Collaborative Research: Analysis of Seismicity Associated with the Mw=8.8 2010 Maule Earthquake and Implications for Subduction Processes

合作研究：2010 年马乌莱地震 Mw=8.8 相关地震活动分析及其对俯冲过程的影响

• 批准号: 1045633
• 负责人: Steven Roecker
• 金额: $ 8.15万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-02-15 至 2014-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1045633&HistoricalAwards=false
• 关键词: Collaborative; Research; Analysis; Seismicity; Associated

The Mw=8.8 Maule earthquake off the coast of Chile onFebruary 27, 2010 is the 5th largest megathrust earthquake ever to be recorded and the 2ndlargest to be recorded by modern digital seismic networks. Immediately following theMaule earthquake, teams of seismologists from Germany, France, the UK, and the US,working with seismologists in Chile, coordinated resources to deploy both broadband andshort period seismometers and accelerometers above the rupture zone to captureaftershocks associated with this significant earthquake. Data recorded from these stationswill be combined to produce an open international community data volume providing anunprecedented opportunity to investigate processes associated with great earthquakes andto image the anatomy of a subduction zone. A defining characteristic of the Maule aftershock investigationshas been collaboration, at both national and international levels. The original involvementin the data collection by US teams grew voluntarily out of the IRIS community, and therationale of greater efficiencies through cooperation was readily adapted by the fiveinternational groups working in the region.In this project the researchers will carry out a broad butinterrelated spectrum of seismic analyses to the Maule international seismic data set,along with a reanalysis of a selection of data collected in the rupture zone prior to theearthquake, to address some of the fundamental scientific objectives that motivated theinitial data collection. These objectives fall into two general categories: (1) ruptureprocesses of megathrusts, and (2) active tectonics and dynamics of an oceanic-continental(Andean) margin. They intend to produce an internally consistent set of data products across a range ofanalytical techniques. The PIs will share graduate students and scheduling extended visits to each others labs, thereby exposing students to a significantly broader range of experience than most students typically enjoy. Finally, they plan to engage our international colleagues by sharing some analysis tasks of mutualinterest. Data products generated by this study will be made available to the broaderinternational community via a dedicated web site.

MW = 8.8 Maule地震在2010年2月27日智利沿海地区是有史以来第五大巨像地震，也是现代数字地震网络记录的第二大地震。与智利的地震学家一起，与地震学家的团队紧随其后，与智利的地震学家合作，协调了资源，以在破裂区域上方部署宽带和肖特时期的地震仪和加速度计，以捕获与这一重大地震相关的捕获量。从这些站点记录的数据将结合起来，以产生开放的国际社会数据量，提供了不明显的机会，可以调查与大地震相关的过程，并为俯冲带的解剖结构形象化。国家和国际级别的Maule余震调查的定义特征是合作。在美国团队收集的数据收集中的最初参与是自愿从IRIS社区中发展出来的，并且在该地区工作的五境群体很容易通过合作提高效率。在该项目中，研究人员将在此项目中进行广泛的范围，但与Maule International Collectiul of Maule Seists Colulpult of Maule Seists Colultuers一起进行，并与Maules Collectiul consecult of a Maule Seists Colultuers一起进行了选择。 theearthquake，以解决动机数据收集的一些基本科学目标。这些目标分为两个一般类别：（1）大型巨像的破裂程序，以及（2）海洋 - 联合（Andean）边缘的主动构造和动力学。他们打算在一系列分析技术中生产一组内部一致的数据产品。 PI将分享研究生，并安排互相访问，从而使学生获得比大多数学生通常享受的更广泛的经验。最后，他们计划通过分享一些互动分析任务来吸引我们的国际同事。这项研究生成的数据产品将通过专门的网站向更广泛的社区提供。