...
【24h】

Preface

机译:前言

获取原文
获取原文并翻译 | 示例
           

摘要

Volcanoes are 'challenging' features to observe because of the various types of volcanic activity, the variable frequency of volcanic events and the possible harm to observers. Volcanic activity is inherently hazardous; it may involve localized earthquakes, explosive eruptions, lava at temperatures of up to 1000℃, large landslides, nuee ardent ash flows (moving at 10-100 ms~(-1) and with temperatures of 300-500℃), lahar mudflows tens of metres thick, widespread ash-fall and emissions of gasses, some of such magnitude that they affect the climate of the planet. Even without ongoing volcanic activity, volcanic terrain is typically difficult to access and survey, with steep slopes and dense vegetation, unstable debris deposits and blocky lava flows, plus zones of friable hydrothermally altered rock.
机译:由于各种类型的火山活动,变化的火山事件频率以及可能对观察者造成的伤害,火山的观测具有“挑战性”。火山活动具有固有的危险性;它可能涉及局部地震,爆炸爆发,温度高达1000℃的熔岩,大的滑坡,新的热灰流(以10-100 ms〜(-1)和300-500℃的温度移动),拉哈泥流数十几米厚的灰烬和大量的气体排放,这些气体的数量足以影响地球的气候。即使没有正在进行的火山活动,火山地带通常也难以进入和测量,其陡峭的斜坡和茂密的植被,不稳定的碎屑沉积物和块状的熔岩流,以及易碎的热液蚀变岩石区。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号