SGER: Heat Flux at Mount Wrangell Following the November 3, 2002 Denali Fault Earthquake

SGER：2002 年 11 月 3 日德纳利断层地震后兰格尔山的热通量

• 批准号: 0326083
• 负责人: Stephen McNutt
• 金额: $ 2.09万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0326083&HistoricalAwards=false
• 关键词: SGER; Heat; Flux; Mount; Wrangell

EAR-0326083McNuttThis research will investigate the connection between large earthquakes and volcanic heat flux on Mt. Wrangell Volcano, Alaska. Changes in heat flux have previously been observed at Mt. Wrangell following large earthquakes in 1964 and 1979. The earthquake of 3 November 2002 on the Denali Fault, Mw = 7.9, may have had a similar or stronger effect on heat flux because the shaking was more intense. The hypothesis to be tested is that seismic shaking opens convective channels beneath the ice-filled North Crater. This in turn allows glacier melt water to circulate more efficiently, and deeply enough to increase heat flux to the base of the glacier ice. This shows up as a change in the ice volume, which will be measured by photogrammetry in summer 2003. Seismic behavior will also be monitored with stations on the volcano's summit and flanks. In terms of broader impacts, this proposal crosses three disciplines--volcanology, glaciology and seismology-and seeks to establish a physical basis for interactions among these generally separate lines of inquiry. Two UAF graduate students will be involved in the data and interpretations, and public lectures will be given in the Glenallen and Copper Center communities, as well as at the Wrangell-St. Elias National Park visitor center.

这项研究将调查大地震和火山热通量之间的联系。兰格尔火山，阿拉斯加。以前曾在Mt. 1964年和1979年发生大地震后的兰格尔。2002年11月3日发生在德纳里断层上的地震，Mw = 7.9，可能对热通量产生了类似或更强的影响，因为震动更强烈。要测试的假设是，地震震动打开了冰填充的北火山口下的对流通道。这反过来又使冰川融水能够更有效地循环，并且足够深，以增加冰川冰底部的热通量。这表现为冰量的变化，将在2003年夏天通过摄影测量进行测量。地震行为也将监测站在火山的顶峰和侧翼。就更广泛的影响而言，这一提议跨越了三个学科火山学、冰川学和地震学，并试图为这些通常独立的研究领域之间的相互作用建立一个物理基础。两名UAF研究生将参与数据和解释，并将在格伦艾伦和铜中心社区以及兰格尔圣埃利亚斯国家公园游客中心举行公开讲座。