Coordinated Deployment of Seismic Instruments to Record Aftershocks of the September 2010 New Zealand Earthquake

2010年9月4日，新西兰达菲尔德地震是自1931年纳皮尔地震以来新西兰遭受的最严重的地震。虽然没有人员死亡，但该地区的损失非常严重，尤其是附近的克赖斯特彻奇，预计经济损失总额将超过20亿新西兰元。这次地震在科学上也很有趣，而且在许多方面令人惊讶。它发生在一个以前未绘制的断层上，该断层被认为比其他地区（如阿尔卑斯断层）的风险更低。复杂源时间函数表明涉及两个或多个子事件。最令人惊讶的方面之一是这次地震主要沿一条几乎东西向的断层走滑。南岛构造主要由阿尔卑斯断层系统和附近的，主要是东北-西南走向的走滑断层，如希望断层。该项目的数据将提供一个独特的机会来研究一个很可能相当年轻和不成熟的断层，因此在性质上与成熟断层（如加州的圣安德烈亚斯断层或土耳其的安纳托利亚断层）有根本不同。新西兰和威斯康星大学麦迪逊分校的科学家已经部署了临时地震仪器来监测余震。新西兰的仪器由GNS科学和维多利亚大学的工作人员部署，分别由特里·韦伯和玛莎·萨维奇领导。PI周四安排将9台RAMP仪器从IRIS/PASSCAL设施运送到克赖斯特彻奇，并派出2名威斯康星大学麦迪逊分校的工作人员前往新西兰部署它们。此次合作将部署18个短周期、9个宽带和3个强震仪器。RAMP部署将持续到2011年1月中旬。这些数据将在IRIS/ pascal“RAMP”部署所需的时间框架内提供给科学界。该项目将支持一名博士后参与部署，并促进与新西兰科学团队的合作。这项工作是由国际科学与工程办公室和地球物理计划共同支持的。

The September 4, 2010, Darfield, New Zealand earthquake is the most damagingearthquake to strike New Zealand since the 1931 Napier Earthquake. Although no lives werelost, damage was extensive in the area, particularly in nearby Christchurch, and economic lossesare expected to total over NZ $2 billion. The earthquake is also scientifically interesting and inmany ways surprising. It occurred on a previously unmapped fault in an area that was presumedto have lower risks than other areas (e.g., the Alpine Fault). The complex source time functionindicates that two or more subevents were involved.One of the most surprising aspects is thepredominantly strike-slip character of the event along a nearly east-west fault. South Islandtectonics are dominated by the Alpine Fault system and nearby, mostly northeast-southweststriking strike slip faults, such as the Hope Fault. The data from this project will provide aunique opportunity to study a fault that is very likely quite young and immature, and thusfundamentally different in character from mature faults such as the San Andreas Fault inCalifornia or the Anatolian Fault in Turkey.New Zealand and UW-Madison scientists have deployed temporary seismic instrumentsto monitor aftershocks. The New Zealand instruments were deployed by GNS Science andVictoria University staff, led by Terry Webb and Martha Savage, respectively. PI Thurberarranged for the shipment of 9 RAMP instruments from the IRIS/PASSCAL facility toChristchurch and sent 2 UW-Madison staff to New Zealand to deploy them. 18 short-period, 9 broadband, and 3 strong motion instruments will be deployed through this joint endeavor. The RAMP deployment will continue until mid January 2011. The data will be made available to the scientific community within the time frame required for IRIS/PASSCAL "RAMP" deployments.The project will support a postdoctoral student to participate in the deployment, and foster a collaboration with scientific teams in New Zealand. This work is jointly supported by the Office of International Science and Engineering and the Geophysics program.