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File:Volcanoes near Usulután, El Salvador.jpg

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原始檔案 (4,037 × 3,525 像素,檔案大小:6.59 MB,MIME 類型:image/jpeg


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描述
English: This astronaut photograph includes four stratovolcanoes—a type of volcano common in active subduction zones—in El Salvador, near the midpoint of the Central American Volcanic Arc. While all of the volcanoes shown here have been active during the Holocene Epoch (from about 10,000 years ago to the present), only the 2,130-meter high San Miguel (also known as Chaparrastique) has been active during historical times. The most recent activity of San Miguel was a minor gas and ash emission in 2013. The stratovolcano’s steep cone shape and well-developed summit crater are evident, along with dark lava flows. Immediately to the north-west, the truncated summit of Chinameca Volcano (also known as El Pacayal) is marked by a two-kilometre wide caldera. The caldera formed when a powerful eruption emptied the volcano’s magma chamber, causing the chamber’s roof to collapse. Like its neighbour San Miguel, Chinameca’s slopes host coffee plantations. Moving to the west, the eroded cone of El Tigre Volcano is visible. El Tigre formed during the Pleistocene Epoch (1.8 million to about 10,000 years ago), and it is likely the oldest of the stratovolcanoes in the image. Usulután Volcano is directly south-west of El Tigre. While the flanks of Usulután have been dissected by streams, the mountain still retains a summit crater that is breached on the eastern side. Several urban areas—recognizable as light grey to white regions contrasting with green vegetation and tan fallow agricultural fields—are located in the vicinity of these volcanoes, including the town of Usulután (lower left) and Santiago de María (upper left).
日期
來源 NASA Earth Observatory
作者 NASA Expedition 23 crew
拍攝地點13° 24′ 00.1″ 北, 88° 17′ 59.9″ 西 Kartographer map based on OpenStreetMap.位於此地的本圖片與其他圖片: OpenStreetMapinfo
本圖像或影音收錄於美國國家航空暨太空總署 (NASA)休士頓太空中心(Johnson Space Center),其照片編號為: ISS023-E-22411

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Image acquired with a Nikon D3X digital camera fitted with an effective 340 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center.

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Public domain 本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zhNASA版權政策JPL圖像使用政策
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遠征23 繁體中文 (已轉換拼寫)

視角坐標 繁體中文 (已轉換拼寫)

13°24'0.101"N, 88°17'59.899"W

攝影器材 繁體中文 (已轉換拼寫)

尼康D3X 繁體中文 (已轉換拼寫)

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目前2010年4月26日 (一) 11:10於 2010年4月26日 (一) 11:10 版本的縮圖4,037 × 3,525(6.59 MB)Originalwana{{Information |Description={{en|1=This astronaut photograph includes four stratovolcanoes—a type of volcano common in active subduction zones—in El Salvador, near the midpoint of the Central American Volcanic Arc. While all o

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