Seismic Explorations in the Eastern Aleutians, Alaska

摘要: In the summer of 2001 two groups from Alaska Volcano Observatory (AVO) deployed temporary seismic stations in areas on Umnak Island, (Figure 1). For AVO, such deployments are exception rather than rule. AVO operates a real-time network 135 25 40+ historically active volcanoes (Dixon et al. , 2002), spanning distance just less 2,300 km This span encompasses one most volcanically and seismically arcs world. AVO's traditional emphasis has been to study seismicity associated with volcanic processes through installation permanent networks analysis resultant signals its laboratories Anchorage Fairbanks. Little placed deployments, for three reasons: (1) mission-critical goal is provide near-real-time assessments activity Alaska, not readily served by because time required their deployment data often stored on-site thus available monitoring; (2) logistical considerations (travel shipping expenses, marginal weather, etc.) place limits where when specialized studies can be performed; (3) reluctant devote resources establishing maintaining cache instruments dedicated rapid response, preferring instead maximize number permanently field. Thus were significant departure normal mode operations as represented test whether targeted have routine observatory. The results only relate operation mission, but could relevant other observatories research groups, particularly those investigating remote or understudied volcanoes. The …