ㄭ࿾ᒝ㔡⸘ࠕ࡟ࠗߦࠃࠆ㔡Ḯㆊ⒟⸃ᨆߩ⹜ߺ‫ޓ‬ ᣂẟ⋵ਛ⿧ᴒ࿾㔡߳ߩㆡ↪ 
本多亮*

Estimation of rupture process by array analysis - Application to the 2007 Chuetsu-oki earthquakebyRyou HONDA*‫ߦ߼ߓߪޓ‬⊒㔚ᚲౝߩ᷹ⷰὐߩ૏⟎ߪ‫ޔ‬૑ቛ࿾࿑ߣ᧲੩㔚ജࠃࠅឭ‫ޓ‬2007㧔ᐔᚑ 19㧕ᐕ 7 ᦬ 16 ᣣߦ‫ޔ‬ᣂẟ⋵ᨰፒᴒࠍ㔡Ḯଏߐࠇߚᣉ⸳㈩⟎࿑ࠍᾖࠄߒวࠊߖ‫ߢࠩࠗ࠲ࠫ࠺ޔ‬࿾࿑ߣߒߚ M6.8 ߩᣂẟ⋵ਛ⿧ᴒ࿾㔡߇⊒↢ߒߚ‫ޕ‬㔡ᄩ〒㔌਄ࠃࠅᐳᮡࠍขᓧߒߚ㧔⴫㧝㧕‫ޕ‬࿑㧝 b ߦේ⊒ౝߩⷰ⚂ 16km ߦ޽ࠆᨰፒಿ⠀ේሶജ⊒㔚ᚲᢝ࿾ౝߢߪ‫ޔ‬97 บ

᷹ὐ㈩⟎ࠍ␜ߔ‫ޕ‬ᢿጀ㕙ߪ‫ޔ‬㒐ἴ⑼⎇ߩࠗࡦࡃ࡯࡚ࠫࡦߩ࿾㔡⸘ߩ߁ߜ 33 บߢᧄ㔡ߩㄭ࿾ᒝ㔡േߩᵄᒻ߇⸥㍳ࡕ࠺࡞ߐࠇ‫᧲ޔ‬੩㔚ജᩣᑼળ␠

ߒߚ Yukutake et al., 2008㧕‫ޕ‬એਅ‫᧲ޔ‬੩㔚ജࠃࠅ৻⥸㕍੗߶߆‫ޔ‬2007 ߣหߓධ᧲௑ᢳࡕ࠺࡞ࠍណ↪

ߦ౏㐿ߐࠇߡ޿ࠆ‫ޕ‬1995㧔ᐔᚑ 8㧕ᐕߩ౓ᐶ⋵ධㇱ࿾㔡ᨰፒಿ⠀ේ⊒ᢝ࿾ౝߩᵄᒻ⸥㍳ߪ⸥㍳㐿ᆎᤨ㑆߇ᱜ⏕ߦࠍᄾᯏߣߒߡో࿖ߦ⚂ 20km 㑆㓒ߩᓸዊ࿾㔡᷹ⷰ✂㧔Hi-ࠊ߆ࠄߥ޿਄‫ߩ࡯ࠟ࡝࠻ޔ‬หᦼ߽ขࠇߡ޿ߥ޿‫ߢߎߘޕ‬net㧕෸߮ᒝ㔡᷹ⷰ✂㧔K-NET‫ޔ‬KiK-net㧕߇ᢛ஻ߐࠇߡ޿

ߘࠇߙࠇߩ᷹ⷰὐߩᵄᒻ⸥㍳ߢ P ᵄߩ೔㆐ᤨ㑆ࠍ⺒ߺࠆ߇‫੹ޔ‬࿁ߩࠃ߁ߦ㔡Ḯᢿጀߦㄭ޿૏⟎ߢ‫߽߆ߒޔ‬ⓨ㑆ขࠅ‫ޔ‬㔡Ḯ߆ࠄߩℂ⺰⿛ᤨߢᤨ㑆ゲߩේὐࠍ⛔৻ߒߚ‫ޕ‬⊛ߦ㜞ኒᐲߥ᷹ⷰὐߢᓧࠄࠇߚ᷹ⷰ⸥㍳ߪ㕖Ᏹߦ⾆㊀ߥℂ⺰⿛ᤨࠍ⸘▚ߔࠆߚ߼ߩㅦᐲ᭴ㅧߪ‫ޔ‬400 㨙ࠃࠅᷓ޿࠺࡯࠲ߣ޿߃ࠆ‫ޕ‬ㇱಽߪ㒐ἴ⑼ቇᛛⴚ⎇ⓥᚲ੹࿁ߩ㔡Ḯၞߪᱡ㓸ਛᏪ Sagiya et al., 2000 ߩਛߦ૏ࡦࡃ࡯࡚ࠫࡦߢ૶↪ߐࠇߡ޿ࠆ㡻Ꮉ߶߆㧔1984㧕ߦࠃࠆ⟎ߒ‫ޔ‬๟ㄝߢߪ 2004㧔ᐔᚑ 16㧕ᐕᣂẟ⋵ਛ⿧࿾㔡߿ㅦᐲ᭴ㅧࠍ↪޿‫ޔ‬ᵻ޿ㇱಽߪ᧲੩㔚ജࠃࠅឭଏߐࠇߡ޿

2007㧔ᐔᚑ 19㧕ᐕ⢻⊓ඨፉ࿾㔡ߥߤ߇⊒↢ߒߡᵈ⋡ࠍࠆฦ᷹ⷰὐߩࡏ࡯࡝ࡦࠣ⸥㍳߆ࠄ‫ޔ‬KKZ1 ߆ࠄ 4 ߪ৻ภ㓸߼ߡ޿ࠆ࿾ၞߢ޽ࠆ㧔࿑㧝㧕‫ߩߎޕ‬࿾㔡ߩ㔡Ḯㆊ⒟ࠍ

ᯏ࿾⋚♽ߩㅦᐲ᭴ㅧ model1 ࠍ‫ޔ‬KKZ5 ߆ࠄ 7 ߪ 5 ภ᣿ࠄ߆ߦߔࠆߎߣߪ‫ߥ߁ࠃߩߎޔ‬ᱡ㓸ਛߩࡔࠞ࠾࠭ࡓߩᯏ࿾⋚♽ߩㅦᐲ᭴ㅧ model2 ࠍ૶↪ߒ‫ߩ߆߶ߩߘޔ‬ᵄ⸃᣿ߦ㊀ⷐߥᓎഀࠍᨐߚߔߣ⠨߃ࠄࠇ‫ޔ‬ౝ㒽࿾㔡ߩ⊒↢ᒻߦߟ޿ߡߪࠨ࡯ࡆࠬࡎ࡯࡞ߩㅦᐲ᭴ㅧ model3 ࠍ૶ㆊ⒟߭޿ߡߪ੍⍮⎇ⓥߩ⊒ዷߦ߽ነਈߔࠆ‫ߚ߹ޕ‬ේሶജ↪ߒߚ‫ޕ‬㧟ߟߩㅦᐲ᭴ㅧࡕ࠺࡞ࠍ࿑㧝 c ߦ␜ߔ‫ޕ‬⊒㔚ᚲ߇޽ࠆ࿾ၞߢ㔡ᐲ 6 ᒝ߇⸥㍳ߐࠇߚߎߣ߽ೋ߼ߡ࿑㧞ߦ⸃ᨆߦ૶↪ߒߚടㅦᐲᵄᒻ㧔᳓ᐔᚑಽ㧕ࠍ␜ߔ‫ޕ‬ߢ޽ࠅ‫ߥ߁ࠃߩߎޔ‬ᒝ㔡േߩ↢ᚑㆊ⒟ߦᢿጀ⎕უ߇ߤߩ࿑㧞ߩ⍫ශߢ␜ߔࠃ߁ߦᄢᝄ᏷ߩ૏⋧߇ੑߟ⷗߃ࠆߎߣࠃ߁ߦነਈߒߚ߆ࠍ⸃᣿ߔࠆߎߣߪ㕖Ᏹߦ㊀ⷐߢ޽ࠆ‫ޕ‬߆ࠄ‫ޔ‬ᢿጀ㕙਄ߦⶄᢙߩࠕࠬࡍ࡝࠹ࠖ㧔ߔߴࠅ㊂߇ᄢ߈␹ᄹᎹ⋵ߦ߅޿ߡߪ M7 ࠢ࡜ࠬߩ࿾㔡ߩಾㄼᕈ߇ᜰ៰ߐߊ‫ޔ‬ᒝ޿࿾㔡േࠍ᡼኿ߔࠆ႐ᚲ㧕߇ሽ࿷ߒߡ޿ࠆߎߣ߇ࠇߡ߅ࠅ‫ߩߎޔ‬࿾㔡ߦ߅޿ߡᒝ㔡േ↢ᚑㆊ⒟ߦኻߔࠆᢿ

ផቯߢ߈ࠆ‫ߚ߹ޕ‬૏⋧ߩࡇ࡯ࠢߩ૏⟎߇‫ߪ⋡ߟ৻ޔ‬ർጀ⎕უߩነਈࠍ᣿ࠄ߆ߦߔࠆߎߣߪ੹ᓟߩ␹ᄹᎹ⋵ౝߩߩ᷹ⷰὐߩ߶߁߇ᣧߊධ߇ㆃ޿ߩߦኻߒ‫ޔ‬ੑߟ⋡ߩࡇ࡯ᒝ㔡േኻ╷ߦߟ޿ߡߩ⍮⷗ࠍᓧࠆߣ޿߁ὐߢ߽㊀ⷐߢ޽ࠢߪోߡߩ᷹ⷰὐߦ߶߷หᤨߦ೔㆐ߒߡ޿ࠆࠃ߁ߦ⷗߃ࠆ‫ޕ‬ࠆ‫ߦࠗ࡟ࠕߪࠖ࠹࡝ࡍࠬࠕߩ⋡ߟ৻ޔࠄ߆ߣߎߩߎޕ‬ኻᧄႎ๔ߢߪ‫᧲ޔ‬੩㔚ജࠃࠅឭଏߐࠇߚߎࠇࠄߩᵄᒻ⸥㍳ߒߡർነࠅߦ޽ࠅ‫ޔ‬ੑߟ⋡ߪߘࠇࠃࠅ߽߿߿ධነࠅߢฦࠍ↪޿ߡᣂẟ⋵ਛ⿧ᴒ࿾㔡ߩ㔡Ḯㆊ⒟⸃ᨆࠍ⹜ߺߚ‫ޕ‬᷹ⷰὐ߆ࠄ߶߷╬〒㔌ߦ޽ࠆ႐ᚲߦ޽ࠆߎߣ߇ផቯߢ߈ࠆ‫ޕ‬‫࡞࠺ࡕޓ‬෸߮࠺࡯࠲‫ޓ‬࿑㧝㧔a㧕ߦ᷹ⷰὐ૏⟎ߣ઒ቯߒߚᢿጀ㕙ߩ૏⟎ࠍ␜ߔ‫ޕ‬␹ᄹᎹ⋵᷷ᴰ࿾ቇ⎇ⓥᚲ‫␹ ޥ‬ᄹᎹ⋵ዊ↰ේᏒ౉↢↰ ႎ๔㧘␹ᄹᎹ⋵᷷ᴰ࿾ቇ⎇ⓥᚲႎ๔㧘╙  Ꮞ㧘㧘㧚એਅ‫ޔ‬㒐ἴ⑼⎇ߩᵄᒻࠗ࿑㧝‫ ޓ‬C ᣂẟ⋵ਛ⿧ᴒ࿾㔡ߩ㔡Ḯ㧔ᤊශ㧕෸߮૛㔡ಽᏓߥߤ߆ࠄផቯߐࠇߚᢿጀ㕙ߣ⸃ᨆߦ૶↪ߒߚ᷹ⷰὐಽᏓ㧔㤥ਃⷺ㧕‫ ޕ‬Dᨰፒಿ⠀ේ⊒ౝߩ᷹ⷰὐ㈩⟎࿑‫ ޕ‬E ⸃ᨆߦ૶↪ߒߚㅦᐲ᭴ㅧࡕ࠺࡞‫ޕ‬OQFGN ߪ --<4 ߩ‫ޔ‬OQFGN ߪ --<4‫ޔ‬OQFGNߪ -5*) ߩࡏࠕࡎ࡯࡞࠺࡯࠲߆ࠄߘࠇߙࠇផቯߒߚᵻㇱ࿾ਅ᭴ㅧ‫ޕ‬‫⸃ޓ‬ᨆᚻᴺᵄߥߤ߇⸥㍳ߦ฽߹ࠇߡ޿ߡ߽ᢿጀ㕙਄ߩࠛࡀ࡞ࠡ࡯᡼‫ޓ‬㔡Ḯㆊ⒟⸃ᨆࠍⴕ߁႐ว‫ޔ‬㔡Ḯၞࠍ࿐߻ࠃ߁ߦ㈩⟎ߐ኿ጁᱧࠍ⸃ᨆߢ߈ࠆ೑ὐ߇޽ࠆ‫ᧄޔߒߛߚޕ‬ႎ๔ߢߪᢿࠇߚ᷹ⷰὐߩᵄᒻ⸥㍳ࠍ↪޿ߡㅒ⸃ᨆࠍⴕ߁ߩ߇৻⥸⊛ጀ㕙਄ߢߩࠕࠬࡍ࡝࠹ࠖ૏⟎ߩផቯߩߺᬌ⸛ߒ‫ޔ‬⎕უߩߢ޽ࠆ‫ޔߒ߆ߒޕ‬ᢿጀㄭறߢ⒮ኒߥᵄᒻ⸥㍳߇ᓧࠄࠇߡવ᠞ߥߤߦߟ޿ߡߪ⠨ኤࠍⴕࠊߥ޿‫ޔߚ߹ޕ‬㔡Ḯㄭறߦ޿ࠆߎߣ߆ࠄ‫ᧄޔ‬ႎ๔ߢߪ Ishii et al. 2005 ߿ Hondaߪ⥄ᴦ૕ߦࠃߞߡ⸳⟎ߐࠇߚ㔡ᐲ⸘߽޽ࠆ߇‫੹ޔ‬࿁ߪᨰ

et al. 2008 ߥߤߢណ↪ߐࠇߡ޿ࠆࠕ࡟ࠗ⸃ᨆߩᚻᴺࠍፒಿ⠀ේ⊒ߩᒝ㔡േ⸥㍳એᄖߪ૶↪ߒߥ޿‫↪ࠍࠄࠇߎޕ‬↪޿ࠆ‫ߩߎޕ‬ᚻᴺߢߪ‫ࠅߴߔޔ‬㊂ߥߤߩ⛘ኻ୯ࠍផቯߔ޿ߚࠃࠅ⹦⚦ߥ⸃ᨆ⚿ᨐߦߟ޿ߡߪ‫੹ޔ‬ᓟႎ๔ߔࠆ੍ቯࠆߎߣߪߢ߈ߥ޿߇‫ޔ‬㔡Ḯ߆ࠄ᡼಴ߐࠇࠆࠦࡅ࡯࡟ࡦ࠻ߢ޽ࠆ‫ޕ‬ߥᵄߛߌࠍ᛽಴ߔࠆߚ߼‫ޔ‬㔡Ḯ↱᧪એᄖߩ෻኿ᵄ߿⴫㕙‫ޓ‬㔡Ḯㆊ⒟ߩ⸃ᨆߦߪ‫ⷰޔ‬᷹ߐࠇߚ᳓ᐔേ 2 ᚑಽߩടㅦ
ᐲᵄᒻߦ㧝Hz ߆ࠄ 20Hz ߩࡃࡦ࠼ࡄࠬࡈࠖ࡞࠲࡯ࠍ߆⴫㧝‫ޓ‬࿾࿑߆ࠄ⺒ߺขߞߚฦ᷹ⷰὐߩᐳᮡ୯‫ޕ‬ߌߚ߽ߩࠍ૶↪ߒߚ㧔࿑㧞㧕‫ޕ‬㕍੗߶߆ 2007 ߣหߓ30km×24km ߩᢿጀ㕙ࠍ઒ቯߒ‫ޔ‬㧞জ྾ᣇߩዊᢿጀߦಽഀߔࠆ‫ޕ‬ዊᢿጀߣ᷹ⷰὐߩࡍࠕߏߣߦℂ⺰⿛ᤨࠍ⸘▚ߒ‫ޔ‬޽ࠆዊᢿጀߦߟ޿ߡᚑಽߏߣߦోߡߩടㅦᐲᵄᒻࠍࠬ࡜
ࡦ࠻ࠬ࠲࠶ࠢ㧔଀߃߫ Yilmaz‫ޔ‬1987㧕ߔࠆ‫ߩߎޕ‬ಣℂߦࠃߞߡ‫ޔ‬ዊᢿጀ߆ࠄߩᝄ᏷ߩᄢ߈ߥࠦࡅ࡯࡟ࡦ࠻ߥᵄߛߌ߇ᒝ⺞ߐࠇ‫ޔ‬ᱷࠅߩ૏⋧ߪ㒰෰ߐࠇߚ㊀วᵄᒻ߇ߢ
߈ࠆ‫ޕ‬ᓧࠄࠇߚ㊀วᵄᒻࠍߘߩዊᢿጀ߆ࠄߩࠛࡀ࡞ࠡ࡯
ߩ᡼኿ጁᱧߣߺߥߔ‫߁ⴕࠍࠣࡦࠠ࠶࠲ࠬޔߚ߹ޕ‬㓙‫ޔ‬ᝄ᏷߇ᄢ߈޿ߛߌߢߥߊࠃࠅࠦࡅ࡯࡟ࡦ࠻ߥᵄߛߌࠍᒝ⺞ߔࠆߚ߼ߦ‫ᤨࠣࡦ࡝ࡊࡦࠨޔ‬㑆ߩ೨ᓟ 0.5 ⑽㑆ߩᤨ㑆⓹ߢ࠮ࡦࡉ࡜ࡦࠬ୯ࠍ⸘▚ߒ‫ޔ‬㊀ߺߣߒߡࠬ࠲࠶ࠢᵄᒻߦ

࿑㧞 ⸃ᨆߦ૶↪ߒߚടㅦᐲᵄᒻ‫ࠍ࡯࠲࡞ࠖࡈࠬࡄ࠼ࡦࡃߩ \* ߪࠄࠇߎޕ‬ㅢߒ‫ޔ‬ᵄᒻߏߣߦᦨᄢ୯ߢⷙᩰൻߒߡ޽ࠆ‫ޕ‬ฦᵄᒻߩᦨᄢ୯ࠍᵄᒻߩฝਅߦ␜ߔ‫ޕ‬Ყセ⊛ૐ๟ᵄᚑಽߦንߺ‫ޔ‬ᝄ᏷ߩᄢ߈ߥࡄ࡞ࠬࠍ⍫ශߢ␜ߔ‫ᤨޕ‬㑆ゲߩේὐߪ⊒㔡ᤨೞ‫ޕ‬ၮḰὐ --<4 ߩᤨ㑆ߢ‫⊒ޔ‬㔡ᤨ߆ࠄ  ⑽ᓟ߆ࠄ  ⑽ᓟ߹ߢߩᵄᒻߦߟ޿ߡ⸃ᨆࠍⴕߞߚ‫⸃ޕ‬ᨆࠍⴕߞߚᤨ㑆⓹ࠍ--<4 ߩᵄᒻ਄ߦ␜ߔ‫ޕ‬࿑㧠‫ߦ⊛⚳ᦨޓ‬ᓧࠄࠇߚ‫ޔ‬ᢿጀ㕙਄ߩ⋧ኻ⊛ߥࠛࡀ࡞ࠡ࡯᡼኿Ⓧ▚࿑㧔ᦨᄢ୯ߢⷙᩰൻ㧕‫ޕ‬㔡Ḯઃㄭߣᢿጀ㕙ධ⷏ㇱߦࠕࠬࡍ࡝࠹ࠖ߇ផቯߐࠇߚ‫ޕ‬ដߌวࠊߖࠆ semblance enhanced stacking ߣ޿߁ᚻᴺࠍ࠻ㇱಽߢߩਇㅪ⛯ࠍ㒐ߋߚ߼ߦࠦࠨࠗࡦ࠹࡯ࡄ࡯ࠍ߆ߌ↪޿ࠆ㧔᧻ᧄ߶߆‫ޔ‬1999㧕‫ޕ‬ᐔṖൻߒߚ‫ޕ‬‫ߩࠬࡦ࡜ࡉࡦ࠮ޓ‬ᑼߪ ᓧࠄࠇߚฦዊᢿጀ਄ߢߩ㊀วᵄᒻߩ⛘ኻ୯ࠍᤨ㑆Ⓧಽߒߚ߽ߩ߇‫ߩߘޔ‬ዊᢿጀ߆ࠄ᡼኿ߐࠇߚ࠻࡯࠲࡞ߩࠛࡀM

§ N2

¦¦·2

§ N ¨
A j (t i ·¸ dt j ) ¸¸¨¦ A¦¨ i 1 ¨© j j(t1i  dt j ) ¸¹i 1j 1¹
S S © MM § N § N··N ¦N¨¨ ¦ A¨2j (t i Adt2j (j t)i¸¸  dt j ) ¸¸¨i 1© j 1¹i 1© j 1¹M¦¦࡞ࠡ࡯ߦᲧ଀ߔࠆߣߺߥߔ‫ޕ‬‫⚿ޓ‬ᨐߣ⠨ኤ‫ޓ‬ၮḰ᷹ⷰὐ KKZ7R2 ߩᤨ㑆ゲߢ㧡⑽߆ࠄ 13 ⑽߹ߢߩ8 ⑽㑆ߩᵄᒻ⸥㍳ߦߟ޿ߡ‫ޔ‬ᓧࠄࠇߚ⚿ᨐࠍ࿑㧟ߦ␜ߔ‫ޕ‬࿑㧟ߪ‫ޔ‬ฦዊᢿጀߩ㊀วᵄᒻߩ⛘ኻ୯ࠍⓍಽߒߚ߽ߩߢߣ⴫⃻ߢ߈ࠆ‫ޔߢߎߎޕ‬j ߪ j ⇟⋡ߩ᷹ⷰὐࠍ ti ߪࠨࡦ޽ࠆ‫ޕ‬⎕უߩ㐿ᆎὐઃㄭߣᢿጀߩධ⷏ߩ┵ߦᄢ߈ߥࡇ࡯ࡊ࡝ࡦࠣߒߚᤨ㑆ࠍ⴫ߒ‫ޔ‬Aj t ߪ j ⇟⋡ߩ᷹ⷰὐߢߩ

ࠢ߇ផቯߐࠇߚ‫ߪࠄࠇߎޕ‬࿑㧞ᵄᒻ⸥㍳ߩ⍫ශߢ␜ߒߚ

ᤨೞ t ߢߩᝄ᏷ࠍ⴫ߔ‫ޕ‬dtj ߪၮḰὐߣ j ⇟⋡ߩ᷹ⷰὐߩ

ੑߟߩᄢ߈ߥࡄ࡞ࠬߩ⊒㔡Ḯߦኻᔕߔࠆ‫ⷰޕ‬᷹ᵄᒻߦ⷗㑆ߩ⿛ᤨᏅߢ޽ࠆ‫ޕ‬ዊᢿጀߏߣߦ㊀วᵄᒻࠍ૞ᚑߒߚᓟ‫ޔ‬ࠄࠇࠆᦨೋߩᄢᝄ᏷ߩࡄ࡞ࠬߪ⎕უ㐿ᆎὐઃㄭߩࡇ࡯ࠢ⎕უߩ㐿ᆎὐ߆ࠄߩ⎕უવ᠞ㅦᐲߩᦨㅦ୯ࠍ઒ቯߒߡ߆ࠄ‫ߚ߹ޔ‬ੑߟ⋡ߩࡄ࡞ࠬߪᢿጀ㕙ධ⷏ㇱߩࡇ࡯ࠢ߆ࠄ

ࡒࡘ࡯࠻ಣℂࠍⴕ߁଀߃߫ Yilmaz‫ޔ‬1987 ‫੹ޕ‬࿁ߪ⎕᡼኿ߐࠇߚߎߣ߇ಽ߆ߞߚ‫ޕ‬K-NET ߥߤߩᒝ㔡⸥㍳߆უવ᠞ㅦᐲࠍ⑽ㅦ 2.8km એਅߣ઒ቯߒ‫߽ࠅࠃࠇߎޔ‬ㅦ޿ࠄᵄᒻࠗࡦࡃ࡯࡚ࠫࡦߦࠃߞߡផቯߐࠇߚࠕࠬࡍ࡝࠹ࠖᤨ㑆ߩᤨ㑆Ꮺߦߪࡒࡘ࡯࠻ಣℂࠍᣉߒߚ‫࡯ࡘࡒޔߚ߹ޕ‬ಽᏓ㧔㕍੗߶߆‫ޔ‬2007㧕ߣᲧセߔࠆߣ‫ޔ‬ਥߚࠆ⎕უၞߪ⎕უ㐿ᆎὐ߆ࠄධ⷏ᣇะߦ᜛߇ߞߡ߅ࠅ‫ޔ‬ᨰፒᏒᴒߦᄢ߈ߥࠕࠬࡍ࡝࠹ࠖ߇ሽ࿷ߔࠆὐߥߤ‫ᧄޔ‬ႎ๔ߩ⚿ᨐߣ㕖

array, Nature, doi:10.1038/nature03675.
᧻ᧄ⡡࡮ዊේ৻ᚑ࡮ศᧄ๺↢࡮ᢧ⮮┥ᒾ࡮㐳⼱Ꮉᤘ࡮દᏱߦࠃߊ৻⥌ߔࠆ‫ޕ‬᧲᣿ᒾ㧔1999㧕⍴ࠬࡄࡦࠕ࡟᷹ࠗⷰߦࠃࠆᅏ⠀⣄᪞ࡇ࡯ࠢߩ㕙Ⓧߪੑߟ⋡ߩࡄ࡞ࠬߦኻᔕߔࠆ߽ߩߩ߶߁߇

ጊ࿾๟ㄝߩ࿾Ზਇဋ⾰᭴ㅧߩࠗࡔ࡯ࠫࡦࠣ , ࿾㔡 ,ᄢ߈ߊ⷗߃ࠆ‫ޔߒߛߚޕ‬ዊᢿጀ߆ࠄߩℂ⺰⿛ᤨ߇᷹ⷰὐ

 , 283-297㧚

㑆ߢ޽߹ࠅᄌࠊࠄߥ޿႐วߦߪ‫ߩ⌀ޔ‬㔡Ḯߩ๟࿐ߦ߷߿

Sagiya, T., Miyazaki, S. and Tada, T. (2000), Continuousߌߚࠃ߁ߥ௝ߦߥࠆน⢻ᕈ߇޽ࠆ‫ߚ߹ޕ‬ℂ⺰⿛ᤨᏅߪᢿGPS Array and Present-day Crustal Deformation ofጀ㕙਄ߩ႐ᚲߏߣߦᄌࠊࠆߚ߼ߦ‫ޔ‬ᢿጀ㕙਄ߢߩ⸃௝ᐲ

Japan, PAGEOPH, 2303-2322.

߇৻ቯߢߥ޿น⢻ᕈ߽޽ࠆߚ߼‫ޔ‬ᔅߕߒ߽⎕უ㐿ᆎὐߩ㡻Ꮉర㓶࡮⍹↰ℰⓄ࡮᧻᧛ᱜਃ࡮═ේᢘม 1984 ,㑐᧲࡮ࡇ࡯ࠢߦኻߒߡධ⷏ㇱߩࡇ࡯ࠢ߇ᄢ߈޿ߣߪ㒢ࠄߥ޿‫ޕ‬᧲ᶏ࿾ၞ࿾㔡᷹ⷰ✂ߦࠃࠆ㔡Ḯ᳿ቯᴺߦߟ޿ߡ ,࿖ߐࠄߦ੹࿁ߩ⸃ᨆߢߪᝄ᏷ߩ〒㔌ᷫ⴮ߩߺ⠨ᘦߒ‫ޔ‬ᷫ⴮┙㒐ἴ⑼ቇᛛⴚ࠮ࡦ࠲࡯⎇ⓥㅦႎ , 53, 1-88.

߿ᢿጀࡔࠞ࠾࠭ࡓߦ⿠࿃ߔࠆᝄ᏷ߩᣇ૏ଐሽᕈࠍ⠨ᘦߒ

Wessel, P. and Smith, W. H. F. 1995 , New version of theߡ޿ߥ޿‫ޔߚ߹ޕ‬㧟ᰴర⊛ߥㅦᐲ᭴ㅧߩਇဋ⾰ߦߟ޿ߡ‫ޔ‬Generic Mapping Tools released, EOS Trans. Am.

૛㔡⸥㍳ߥߤ߆ࠄ⵬ᱜࠍⴕ߁ߴ߈ߛ߇‫ᧄޔ‬ႎ๔ߢߪߎߜ

Geophys. Union, 76, 329.

ࠄ߽⠨ᘦߒߥ߆ߞߚ‫੹ޕ‬ᓟߪߎߩࠃ߁ߥ⵬ᱜࠍዉ౉ߢ߈ࠆࠃ߁‫⸃ޔ‬ᨆࠕ࡞ࠧ࡝࠭ࡓߩ᭴▽ࠍⴕߞߡ޿ߊᔅⷐ߇޽ࠆ‫ޕ‬

Yilmaz, Ö., 1987 ,Seismic Data Processing, Soc. OfExplor. Geophys., 526pp, Tulsa, Okla.
Yukutake, Y., T. Takeda, and K. Obara, 2008 , Highresolved hypocenter distribution using the double-‫⺰⚿ޓ‬difference relocation method in the region of the‫⸃ࠗ࡟ࠕޓ‬ᨆߦࠃࠆࠕࠬࡍ࡝࠹ࠖߩࠗࡔ࡯ࠫࡦࠣߩ⚿2007 Chuetsu-oki Earthquake, Earth Planets Space,ᨐ‫ޔ‬M 㧣⒟ᐲߩ࿾㔡ߦ߅޿ߡ߽ㆡಾߥ᷹ⷰὐ㈩⟎ߢᵄin press.

ᒻࠍ⸥㍳ߢ߈ࠇ߫㔡Ḯߩ⎕უㆊ⒟ߩផቯ߇น⢻ߢ޽ࠆߎߣ߇␜ߐࠇߚ‫੹ޕ‬࿁ߩ⸃ᨆߢߪ⎕უߩ㐿ᆎὐߩ߶߆‫ޔ‬ᨰፒಿ⠀ේ⊒ߦㄭ޿ᢿጀߩᷓㇱධ⷏┵ߦࠕࠬࡍ࡝࠹ࠖ߇ផቯߐࠇߚ‫ޕ‬⻢ㄉ‫᧲ޓ‬੩㔚ജᩣᑼળ␠ߦߪᨰፒಿ⠀ේ⊒ౝߩᒝ㔡േᵄᒻࠍឭଏߒߡ޿ߚߛ߈߹ߒߚ‫ޕ‬㒐ἴ⑼ቇᛛⴚ⎇ⓥᚲߩ㕍੗⌀ඳ჻ߦߪ‫ޔ‬ᨰፒಿ⠀ේ⊒ߩᵄᒻߦߟ޿ߡࠕ࠼ࡃࠗࠬࠍ޿ߚߛ߈߹ߒߚ‫ޕ‬࿑ߩ૞ᚑߦߪ GMT Wessel and Smith,1995 ࠍ૶↪ߒߡ޿߹ߔ‫ߡߒ⸥ޕ‬ᗵ⻢޿ߚߒ߹ߔ‫ޕ‬ෳ⠨ᢥ₂㕍੗⌀࡮㑐ญᤐሶ࡮᫪Ꮉାਯ࡮ഞಷථ࡮⊕ဈశⴕ 2007 ㄭ࿾ᒝ㔡േ⸥㍳ߦࠃࠆ 2007 ᐕᣂẟ⋵ਛ⿧ᴒ࿾㔡ߩ㔡Ḯࠗࡦࡃ - ࡚ࠫࡦ , ᣣᧄ࿾㔡ቇળ 2007 ᐕ⑺ቄᄢળ ,઄บ , P01-175.
Honda, R., Aoi, S., Sekiguchi, H., Fujiwara, H.㧔2008㧕
Imaging of an asperity of 2003 Hokkaido Tokachioki earthquake, Geophysical Journal International,
, 1104-1116.
Ishii M., P. M. Shearer, H. Houston and J. E. Vidale
2005  Extent, duration and speed of the 2004
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