI=$N8rBe(J
  2000$BG/$N9q:]%*%>%s%7%s%]%8%&%`3+:E$K8~$1!$BeI=$,5$>]3X2qM};vD9BeM}4X8}M}O:(J $B;a$+$iEl5~Bg3X>.@nMx9I65

  ---

  $BF|K\5$>]3X2q%[!<%`%Z!<%8$X(J