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Mount Bulusan, or Bulusan Volcano, is the southernmost volcano on Luzon Island in the Republic of the Philippines. It is situated in the province of Sorsogon in the Bicol region, southeast of Mayon Volcano and approximately southeast of the Philippine capital of Manila. It is one of the active volcanoes in the Philippines. ==Physical features== Bulusan is classified by volcanologists as a stratovolcano (or a composite cone) and covers the northeast rim of Irosin caldera that was formed about 40,000 years ago. It has a peak elevation of above sea level with a base diameter of . Located around the mountain are four craters and four hot springs. The first crater, called Blackbird Lake, is in diameter and deep. The second crater is oval, with dimensions of and . The third crater is about in diameter and deep, while the fourth, which is near the northeastern rim opened during the 1981 eruption. There is also a fissure measuring wide below this crater. Its hot springs are San Benon Springs, Mapaso Springs, San Vicente Springs, Masacrot Springs. Its adjacent volcanic edifices are Mt. Homahan, Mt. Binitacan, Mt. Batuan, Mt. Calungalan, Mt. Calaunan, Mt. Tabon-Tabon, Mt. Juban, and Mt. Jormajan. 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「Mount Bulusan」の詳細全文を読む スポンサード リンク
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