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Seguam Island () is a small volcanic island in the Andreanof Islands group in the Aleutian Islands of Alaska. The island is mountainous and oval shaped with a land area of . It is long and wide. The 2000 census reported a population of one person. The island consists of several overlapping stratovolcanoes, and it contains two calderas each with central volcanic cones. About 10 historical eruptions have been recorded since the late 18th century, the most recent in 1993. All recent activity has occurred at Pyre Peak, the cone within the western caldera and the highest point on the island, and has produced explosive eruptions and basaltic lava flows. == References == * * (Alaska Volcano Observatory: Seguam Island ) * (Seguam Island: Block 1083, Census Tract 1, Aleutians West Census Area, Alaska ) United States Census Bureau 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「Seguam Island」の詳細全文を読む スポンサード リンク
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