你知道東北部地震帶,其實是來自「沖繩海槽」的擴張嗎?
除了板塊交界處和隱沒帶這兩個字眼,我們應該知道更多孕震構造的可能原因!
*本文轉載自合作夥伴 報地震 - 中央氣象局
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8 月初宜蘭外海凌晨發生規模 6.1 地震,地震原因並非大家所熟悉的 #板塊隱沒,而是來自沖繩海槽的 #弧後擴張 。
#來自沖繩海槽的打招呼
當菲律賓海板塊向北隱沒後,我們將隱沒的下陷處稱為 #琉球海溝,隨著板塊逐漸隱沒,在高溫、高壓的地底深處就可能形成 #部分熔融 或脫水作用此流體開始上升,最後在琉球海溝的北方噴發,形成了一連串的火山島,包含龜山島在內,這些火山島就是我們熟悉的 #琉球島弧。
到了琉球島弧的後方(北方),歐亞板塊在此處可能受到了南邊隱沒的力量拉扯、地底熱對流 的影響,使得板塊開始張裂、海床深度變深,就像是在海底形成一個凹陷的水槽,我們將它稱為「#沖繩海槽 (Okinawa Trough)」。
在隱沒系統中,由於這個凹陷的地形位在島弧的後方,又可以被稱為「弧後盆地」,而這個弧後盆持續張裂的行為,就是「弧後擴張」。
#熟悉又陌生的東北部地震帶
當我們提到臺灣的地震時,在臺灣三大主要地震帶中,大多只會想到因板塊碰撞而產生的東部地震帶,以及造成重大災害的淺層西部地震帶。
事實上,由沖繩海槽擴張作用引起的淺層地震區也隸屬於三大地震帶之一,屬於 #東北部地震帶。
臺灣可是有高達 70% 的地震都在這裡發生呢!其範圍從蘭陽溪上游附近開始,經宜蘭向東北延伸到琉球群島。
此處地震大多呈現張裂型,也就是 #正斷層 的樣態,多為 #淺層地震,震源深度小於 70 公里,除了地震外,也伴隨有地熱與火山活動(如龜山島附近)的現象唷!
現在,大家對於弧後擴張的地震有更了解一點了嗎?
延伸閱讀:
隨處發生的地震?!—什麼是地震帶?(下)
https://reurl.cc/O0ZrmR
Sibuet, J. C., Letouzey, J., Barbier, F., Charvet, J., Foucher, J. P., Hilde, T. W., ... & Stéphan, J. F. (1987). Back arc extension in the Okinawa Trough. Journal of Geophysical Research: Solid Earth, 92(B13), 14041-14063.
Letouzey, J., & Kimura, M. (1985). Okinawa Trough genesis: structure and evolution of a backarc basin developed in a continent. Marine and Petroleum Geology, 2(2), 111-130.
同時也有2部Youtube影片,追蹤數超過12萬的網紅一二三渡辺,也在其Youtube影片中提到,At this point even the roadside station needle terrace of meeting in run in address V100 because it is scheduled to go to have a haircut and is not po...
structure basin 在 一二三渡辺 Youtube 的最佳解答
At this point even the roadside station needle terrace of meeting in run in address V100 because it is scheduled to go to have a haircut and is not possible to participate in the touring to the last minute because the cousin holds the wedding on the 15th on that day though the invitation of Mr. and the touring was received. 9:30 ・・・ It is not in time ・・・ a large sweat ・・・ Change the schedule, and to coffee shop "Mausoleum" ・・・
The Takeuchi highway (Of excellence very) is toward from Osaka Prefecture Sakai City to the east, exceeds the south foot and Takeutitouge of Mt. Nijo-san, and is a highway of about 26km to the vicinity of the Nagao Shinto shrine of the Nara Prefecture Katsuragi city.
As for the section to the vicinity of the Takeuchi village, from the swan intersection in Habikino City to the Katsuragi city, most the districts are specified for No.166 in the national road.
Structure and history
* The Takeuchi highway is the oldest "Miti" in Japan recorded in the article of Nohonshoki of 21 years (613 years) in Empress Suiko, "A large road (uncle) from Nanba to the capital (Asuka) is put". The majority comes in succession in a present Takeuchi highway with Miti in the Empress Suiko age. The east side is connected with the Mitiyoco Main Street where the southern part of the Nara basin is crossed from east to west. It was called Himiti () before. Because Hino is crossed, it is presumed to be given of the name.
Animation to love each other
http://jp.youtube.com/watch?v=KJD-THocumA&feature=channel_page
It is lovely.
http://jp.youtube.com/watch?v=1gdeAoOvyEo&feature=channel_page
It is a beautiful woman dog.
http://jp.youtube.com/watch?v=rmQISVaOmSw&feature=channel_page
ともさんからツーリングのお誘いを受けましたが、
当日は、従妹が15日の結婚式をあげるので、
散髪に行く予定があり最後までツーリングには参加できないので、待ち合わせの道の駅 針テラス迄、アドレスV100で,
爆走中、この時点で。9時半・・・間に合わない・・・大汗・・・予定を変更し、喫茶店「陵」に・・・
竹内街道(たけのうちかいどう)は、大阪府堺市から東へ向かい、二上山の南麓・竹内峠を越えて、奈良県葛城市の長尾神社付近に至る約26kmの街道である。
羽曳野市の白鳥交差点から葛城市の竹内集落付近までの区間は、そのほとんどの区域が国道166号に指定されている。
成り立ち・歴史
* 竹内街道は日本書紀の推古天皇二十一年(613年)の条に「難波より京(飛鳥)に至る大道(おおじ)を置く」と記されていた、日本最古の「官道」。 現在の竹内街道は、大部分は推古天皇時代の官道と重なっている。東側は奈良盆地南部を東西に横切る官道横大路につながっている。 かつては丹比道(たじひみち)と言われた。丹比野を横断するのでその名が付いたと推定されている。
愛し合っている動画、
http://jp.youtube.com/watch?v=KJD-THocumA&feature=channel_page
可愛いです、
http://jp.youtube.com/watch?v=1gdeAoOvyEo&feature=channel_page
美女犬です、
http://jp.youtube.com/watch?v=rmQISVaOmSw&feature=channel_page
structure basin 在 一二三渡辺 Youtube 的最佳貼文
The Takeuchi highway (Of excellence very) is toward from Osaka Prefecture Sakai City to the east, exceeds the south foot and Takeutitouge of Mt. Nijo-san, and is a highway of about 26km to the vicinity of the Nagao Shinto shrine of the Nara Prefecture Katsuragi city.
The section to the vicinity of the Takeuchi village from the swan intersection in Habikino City to the Katsuragi city is structure and a history from which most the districts are specified for No.166 in the national road.
* The Takeuchi highway is the oldest "Miti" in Japan recorded in the article of Nohonshoki of 21 years (613 years) in Empress Suiko, "A large road (uncle) from Nanba to the capital (Asuka) is put". The majority comes in succession in a present Takeuchi highway with Miti in the Empress Suiko age. The east side is connected with the Mitiyoco Main Street where the southern part of the Nara basin is crossed from east to west. It was called Himiti () before. Because Hino is crossed, it is presumed to be given of the name. It is understood to see the article on the Ten July 1 of the first year , saying that "A great number of multi of the war arrives from Miti at the association discernment if the west is faced and seen ..Otsu and ratio.. ..both.. drinking..", and to have been used also for the war of Monkey, and is presumed that it is Takeuchi highway with the Nagao highway.
* It is thought that this road was an east and west road to which the Furuichi old tomb group and the shrike bird old tomb group almost run in the center part, and the road where two old tomb groups tie. It is thought that it was constructed delaying behind the Nagao highway. Moreover, it touches the part forward at the edge of the southeast in the Oyama old tomb in yen part and it will go after the Honda Mt. old tomb south end if this highway is extended from east to west as a straight road. In a word, it is understood that these two huge old tombs are made on the north latitude line on the map.
* It seems that there was already traffic of considerable people because a lot of ruins in the mausoleum grave and the old tomb, etc. spent in the fifth century in the fourth century remained in the west foot (present Osaka Prefecture Taishi-cho) in Mt. Nijo-san though it is about beginning of the seventh century to be maintained as Miti as shown in the above-mentioned.
* Yatsca envoy and the monk of going abroad to study come and go in the Asuka age, and the culture from the continent to China and Korea is brought, and it is and of the Asuka culture.
* It continues partially of the Ise highway in the Middle Ages, and No.166 in the national road is going now. Therefore, the Takeuchi highway will be being used as a highway between the Asuka age and present.
* Matsuo Basho lived in the Takeuchi village in the route for a certain period of time in Edo period. There is Watayumitsca of the Basho monument there, and it is maintained as a park now.