!飛騨山脈石油ボーリング越後山脈陸上地形図は北海道地図株式会社から提供、海底地形図は海上保安庁WebGIS海洋台帳より作成フォッサマグナの範囲は植村 武（1988）共立出版を参考に作図糸魚川柏崎静岡関東山地佐渡白馬岳谷川岳千葉五頭山赤石岳富士山八ヶ岳焼山脈山後越脈山石赤脈山騨飛古い岩石古い岩石古い岩石古い岩石新しい岩石新しい岩石古い岩石■The Fossa Magna is a "Great Rift"A large geological rift runs through the center of the Japanese Islands. It was discovered by German geologist Dr. Heinrich Edmund Naumann, who named it the "Fossa Magna", which in Latin means "Great Rift". It is thought to be a geological "scar" left on the Japanese Islands when they cracked as they separated from the Asian Continent.■The Itoigawa-Shizuoka Tectonic LineThe Itoigawa-Shizuoka Tectonic Line is a fault which cuts through the center of the Japanese Islands and forms the western boundary of the Fossa Magna. It divides Japan geologically between East and West, and is thought to be the boundary between the North American and Eurasian plates.Even now, the sinking of the Pacific Plate beneath the North American Plate causes the Japanese Islands to be compressed in an east-west direction. As a result, the mountains rise higher and the rocks which make up the Japanese Islands fracture along fault lines. Faults which are thought to be still moving are called active faults. When these faults move, it causes earthquakes.The Fossa Magna and the Itoigawa-Shizuoka Tectonic LineItoigawaUNESCO Global GeoparkUnited NationsEducational, Scientic andCultural Organization活断層（陸）Active Fault (Land)活断層（海底）Active Fault (Sea Bottom)被害地震の震央Epicenter of Destructive Earthquake地震発生年,マグニチュードYear, Magnitude1855,M7.0-7.5Past Earthquakes in the Fossa Magna RegionThis is the Fossa Magna!The Fossa Magna, Fissure of the Japanese Islandsぬーなジオまるフォッサマグナアジア大陸日本列島佐渡ユーラシアプレートユーラシアプレートユーラシアプレートユーラシアプレート西日本東日本フィリピン海プレートフィリピン海プレート糸魚川太平洋プレート約2000万年前約1700万年前約1600万年前現在太平洋プレート太平洋プレート太平洋プレート北アメリカプレート北アメリカプレート隠岐① まだ大陸の一部Part of Asian ContinentAsian ContinentJapanese IslandsPacic PlatePacic PlatePacic PlatePacic PlateOld RocksOld RocksOld RocksOld RocksOld RocksYoung RocksYoung RocksKanto MountainsMt. AkaishidakeMt. ShiroumadakeMt. YakeyamaMt. YatsugatakeMt. FujiYoung VolcanoesMt. TanigawadakeangaM assoFFossaMagnaMt. GozusanHida MountainsEchigo MountainsOil DrillingItoigawaChibaShizuokaKashiwazakiKashiwazaki-Chiba Tectonic LineKashiwazaki-Chiba Tectonic LineItoigawa-Shizuoka Tectonic LineItoigawa-Shizuoka Tectonic LineShibata-Koide Tectonic LineSadoHida MountainsAkaishi MountainsEchigo MountainsEurasian PlateEurasian Plate20 million years ago17 million years ago16 million years agoPresentGeomaruEurasian PlateEurasian PlateEastern JapanWeatern JapanFossa MagnaPhilippine Sea PlatePhilippine Sea PlateItoigawaフィリピン海プレートPhilippine Sea PlateNorthAmericanPlateNorthAmericanPlateOkiSado② 日本列島の誕生Birth of Japanese Islands③ 裂けて海峡になるBroken into ChannelバキッCrack!④ 海峡が地層で埋め立てられるChannel Filled Up by Strata「地震だねっと！」（QRコード）にアクセスすると、今の糸魚川周辺の地震活動がわかります。私たちが気づかない地震は、今も地下でたくさん起こっています。1898,M5.92011,M6.4715,M6.5-7.51718,M7.01967,M5.21916,M6.21912,M5.71986,M4.91912,M5.111918,M6.11858,M5.71986,M5.91853,M6.51627,M6.01847,M7.41941,M5.11919,M5.42011,M5.61738M5.52011M6.72011M4.92011M5.92001M5.31951,M5.01971M5.52010M4.71847M6.52001M4.51502,M6.5-7.01751M7.0-7.41983,M5.31969,M5.31984,M6.81984,M6.21914M5.71666M6.81934,M5.6863(?)1886,M5.32011,M5.31905M5.21898,M6.11904,M6.11933M6.12005M5.02004M6.82004M6.52004M5.72004,M6.12004M6.01968,M5.31943,M5.91714,M6.32014,M6.71897,M5.2,5.41941,M6.11965-70,M6.5max1918,M6.51998,M5.01903,M5.51890,M6.21961,M4.91908,M5.81902M5.41984M5.21929,M6.32001M4.61649,M7.01791,M6-6.51931,M6.31907M6.01923M6.31856,M6.0-6.51615M6.3-6.8M66.51630,M6.31630,M6.316,1635,M6.01767,M6.01894,M7.01855,M6.91956,M5.9855M691892,M6.2,1894,M6.7894,M66.781181909,M6.11906,M6.41913,M6.01812,M6.31697M6.51923M6.61923M6.21649,M6.41926,M6.31889,M6.0878M7.41924,M7.31931,M6.31983,M6.01887M6.21859,M6.01968,M6.11931,M6.91885,M6.01915,M5.91976,M5.51918,M6.31728,M7.01923,M6.61923,M6.32011,M4.61923,M6.81996,M5.51891,M6.51923,M6.21843,M6.51853,M6.71917,M4.51920,M5.7841,M71857,M6.31589,M6.72009M6.51935,M6.41965,M6.11841,M6.31978,M5.81976M5.41978M4.91930,M7.31633,M7.01817M6,1870,M6-6.516166331870808080880,M6,6,6,6.666,M112007,M4.91786M5-5.51923M6.07.01257M7-7.51648M7.01923,M7.91923,M6-6.51433,>M71923,M6.61922,M6.81992,M5.71923,M6.21906,M6.31923,M6.41930,M6.11801M6.51923,M6.01923,M7.31938,M6.11921,M7.01944,M6.11923M6.01974M5.82005M5.31996M5.61911,M6.01922M5.92004M5.71943,M6.01895,M7.21725,M6.01898,M5.61897M5.62011M5.02011,M4.81923M6.12014M5.61924,M6.61888,M6.01683,M7.02013,M6.31755,M?1683,M6.5-7.01949,M6.41949,M6.21683,M6.0-6.51659,M6.8-7.01944,M5.51964,M7.51762,M7.01802,M6.5-7.02012,M5.71964,M6.11670,M6.81995,M5.61828,M6.92007,M6.82007,M5.81887,M5.71927M5.21961,M5.21611,M6.91936,M4.11943,M6.21821,M5.5-6.01915M6.01956,M6.31913M1913M6.02005,M6.01951M6.11923,M7.01880M5.5-6.01952M6.02007M4.81982,M5.71964,M5.51964,M5.31930,M5.91996,M5.52009,M5.11980,M6.71978,M5.41961,M4.61923M5.941905,M5.81972,M3.81978M7.01703,M7.9-8.21934M5.51725,M6.8841,M6.5<1791,M6.8715,M6.5-7.51997,M5.91686,M6.5-7.01983,M5.71917,M6.32001,M5.3新潟津川会津若松米沢郡山山形柏崎三条佐渡村上小出十日町湯沢上越糸魚川白馬魚津長野大町松本小諸諏訪飯田甲府高崎宇都宮さいたま横浜千葉浜松静岡沼津長岡新発田フォッサマグナFossa Magnaフォッサマグナ太平洋プレートPacic PlatePhilippine Sea PlateEurasian PlateNorth AmericanPlateユーラシアプレート北アメリカプレートフィリピン海プレート今、起きている地震をみてみよう！On the website "NIED Quake Map!," you can see the many earthquakes which occur beneath the Itoigawa UNESCO Global Geopark area. Most of these earthquakes are too small to be felt by people. Access it on your phone using the QR code above.Japan is continuouly being pushed by the massive forces of four tectonic plates!Check out the recent earthquake activity!おもな新しい火山国立研究開発法人防災科学技術研究所National Research Institute for Earth Science and Disaster Resilience糸魚川ItoigawaThe Fossa Magna is a rift which formed millions of years ago when the Japanese Islands were born!ユーラシアプレート北アメリカプレート太平洋プレートEurasian PlatePacic PlateNorth American PlateItoigawa-Shizuoka Tectonic LineActive faultMountainsMountainsEarthquake地震活断層山脈山脈Nunaフィリピン海プレートPhilippine Sea Plateさたんじょうかいきょうちそうう30QR!!「防災科研 地震だねっと！」の公開地震津波火山ネットワークセンター 松原誠・西澤あずさ・青井真2019.02.22 平成30年度 成果発表会
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