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根据美国Smithsonian研究院全球火山计划发布的火山喷发年表,提取了1750-2010年逐次强火山喷发(火山爆发强度指数VEI≥4)事件的详细资料,按照地理纬度、海拔高度、发生年份及月份等要素进行分类统计,分析了1750年以来的全球强火山喷发的主要特征。结果表明:1750-2010年间强火山喷发多集中于环太平洋火山带以及苏门答腊岛—爪哇岛火山带上,并以赤道两侧地区(10°N~10°S)最多;1000~2000 m海拔高度上易多发强火山喷发事件;1月和4月是强火山喷发最为集中的月份,夏半年(4-9月)较冬半年(10月-次年3月)发生次数略多;强火山喷发具有15~25年和35~50年的年代际周期,且1870年以后强火山喷发周期变化较之前更为频繁,其中1750-1760年、1776-1795年、1811-1830年、1871-1890年、1911-1920年及1981-1995年强火山事件相对多发,其他时段则相对少发。
According to the volcanic eruption schedule published by the Smithsonian Institute Global Volcano Plan, the detailed data of successive eruptive volcanic eruptions (volcanic eruption intensity index VEI≥4) from 1750 to 2010 were extracted. According to geographical latitude, altitude, year and month And other elements of the classification statistics, analysis of the main characteristics of the global strong volcanic eruption since 1750. The results show that the strong volcanic eruptions concentrated in the Pacific Rim volcanoes and the Sumatra-Java volcanic islands between 1750 and 2010 and are dominated by the two sides of the equator (10 ° N ~ 10 ° S) and 1000 ~ 2000 m above sea level In January and April, the most intense volcanic eruptions were the most frequent months, with slightly more occurrence in the summer half year (April-September) than in the winter half-year (October-March); strong volcanic eruptions With 15 to 25 years and 35 to 50 years of interdecadal cycles and strong volcanic eruption cycles after 1870 more frequently than before, of which 1750-1760, 1776-1795, 1811-1830, 1871-1890 The volcanic events of 1911-1920 and 1981-1995 were relatively frequent while those of other volcanoes were relatively rare.