๝௱6$5峑ৄ岲峐岷峉ৗ峉峔৉൜൸䠍䠊ά᩿ᒙ䛾άື䛸ᆅ⾲䛾ኚືά᩿ᒙ䛜άື䛧ᆅ㟈䛜ᘬ䛝㉳䛣䛥䜜䜛䛸䚸ᆅୗ䛾᩿ᒙ䛾䛪䜜䛻䜘䜚ᆅ⾲䛻䛥䜎䛦䜎䛺ኚ໬䛜⌧䜜䜎䛩䚹᭱䜒㢧ⴭ䛺䜒䛾䛿᩿ᒙ䛾䛪䜜䛜ᆅ⾲䛻⌧䜜䛯 䛂ᆅ⾲ᆅ㟈᩿ᒙ䛃䛷䛩䚹ᆅ⾲䛜䛹䛾䜘䛖䛻ኚື䛧䛯䛾䛛䜢ᢕᥱ䛩䜛䛣䛸䛿䚸ᆅୗ䛷䛹䛾䜘䛖䛺⌧㇟䛜Ⓨ⏕䛧䛯䛾䛛䜢▱䜛䛯䜑䛾㔜せ䛺᝟ሗ䛷䛩䚹䛧䛛䛧䚸ᆅ⾲䛾ኚື䜢ṇ☜䛻ᢕᥱ䛩䜛䛯䜑䛻䛿䚸ᆅ⾲䜢୹ᛕ䛻㋃ᰝ䛧䛯䜚䚸୕ゅ 㔞䜔Ỉ‽ 㔞䜢⾜䛖ᚲせ䛜䛒䜚䚸ᡭ㛫䛸᫬㛫䛾䛛䛛䜛సᴗ䛷䛧䛯䚹㏆ᖺ䚸ᅜᅵᆅ⌮㝔䛾㟁Ꮚᇶ‽Ⅼ䛜ᩚഛ䛥䜜䚸඲ᅜ1300䞄ᡤ䛾㟁Ꮚᇶ‽Ⅼ䛷ᆅ㟈ᚋ┤䛱䛻ṇ☜䛺ᆅ⾲䛾ኚື䜢ィ 䛩䜛䛣䛸䛜䛷䛝䜛䜘䛖䛻䛺䜚䜎䛧䛯䛜䚸㟁Ꮚᇶ‽Ⅼ䛿⣙20km㛫㝸䛷タ⨨䛥䜜䛶䛔䜛䛣䛸䛛䜙䚸᩿ᒙ䛾㏆ഐ䛾ኚື䜢ヲ⣽䛻ᢕᥱ䛩䜛䛣䛸䛿䛷䛝䜎䛫䜣䚹ഌஉ བ‫ق‬বଅ৉৶੹‫ك‬ᖸ΅SARᆅ⾲ᆅ㟈᩿ᒙ䛰䛔䛱2ྕ䠄ALOS-2) JAXA䝩䞊䝮䝨䞊䝆䜘䜚䠎䠊ᖸ΅SAR䛻䜘䜛ᆅ⾲ኚື䛾ほ1990ᖺ௦ᚋ༙䛛䜙䚸ேᕤ⾨ᫍ䛻ᦚ㍕䛥䜜䛯ྜᡂ㛤ཱྀ䝺䞊䝎䞊䠄SAR䠅䛸䛔䛖䝉䞁䝃䞊䜢⏝䛔䛶ᆅ⾲䜢㠃ⓗ䛻ほ 䛩䜛᪉ἲ䛜㛤Ⓨ䛥䜜䜎䛧䛯䚹SAR䛿䚸䝉䞁䝃䞊䛛䜙ᆅ⾲䛻ྥ䛡䛶㟁☢Ἴ䠄䝬䜲䜽䝻Ἴ䠅䜢Ⓨᑕ䛧䚸ᆅ⾲䛷཯ᑕ䛧䛶ᡠ䛳䛶䛝䛯㟁☢Ἴ䛾ᙉᗘ䜔఩┦䜢ほ䛩䜛ᢏ⾡䛷䛩䚹≉䛻䚸ྠ䛨㌶㐨ୖ䛾2ᅇ䛾ほ 䛾఩┦䜢ᖸ΅䛥䛫䜛䛣䛸䛻䜘䜚䚸2ᅇ䛾ほ 䛾㛫䛾ேᕤ⾨ᫍ䛸ᆅ⾲䛾㊥㞳䛾ኚ໬䜢㠃ⓗ䛻ᤊ䛘䜛䛣䛸䛜䛷䛝䜎䛩䚹䛣䛾䜘䛖䛺ほ᪉ἲ䜢ᖸ΅SAR䛸䛔䛔䚸䛭䛾⤖ᯝ䛸䛧䛶ᚓ䜙䜜䛯⦤ᶍᵝ䛾⏬ീ䜢SARᖸ΅⏬ീ䛸䛔䛔䜎䛩䚹⌧ᅾ䚸᪥ᮏ䛷䛿䚸2014ᖺ䛻Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ䠄JAXA䠅䛜ᡴ䛱ୖ䛢䛯ேᕤ⾨ᫍ
䛂䛰䛔䛱䠎ྕ䛃䛻ᦚ㍕䛥䜜䛯SAR䛜⏝䛔䜙䜜䛶䛚䜚䚸䛣䛾ሙྜ䛿⦤ᶍᵝ୍࿘ศ䠄㟷→㯤→㉥→⣸→㟷䚸䜒䛧䛟䛿䛭䛾㏫䠅䛜⣙12cm䛾㊥㞳䛾ኚ໬䜢⾲䛧䛶䛔䜎䛩䚹ᖸ΅SAR䛷䛿䚸ኳೃ䜔᫨ኪ䛻㛵ಀ䛺䛟ほ 䛩䜛䛣䛸䛜䛷䛝䚸ᆅୖ䛻≉ู䛺⿦⨨䜢タ⨨䛩䜛ᚲせ䛜䛺䛟䚸ᆅ⾲䛾ኚ໬䜢㠃ⓗ䛻ᢕᥱ䛩䜛䛣䛸䛜䛷䛝䜎䛩䚹2016ᖺ⇃ᮏᆅ㟈䛻క䛖ᆅ⾲ᆅ㟈᩿ᒙ䚹༡㜿⸽ᮧ䚹ᅜᅵᆅ⌮㝔᧜ᙳ2016ᖺ⇃ᮏᆅ㟈NNᅗ䛾⠊ᅖ᪥ᮏ஑ᕞ䠏䠊ᖸ΅SAR䛻䜘䛳䛶᫂䜙䛛䛻䛺䛳䛯ᆅ⾲ኚື䠍䠅2016ᖺ⇃ᮏᆅ㟈䠄M7.3䠅
ᆅ⾲ኚື䛾኱㒊ศ䛿㟈※᩿ᒙ䛷䛒䜛ᕸ⏣ᕝ䞉᪥ዉஂ᩿ᒙᖏ䛾᩿ᒙ㐠ື䛷ㄝ᫂䛷䛝䜎䛩䛜䚸㟈※᩿ᒙ䛛䜙㞳䜜䛯ሙᡤ䛷᩿ᒙ㐠ື䜢♧䛩ᆅ⾲ኚື䛾⥺≧䛾୙㐃⥆䛜ከᩘⓎぢ䛥䜜䜎䛧䛯䚹⌧ᆅㄪᰝ䜢⾜䛳䛯䛸䛣䜝䚸ከ䛟䛾୙㐃⥆⥺ୖ䛷ᆅ⾲䛾ኚື䛜☜ㄆ䛥䜜䜎䛧䛯䚹䛣䜜䜙䛿ᆅ㟈䜢ᘬ䛝㉳䛣䛧䛯᩿ᒙ䛾䛪䜜䛜ᆅ⾲䛻⌧䜜䛯ኚື䛸䛿⪃䛘䜙䜜䛪䚸ᆅ㟈䛻క䛖ᛂຊ䛾ኚ໬䜔ᆅ㟈ື䛻䜘䜚ㄏⓎ䛥䜜䛯ཷືⓗ䛺ᆅ㟈᩿ᒙ䛸⪃䛘䜙䜜䜎䛩䚹ᖸ΅SAR䛻䜘䛳䛶᳨ฟ䛥䜜䛯ᆅ⾲᩿ᒙᕸ⏣ᕝ᩿ᒙᖏἢ䛔䛾㠀ᖸ΅ᆅᖏ2016ᖺ4᭶16᪥
Mw 7.0⾨ᫍ䛻㏆䛵䛟⌧ᆅㄪᰝ䛻䜘䜛ᆅ⾲ᆅ㟈᩿ᒙ䠄ᆅ㉁ㄪᰝ⥲ྜ䝉䞁䝍䞊䚸2016䠅

2016ᖺ4᭶14᪥
Mw 6.2⾨ᫍ䛛䜙㐲䛦䛛䜛

4᭶14᪥䛛䜙23᪥䜎䛷䛾㟈ኸ఩⨨-12

䠎䠅2018ᖺ኱㜰ᗓ໭㒊䛾ᆅ㟈䠄M6.1䠅
㟈※᩿ᒙ䛾䛪䜜䛜ᆅ⾲䛻⌧䜜䛯ᆅ⾲ᆅ㟈᩿ᒙ䛿☜ㄆ䛥䜜䛶䛔䜎䛫䜣䛜䚸᭷㤿-㧗ᵳ᩿ᒙᖏ䛾┿ୖ᩿ᒙ䛸୍⮴䛩䜛ሙᡤ䛷䜟䛪䛛䛻ᆅ⾲ኚື䛜ㄆ䜑䜙䜜䜎䛧䛯䚹┿ୖ᩿ᒙ䛿1596ᖺ៞㛗అぢᆅ㟈䠄M7.5䠅䛷䛾ኚ఩䛜☜ㄆ䛥䜜䛶䛚䜚䠄ᐮᕝ䜋䛛1996䠅䚸⧞䜚㏉䛧ᆅ㟈䜢ᘬ䛝㉳䛣䛧䛶䛝䛯άືⓗ䛺ά᩿ᒙ䛻䛚䛔䛶䜒ᆅ㟈䜢క䜟䛺䛔ཷືⓗ䛺ኚ఩䛜㉳䛣䜚䛖䜛ྍ⬟ᛶ䜢♧䛧䛶䛔䜎䛩䚹-60
612⾨ᫍ-ᆅ⾲㛫䛾㊥㞳䛾ኚ໬ (cm)0 < ῝䛥 < 5 km
5 < ῝䛥 < 10 km

Analysis by GSI from ALOS-2 raw data of JAXAᖸ΅SAR䛷ᤊ䛘䛯2016ᖺ⇃ᮏᆅ㟈䛻క䛖ᆅ⾲ኚື䚹㯮ᐇ⥺䛿ኚື䛾୙㐃⥆⥺䠄⸨ཎ䜋䛛2016䠅䚹

2016ᖺ⇃ᮏᆅ㟈䛻䛚䛡䜛ᆅ⾲ኚື䛾୙㐃⥆⥺䛸㟈※ศᕸ䠄⸨ཎ䜋䛛2016䠅䚹

༡ⴠ䛱ᆅ⾲᩿ᒙ䠄ᕥ䠅ᆅ⾲ኚື䛾୙㐃⥆䜢ᢳฟ䠄㯮ᐇ⥺䠅䚹䠄ྑ䠅ᖸ΅SAR䛛䜙ᢕᥱ䛧䛯ୖୗኚ఩䛸ᚑ᮶䛾ᡭἲ䛻䜘䜛ά᩿ᒙ䛾఩⨨䚹໭ⴠ䛱ᆅ⾲᩿ᒙά᩿ᒙ䠄㕥ᮌ௚2017䠅䠏䠅2018ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈䠄M6.7䠅
㟈※䛜῝䛟䚸ᆅ⾲䜎䛷䛪䜜䛜฿㐩䛧䛯䛸䛿⪃䛘䜙䜜䜎䛫䜣䛜䚸㟈※䛾㏆䛟䛻⥺≧䛾ᆅ⾲ኚື䛜⌧䜜䜎䛧䛯䚹ά᩿ᒙ䛸䛿ㄆᐃ䛥䜜䛶䛔䛺䛔ఱ䜙䛛䛾ᆅୗ䛾ᵓ㐀䛜ཷືⓗ䛻ື䛔䛯ྍ⬟ᛶ䛜䛒䜚䜎䛩䚹䠐䠊ᖸ΅SAR䛷ぢ䛘䛶䛝䛯᪂䛯䛺ᆅ㟈ീ䠍䠅ᆅ⾲ኚື䛾ከᵝᛶᆅ㟈᫬䛻ᆅ⾲䛻䛥䜎䛦䜎䛺ኚື䛜⏕䛨䜛䛣䛸䛿ᚑ᮶䛛䜙▱䜙䜜䛶䛔䜎䛧䛯䛜䚸୺䛺䜒䛾䛿ᆅୗ䛾᩿ᒙ䛾䛪䜜䛜ᆅ⾲䜎䛷฿㐩䛧䛯ᆅ⾲ᆅ㟈᩿ᒙ䛸䚸ᆅୗ䛾䛪䜜䛻క䛔࿘㎶䛾ᆅ⾲䛜䝂䝮䛾䜘䛖䛻ኚᙧ䛩䜛ᙎᛶኚᙧ䛷ㄝ᫂䛷䛝䜛䛸⪃䛘䜙䜜䛶䛝䜎䛧䛯䚹䛧䛛䛧䚸ᖸ΅SAR䛻䜘䜚ᆅ⾲䛾ኚᙧ䛜㠃ⓗ䛻ヲ⣽䛻ᢕᥱ䛷䛝䜛䜘䛖䛻䛺䛳䛯䛣䛸䛷䚸ୖグ䛾䜘䛖䛺ཷືⓗ䛺᩿ᒙ䛾άື䛜ᆅ㟈᫬䛻ከᩘ㉳䛣䛳䛶䛔䜛䛣䛸䛜᫂䜙䛛䛻䛺䜚䛴䛴䛒䜚䜎䛩䚹䛣䛾䜘䛖䛺䛂䛚௜䛝ྜ䛔ᆅ㟈᩿ᒙ䛃䛿䚸䛭䜜⮬㌟䛜኱䛝䛺ᆅ㟈ື䜢Ⓨ⏕䛥䛫䜛䛣䛸䛿䛒䜚䜎䛫䜣䛜䚸ᆅ⾲䛾䛪䜜䛻䜘䜛⿕ᐖ䜔䚸ᆅ㟈ື䛾ቑᖜ䛺䛹䜢䜒䛯䜙䛩ྍ⬟ᛶ䜒䛒䜚䚸䛭䛾ᛶ㉁䛻
䛴䛔䛶௒ᚋㄪᰝ◊✲䜢㐍䜑䜛ᚲせ䛜䛒䜚䜎䛩䚹㟁Ꮚᇶ‽Ⅼ䛻䜘䜚ほ 䛥䜜䛯2016ᖺ⇃ᮏᆅ㟈䛻క䛖ᆅẆኚື䚹ᅜᅵᆅ⌮HP䜘䜚䚹⌧ᆅㄪᰝ䛷☜ㄆ䛥䜜䛯ᆅ⾲ኚື䠄Ᏹ᰿䜋䛛2017䠅䚹

2018ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈

2018ᖺ኱㜰ᗓ໭㒊䛾ᆅ㟈Mukawa▼⊁పᆅᮾ⦕᩿ᒙᖏ
town(ụ⏣௚ 2002)ᆅ⾲࡛ࡢࣜࢽ࢔࣓ࣥࢺ䖩 ᆅ㟈Ἴ᥈ᰝ࡛ồࡵࡽࢀࡓ㜿Ṋᒣaᆅୗࡢࡎࢀࡢ఩⨨(ᶓ಴௚ 2014)

AB

䖩 㟈ኸ

50150

a

ிӼ→50cிӼ→←ᙱӼ10000←ᙱӼ

-500500

1000 1500

50-5000500

100 b1ᙬ㒔す㥐䠎䠅ά᩿ᒙ䛾άືᛶ䛾ホ౯ཷືⓗ䛺ኚື䛭䛾䜒䛾䛿䚸୍ᗘ䛻኱䛝䛺䛪䜜䜢⏕䛨䜛䛣䛸䛿䛒䜚䜎䛫䜣䛜䚸䛣䛾䜘䛖䛺ኚື䛜⣼✚䛧䛶ᆅᙧ䜢ኚᙧ䛥䛫䛯䜚䚸ᆅᒙ䛻኱䛝䛺䛪䜜䛜⏕䛨䛥䛫䜛䛣䛸䛜䛒䜛䛣䛸䛜䚸㜿⸽໭す㒊䛾ㄪᰝ䛺䛹䛷᫂䜙䛛䛻䛺䜚䛴䛴䛒䜚䜎䛩䠄Ᏹ᰿䜋䛛2018䠅䚹ά᩿ᒙ䛾άື䛻ከᵝᛶ䛜䛒䜚䚸ྠ䛨ά᩿ᒙ䛻⬟ືⓗ䛺άື䛸䛔䜟䜀䛚௜䛝ྜ䛔䛾ཷືⓗ䛺άື䛾䛹䛱䜙䜒㉳䛣䜚䛖䜛䛸䛩䜜䜀䚸ά᩿ᒙ䛜୍ᐃ䛾㛫㝸䛷୍ᐃ䛾つᶍ䛾άື䜢⧞䜚㏉䛩䛣䛸䜢๓ᥦ䛸䛧䛶䚸䝖䝺䞁䝏䛛䜙ᚓ䛯άືᒚṔ䛛䜙άືᛶ䜢ホ౯䛩䜛䛣䛸䛿㐺ษ䛷䛺䛔ྍ⬟ᛶ䛜䛒䜚䜎䛩䚹᪂䛯䛺ホ౯ᡭἲ䛻䛴䛔䛶௒ᚋㄪᰝ◊✲䜢㐍䜑䜛ᚲせ䛜䛒䜚䜎䛩䚹ㅰ㎡
䛰䛔䛱2ྕ䛾ほ 䝕䞊䝍䛿䠈ᆅ㟈ண▱㐃⤡఍SARゎᯒ䝽䞊䜻䞁䜾䜾䝹䞊䝥䜢㏻䛧䛶JAXA
䛛䜙ᥦ౪䛥䜜䛯䜒䛾䛷䛩䚹ゎᯒ䠖ᅜᅵᆅ⌮㝔 ཎึ䝕䞊䝍ᡤ᭷䠖JAXA

5040 ㉥ ‽ୖྥࡁኚ఩
(mm, ᕥࢫࢣ࣮ࣝ)30⥳ ‽すྥࡁኚ఩
20 (mm, ᕥࢫࢣ࣮ࣝ)10 ࢜ࣞࣥࢪ ᶆ㧗(m, ྑࢫࢣ࣮ࣝ)01000 1500
150
10050
ிӼ→500←ᙱӼ

0100b1ᦤὠᐩ⏣㥐

50

⟪㠃㥐

1000

2000

3000

4000

b2

0
100

Cb2

Ⲉᮌ㥐

100
50

ᅜᅵᆅ⌮㝔

ά᩿ᒙᅗ㸦ᒸ⏣࡯࠿ࠊ2008㸧
Ɫᑠ∾

2018ᖺ኱㜰ᗓ໭㒊䛾ᆅ㟈䛻క䛖ᆅ⾲ኚື䛾୙㐃⥆⥺䠄㉥⥺䠅䛸ᚑ᮶䛾ᡭἲ䛻䜘䜛ά᩿ᒙ䛾఩⨨䠄⸨ཎ䜋䛛2018䠅䚹

2000

b3

3000

4000

0150

ɥӼ ↑

ிӼ→50

100
50
←ᙱӼ

-50
0

ᨭ➖†

㯮Ⅼ⥺

←ᙱӼ

1000

0c

༓㔛୰ኸ㥐

b3

1000

すЋ

2000

3000

Ỉᖹ㊥㞳 (m)

4000

5000

Ѝᮾᆅ⾲ኚື䛾୙㐃⥆⥺䠄㟷⥺䠅䜢ᶓษ䜛ᆅ⾲ኚື䛸ᆅᙧ䛾᩿㠃ᅗ2018ᖺ໭ᾏ㐨⫹᣺ᮾ㒊ᆅ㟈䛻క䛖ᆅ⾲ኚື䛾୙㐃⥆⥺䠄㟷⥺䠅䛸ᚑ᮶䛾ᡭἲ䛻䜘䜛ά᩿ᒙ䛾఩⨨䠄⸨ཎ䜋䛛2019䠅䚹

0150

ிӼ→0

ᮐᖠ

5000

0