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

这个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日在基拉韦厄火山侧翼发生的一次预期的慢地震(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，以澄清东南形变与下一次基拉韦厄东南部期间触发的地震活动之间的关系。在过去的十年里，基拉沃卡诺的南侧至少发生了7次缓慢(或无声)的地震，这是由连续的全球定位系统(CGPS)数据确定的。SES可分为由相似的水平运动模式定义的“西方”和“东方”家族，其中西方家族是周期性的，相隔774+/-7天周期(Brooks等人，2006年)。周期性的地震活动在同一地点触发了明显的微震群。目前，关于微震是发生在区域滑脱还是可能发生在较浅的构造水平上，存在一些分歧。解决这种差异很重要，因为微震活动的位置可以用来帮助限制位置，并进一步加深我们对地震本身的机械理解。引起缓慢滑动和相关震动的物理过程是地震科学家团体正在进行的密切研究的主题。对理论解释的观察和探索激发了一些具有挑衅性和潜在重要性的假说。这项工作将增加重要数据，有助于区分不同的机制。

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.