富士火山のテフラ層序学的噴火予測 (災害とその予測--第4紀研究の果たす役割<特集>)
スポンサーリンク
概要
- 論文の詳細を見る
Some inductive inferences on the future eruption of Fuji Volcano were drawn mainly from tephrostratigraphic data. The following are the main points:(1) The next eruption may be expected to be large-scale. More than 287 years in a weakened and dormant stage since the last eruption in AD1707 is sufficient for magma build up on a large-scale in view of the long eruption interval (270 years) since the birth of the Younger Fuji Volcano 10, 500 years BP.(2) Based on historical records since AD684, the next eruption or magma rise may be expected to be triggered by large-scale earthquakes along the northwestward subduction zone from the Nankai-Suruga Troughs, which are preceded by eruptions in the northern Izu volcanic islands along the western edge of the Sagami Trough and the Japan Trench.(3) Tephrostratigraphic records since 16, 000 years BP indicate that the central cone eruptions at Hakone Volcano and the dislocations of NS trending left lateral active faults-that is, the Hirayama fault and the north Izu fault system which cut across Hakone Caldera-were often synchronous or linked with the eruptions of Fuji Volcano.It would be useful to monitor Hakone Volcano and these faults from that point of view.(4) The Younger Fuji originated from the NNW-SSE trending rift zone, from which huge quantities of lava flowed out. The center of effluents shifted to the northwest as a general trend. Then the Younger Fuji gradually evolved into a stratovolcano and attained its climax as a beautiful conical volcano. It has been transformed into an aggregate of parastic cones, fissures and explosion craters since the plugging up to the summit crater 2, 200 years BP.Therefore, the next eruption may be expected to break out not at the summit crater but on the flank. The northwestern flank may be the main occurrence point on the accounts of the time-space transition trend of parastic eruptions since 3, 100 years BP.
著者
関連論文
- 足柄地域北西部における中期更新世以降の断層活動 : プレート力学境界表層部での変形過程の例
- 56A. 上部足柄層群生土(いくど)火砕流(約 70 万年前)とその給源火山(日本火山学会 1985 年度秋季大会講演要旨)
- 足柄層群中・上部層の地質構造 : 構造地質
- P06 富士火山東麓,上柴怒田における掘削調査の概要(ポスターセッション,日本火山学会2007年秋季大会)
- 関東地方の第四紀構造盆地の形成過程に関する一考察
- 多摩上部ローム層と「下末吉層」との層序関係 : 第四紀
- いわゆる二宮層の区分と対比について : 第四期
- PB12 富士山東斜面におけるスコリア層の層序と化学組成の時間変化
- P24 富士火山における掘削調査(その 2) : FJ-4 (山中湖沿岸)コアの層序
- 相模湾周辺の遺跡から検出された地震跡
- A65 古期大島層群中に現れる白色テフラについて
- 50A. 富士系テフラの鉱物組成の変遷(日本火山学会 1985 年度春季大会講演要旨)
- 富士黒土層の^C年代
- 神奈川県大磯丘陵雑色(ぞうしき)に見られる多摩ローム層のとう曲露頭 : 構造地質
- 富士山東麓の沖積世ロ-ム層
- 伊豆大島火山千波崎の地層切断面露頭群のテフラ--標準柱状図
- 富士火山のテフラ層序学的噴火予測 (災害とその予測--第4紀研究の果たす役割)
- 新富士火山最新期のテフラ--その細分と年代
- 丹沢南部・大磯丘陵周辺における中期更新世以降の断層活動 (南部フォッサマグナ・フィリピン海プレ-ト北縁のネオテクトニクス)
- 川音川横すべり断層-大磯丘陵北西縁の活断層
- 富士山,北・東麓の完新世テフラ累層中の斜交関係 (関東平野における第四紀後期の環境変化と文化の発達)
- タイトル無し