SGER Collaborative Research: Seismic and Geodetic Deployment in Anticipation of a Predicted Slow Earthquake at Kilauea Volcano

该SGER资助了一项地震和大地测量实验，以捕捉预计将于2007年3月17日在基拉韦厄火山两侧发生的预期慢地震（SE）的特征。该实验将暂时加密基拉韦厄的地震和大地测量网络，以澄清东南变形与下一次基拉韦厄东南期间触发的地震活动之间的关系。在过去的十年中，基拉韦厄火山的南翼已经成为至少7个缓慢（或“沉默”）地震（SE）的连续GPS（CGPS）数据确定的网站。SE可分为“西部”和“东部”系列，由相似的水平运动模式定义，其中，西部系列是周期性的，间隔为774 +/-7天（布鲁克斯等人，2006年）。周期性的SE在同一地点触发了不同的微震群。目前，对于微地震是发生在区域滑脱层上还是潜在地发生在较浅的构造层次上存在一些分歧。解决这一矛盾是很重要的，因为微震活动的位置可以用来帮助我们限制定位，并进一步加深我们对SE本身的机械理解。引起缓慢滑动和相关震颤的物理过程是地震科学家社区正在进行的深入研究的主题。对理论解释的观察和探索激发了一些具有挑战性和潜在重要性的假设。这项工作将增加有助于区分各种机制的重要数据。

This SGER funds a seismic and geodetic experiment to capture thecharacteristics of an anticipated slow earthquake (SE) predicted to occur on the flanks ofKilauea volcano on March 17, 2007. The experiment would temporarily densify the seismic and geodetic networks at Kilauea in order to clarify the relationship between SE deformation and triggered seismicity during the next Kilauea SE. In the past decade, Kilaueavolcano's south flank has been the site of at least 7 slow (or 'silent') earthquakes (SEs)identified with continuous GPS (CGPS) data. The SEs can be divided into 'Western' and 'Eastern' families defined by similarpatterns of horizontal motions and, of these, theWestern family are periodic and separated by 774 +/-7 day periods (Brooks et al., 2006). Adistinct swarm of micoearthquakes is triggered in the same place by the periodic SEs. There is currently some disagreement about whethermicroearthquakes occur on the regional decollement orpotentially at shallower structural levels. Resolving the discrepancy isimportant because the location of the microseismicity could be used to help constrain thelocation and further our mechanistic understanding of the SEs themselves.The physical processes giving rise to the slow slip and associated tremor are the subject ofintensive ongoing research by the community of earthquake scientists. The observations andsearch for theoretical explanations have stimulated some provocative and potentiallyimportant hypotheses. This work would add vital data that may help to distinguish between mechanisms.