桜島火山における各種微動の伝ぱ速度
Contents
1. 5 56 1956 12 6 56 1958 10 15 2 The front and side view of new recorder Fig 3 Fig 4 A B D 2 Ci Cs 2 D E 12. CR 3 5kQ2 1c s 70db 1 10c s 10c s 56 1 Seismometer installed at point No 7 Fig 2 3000 5000 56 56 1 120 mm 6 60 mm 12 30 mm 24 3 ea 13 1 Fig 3 Fig 4 1 Blueprint of new recorder front project Fig 4 2 Blueprint of new recorder side project
3. Fig 7 Fig 5 S 1 14 1 3 5 3 7 33 9 24 10 14 15 3 7 0 1sec
4. 551 21 Velocities of Propagation of Earth Tremors 3 1 and Seismic Waves near Volcano Sakurajima Kagoshima Local Meteorological Observatory We estimated the velocities of propagation of earth tremors and seismic Waves near Sakurajima from our feld experiments during September to November 1958 using a new recorder designed by us Earth tremors at two stations were recorded in parallel moving coil type were used followings _by bus earthquake 1 53 km sec 1 31 D 30m 0 8 km sec 1 8 2 0km sec Crater Crater Hakamagoshi Kagoshima Velocity of waves 1 88km s 2 40km s Velocity of waves 1 03
5. Fig 7 0 9 km sec 4 5 6 A A A 3 7 3 7 A 3 7 95 3 7 er ss RENE aoisoi Fig 8 1 A type earthquake recorded
6. 10 15 17 20 Fig 6 2 A Fig 6 2 0 0 GIS Noise at point No 7 due to Ty phoon No 5821 Sept 16 1958 15 4
7. Received Feb 21 1959 1 S 2 Vol 2 No 1 p 52 2 S 2 Vol 1 No 1 p 65 3 33 5 The magnifcation was about 5000 2 Electro magnetic transducer of As the results we obtained the velocity of surface wave caused by ship 0 67 km sec velocity of surface wave caused 0 9 km sec P wave velocity of et tremor 1 68 km sec P wave velocity of D type 1 3 _3 2 5 6
8. Ps oaa 17 Table 3 B type tremor Fig 9 Station No 3 Station No 7 Df D Time of occurrence TRS 2 3 Tab 4 time 7 3 d h mm s S m S S S 5 3 5 ll 1958 IX 6165622 0 56 21 2 0 8 oe yr es 5 Y gt T04600 7 lg ma aa x 2 01811 0 0 4 18 10 0 1 0 05821 3 1 0 58 20 5 0 8 Table 4 D type earthquake 1 03 17 0 1 0 03 16 2 0 8 Cy Difer Time of occurrence f 12611 0 1 226 10 3 0 7 Phase rm Me cf Station No 3 1 36 34 4 36 33 6 0 8 No 7 time 4 858 0 13 d hm sl m s S Or ME iA SN P 1958 X 2 25846 4 58 45 6 0 9 5 i 2 58 47 3 33944 3 39 43 4 0 9 230512 7 05 11 9 0 8 XxX 3 16 45 48 25 45 47 25 1 0 XX 30 20846 6 O08 45 6 1 0 S 16 45 49 24 45 47 95 1 44813 0 48 11 8 1 P X 15 65830 5 58 29 4 1 1
9. 7 33 9 24 3 7 Fig 1 Ee Fig 7 The ground noise caused by bus the ground noise with mark S are caused by ship et Arrival time of Diffrence of Distance ea Classifcation tremors at arrival time between Velocity No 7 No 3 No 3 No 7 No 3 and No 7 h m _s Gongentioiis Ss S m km s _ 16 15 aul Sudden stop 52 5 51 1 1 4 1180 0 84 Branch point Kitadake 16 23 17 kinolhiras Start 18 8 17 2 1 6 1500 0 94 Ishidoromae 00 53 Sudden stop 2 58 1 TE eae a 5 16 8
10. 1 1 3 3 5 6 7 7 1 6 7 1 5 6 6 1 1 Fig 1 2 3 4 3 m 2 5 m 25m
11. 0 2seec 3 300m 0 67 km sec 0 75 km sec 3 0 3 0 6xm 0 2sec 1 2sec 25sec 2min 5 3 7 1 3 Fig 5
12. Tab 1 1 60 mm 26 Record obtained by new recorder ground motion at stations No 3 No 7 and wind velocity was record ed in parallel in a paper es 14 24 1 Table 1 Combinations of gear wheels in new recorder i a Mh i Pitation eee Ni Drum No Motor No DP 5minr 120mm 16 9mtmm Wi 2 10 60 18 0 195m tr 5 120 1 12 26h ER 10 60 2 25 26h ce i 5 120 9 0 195m eo 2 0 2 gsg0 10 60 33 7 104m CE 3 1 7 1 3 7 Fig 5 3 5 6 5 6
13. 11 12 GORGSRTORII 3 AX to Do9 HH ROUM 24 1 BRANCH FOINT KTTADAKS HTKTNOHTRA N POT Fig 1 Map showing the obseryation stations distance from to 5550m Minamidake No 1 5350 crater No 3 3900 No 7 1600 Hikinohira 340 No 3 INo 1 1550 No 7 300 Hakamagoshi Ofice 1850 No 7 No 1 1850 Hakamagoshi Ofice 95 2 56 56 1 56 1 sec Fig 2
14. 45905 5 A 04 6 0 9 5 37 02 8 37 02 0 0 8 31 00514 9105 14 0 0 9 60239 2 02 38 5 0 7 0 05 16 1 05 14 6 1 5 P 25 31349 0 1348 0 1 0 3 D 0 3sec 3 D 3 D 3 1sec 2 3 7 7 1 53km sec
15. 17 4 4 6 06 17 6 4 6 0 2 4042239 6 3 1122 39 6 2 7 0 0 12 02 59 28 0 1 9 59 27 4 2 0 0 6 16 07 26 36 8 2 8 26 36 0 2 9 0 8 22 20 0609 2 2 7106 09 0 2 8 0 2 7 B B B 5 3 7 1 68 km sec S Tab 3 B Fig 6 1 Tab 3 D
16. 5 Hyphonated gesr wheels are coupled each other 6 Fig 6 1 Record at point No 7 6 5 Two big earthquakes are D type earthquakes caused by explosions and some records in the middle 6 part are those of B type Fine continuous records in the upper part are earth tremors due 1 3 to ships and buses but it is not i known that those in the lower part may be tremors due to weather conditions or volcanic tremors 3 7 Fig 6 1 1 7
17. 8S 1 17 km sec B D B 5 6 8 D 9 Fig 9 D type earthquake recorded on new type recorder TT es 18 24 1 Distance from the source Classifcation of tremors Observation s
18. on new type recorder A type earthquake recorded on new type recorder Fig 8 2 3 7 AA 24 1 3 Tab 2 A Fig 8 Table 2 A type earthquake Station No 3 Station No 7 Differ Time of occurrence es S RR time dh DD s m S S S 1958 30 14 28 51 4 2 1 28 52 3 1 9 0 9 14 52 01 7 2 0 52 02 0 1 9 0 3 15 08 15211 08 15 111 3 0 1 16 07 41 0 12 5 07 41 212 4 0 2 311 45 17 2 1 8 45 16 9 1 6 0 3 12 05 19 2 1 7 05 18 5 1 9 7 14 08 32 1 1 3 08 32 9 1 3 0 8 14 14 50 6 3 1 14 51 5 3 5 0 9 14 23 55 2 10 2 23 55 7 10 3 0 5 14 42 51 910 9 42 52 0 1 1 0 1 14 56 04 310 5 56 04 5 0 6 0 2 18023403 612734 03 6 6 0 0 04 06
19. tation 8 9 to observation station Velocity of tremors earthquakes by ship quai No 3 0 3km 0 67km s surface Wave AA No 8 No 7 1 2 1 5 0 9 RE No 3 No 7 unknown unknown i Nes Neo7 O14 1 68 OS No 3 No 7 1 45 1 53 i Nos No 1 Li et i No 3 5 4 1 88 2 crater No 3 5 4 1 03 D ype wwrtbd crater Kagoshima 10 3 2 40 32 18
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