|
Kick 'em Jenny (also: Kick-'em-Jenny or Mt. Kick-'Em-Jenny) is an active submarine volcano or seamount on the Caribbean Sea floor, located north of the island of Grenada and about west of Ronde Island in the Grenadines. Kick-'em-Jenny rises above the sea floor on the steep inner western slope of the Lesser Antilles ridge. The South American tectonic plate is subducting the Caribbean tectonic plate to the east of this ridge and under the Lesser Antilles island arc.〔(【引用サイトリンク】title=Kick em' Jenny-Home )〕 ==Activity== The first record of the volcano was in 1939,〔Lopes, Rosaly M. C. (2005), (''The volcano adventure guide'' ), Cambridge University Press, Illustrated ed. p. 11. ISBN 0-521-55453-5〕 although it must have erupted many times before that date. On 23–24 July 1939 an eruption broke the sea surface, sending a cloud of steam and debris into the air and generating a series of tsunamis around two metres high when they reached the coastlines of northern Grenada and the southern Grenadines. A small tsunami also reached the West coast of nearby Barbados, where 'a sea-wave' suddenly washed over a coastal road. The volcano has erupted on at least twelve occasions between 1939 and 2001 (the last being on December 4, 2001), although none of the eruptions have been as large as the 1939 one, and most were only detected by seismographs. The larger eruptions have also been heard underwater or on land close to the volcano as a deep rumbling sound.〔 A submersible survey in 2003 detected a crater with active fumaroles releasing cold and hot gas bubbles. The summit was measured to be below the sea surface and is thought to have remained constant since the 1960s.〔 Samples of fresh olivine basalt were collected. An arc shaped collapse structure appears on the west flank and was the apparent source of a submarine debris avalanche extending 15 km down the ridge slope to the west toward the Grenada Basin. Signs of elevated seismicity began July 11, 2015, and on July 23 a strong continuous signal was recorded by instruments observing Kick 'em Jenny, prompting authorities to raise the alert level to orange, which is the second-highest level. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kick 'em Jenny」の詳細全文を読む スポンサード リンク
|