九州東南部における光波測量 (序報)
Contents
1. 4 Fi8 9 er ez 9 s 9 4 29 6 6mpv X S 3 Oz Cmpve 5 Ompvi S2. 7 2 30 1 2 3 4 5 6 25 B 1 57 4
3. Photo 1 Photo 1 Thermister holder with double coaxial covers and ventilationfan 26 25 B 1 57 4 4 1981 3 12 2 1
4. 1 22 B 1 1979 pp 61 77 AGA Geotronics AB Geodimeter 600 Operatng Manual 1977 1979 pp 22 24 16 3 1970 pp 137 147 27 3 1981 pp 173 182 24 1980 pp 234 235 60 17 1 2 1971 pp 4 7
5. 1976 90 km 2 1981 20 km 2 2 1
6. Fi8 5 9 3X10 Geodimeter Wi8 4 2 oo Akeuo Fi8 6 AKAOKA Sa 1967 1979 4 VM 2 Ff 9 NANO a 6
7. 1 2 ig 7 1 65 1 2 10 6 4 Geodimeter
8. z N 45 E S 45 W 3 N8S5YE N8O E 2 3
9. 2 4 4 A B Table 1 Results of distance measurements Miyazaki Network No 0 PS ee Tkeuchi Heiwadai Mochida Matsuzaki m mm m mm mm 1 Mar 23 26 1981 19909 071 2 17534 657 3 13575 280 3 7641 905 4 029 4 648 5 227 3 918 3 2 Dec 13 15 1981 No a ES Yamashita Kiyotake Horikiritoge Shiroyarma _m mm m mm m mm mm 1 iMar 23 26 1981 6336 339 2 8630 959 2 3776 530 2 2676 231 4 2 Dec 13 15 1981 306 1 959 4 516 3 217 Neb Network No Inate 0 xs PID Tomiyama Hosomi Mukabakiyama Kagamiyama a m mm m mm m mm m mm 1 Dec 11 12 1981 8813 884 5 8797 780 3 9942 955 2 17292 891 3 PLAN OF BASE LINES L_5Skm FRVED STRAINS O SP BS RiNCIPAL STRAINS Fig 4 Principal strains calculated from various combinations of base lines in Miyazaki network NO 1977 1978 1979 1980 1981 10 8 Fig 5 Secular strain rates observed by extensometers at the Miyazaki Crustal Movement Observatory and prin
10. 2 1 Fi8 2 2 km 230m es 24 25 B 1 57 4 a x 2 2 NINE A EE Cd MT MT ry e 8 a Raa 5 y Ne CRUSTA 1 a Rr ES 5 mares OBSE VATORY a 5 KO A 4 9 a x i 63 ee HB Sp N a SN a k of AN 1 1 a ih 7 1 SO 37 rr Fig 1 Location of base hne networks and related crustal movement observatories 8 8 IKEUCHI N NN MOCHIDA SS a MATSUZAKI KIYOTAKE NeYAMASH 4 Miyazoki Crusfql
11. 2 2 Fi8 3 4 210m 77m 310m 370m 635m 3 120 3 AGA Geodimeter 600 No 64062 AGA 4 Geodimeter 1
12. HITT SBA Fi8 7 AOCMDAP P Ko 5 Fig 6 Miyazaki rhombus base Hnes by Ti8 4 Geographical Survey Institute RS 28 25 B 1 57 4 RHOMBUS 2 7 BASE LINES i HITOTSUBA Te po I rd 1973 2 1979 12 NIL CONT 10 8 EXT 1 8 8 1958 1968 70 A 1 1 1 Pl 5 0 1892 94 1958 i 1 FIRST TRIANGULATION 0SZ SGY UST 1 1 4 4 Fig 7 Principal strains calculated from results of observations at Miyazaki rhombus base lines above and from results of frst triangulation Fig 8 First triangulation net neighbouring net adjustments below of our networks 4 2 6 1 Fi8 amp 8 2
13. DDED BASE LINE 1 45 AZIMUTH Fig 9 Addition of a base line to 8 base lines network left fgure rcduces the standard errors in homogeneous strain solutions The rations of standard errors in the solutions based on 9 base jines network to those based on 8 base lines network are plotted in function of azimuth of added base line right fgure Suffix mpv means most provable value and js sum of residual squares and nm is a number of base Hnes 2 explicit 9 implicit 8 1 Fi8 9 9 8 N 5 W ig 9 8 9 z 3
14. 10 AGA 6cm 10 km 1 1 4 Geodimeter 5m 5 m 10m
15. 2 Table 1 10 3 5 2 2 4 1 3 12 2 Fi8 4 8 3
16. 23 ELECTRO OPTICAL DISTANCE MEASUREMENT IN THE SOUTHEASTERN REGION OF KYUSHU DISTRICT By Michio TAKADA Tamotsu FURUZAWA Fumio OHYA Masahtro TERAISHI and Vasumsz SONODA Synopsis Two base line networks for distance measurement wtih Geodimeter are constructed at the coastal region of Miyazaki prefecture in Kyushu district The Miyazaki network consists of 8 base lines and the Nobeoka network consists of 4 base lines Results of repeated surveys of these networks will reveal the horizontal strain changes in this region which neighbors on the source region of histo rical major earthquakes in the Hyuganada sea At the Miyazaki network the first survey was carried out at March and the second at December in 1981 Observed strains for these 9 monthes contain quantitative uncertainty but qualitatively agree with the results of continuous observations by extensometers at the Miyazaki Crustal Move ment Observatory and those of repeated surveys at rhombus base lines and first triangulation net by G S I The Nobeoka network was surveyed only once at December in 1981 An effective distribution of base line azimuthes is also discussed to estimate a homogeneous strain field 1
17. Movement Observafory KAEDAC Se 0 5km HORIKIRITOGE Fig 2 Miyazaki base ine network 8 22m 125m KAGAMIYAMA a MUKABAKIYAMA HOSOMI SO ATAGOYAMA TOMIYAMA 7 Fig 3 Nobeoka base line network 25 50 80m 8 3 6
18. cipal strains calculated from them Notations of A B C are the same as in Fig 4 C 4 6 3 45 2 4 5
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