Equipment Support: Mechanisms of Postseismic Deformation following the 2002 Denali Fault Earthquake

0323156 Freymueller尽管地震周期中震后变形过程的重要性现在已被接受，但关于什么机制是瞬态变形的原因、变形发生的位置以及候选过程的相关本构参数是什么仍存在许多争论。2002年11月3日发生在阿拉斯加州德纳里的Mw 7.9级地震为收集地表变形测量提供了机会，这些测量有助于我们对地球岩石圈主要变形机制以及断层带和周围地壳及上地幔流变参数的认识有显著提高。德纳里地震的大力矩，精确的震前变形场，和即时的现场响应，使其成为最有前途的目标，以解决震后变形问题，因为现代空间大地测量方法成为可用。这笔赠款支持升级，扩大，并继续运行和维护现有的地震后GPS网络接近2002年11月3日Denali Alaska地震的Mw7.9震中超过三年。 主震发生后两周内，联合国志愿人员组织的工程师在国家科学基金会的支持下，在断层附近安装了10个连续的全球定位系统（CGPS）站点。 这些站点构成了计划中的16个站点网络的核心。前10个站点安装迅速，没有发电或遥测，以便在极端的冬季条件使工作无法进行之前将站点安装到位。这笔资金将用于升级这些现有的站点，提供坚固的外壳和太阳能+风能。 还将建立另外6个新的CGPS站点，作为地震后全球定位系统响应网络的一部分。 一笔相关的地球物理学赠款将用于支持数据的地球动力学建模（GPS-0310410），所有全球定位系统数据将通过联合国志愿人员组织全球定位系统数据档案提供给更广泛的科学界。

0323156FreymuellerDespite the now accepted importance of post-seismic deformation processes during the earthquake cycle, much debate persists about what mechanisms are responsible for the transient deformation, where the deformation occurs, and what the relevant constitutive parameters of the candidate processes are. The occurrence of the Mw 7.9 November 3, 2002 Denali Alaska earthquake has created the opportunity to collect the surface deformation measurements needed to make significant improvements in our knowledge of the dominant deformation mechanisms in the Earth's lithosphere and the rheological parameters of the fault zone and surrounding crust and upper mantle. The large moment of the Denali earthquake, the precise pre-earthquake deformation field, and the immediate field response make this the most promising target to address post-seismic deformation problems since modern space-geodetic methods became available. This grant supports the upgrade, expansion, and continued operation and maintenance of an existing post-seismic GPS network proximal to the epicenter of the Mw 7.9 November 3, 2002 Denali Alaska Earthquake over a three-year period. Within two weeks of the mainshock, UNAVCO engineers, with NSF support, installed 10 continuous GPS (CGPS) sites near the fault. These sites form the core of a planned 16-station network. The first 10 sites were installed quickly and without power generation or telemetry, in order to get the sites in before extreme winter conditions made work impossible. This funding will allow for upgrade of these existing sites with robust enclosures and solar plus wind power. An additional 6 new CGPS sites will also be established as part of the post-seismic GPS response network. A related Geophysics grant will support geodynamic modeling of the data (EAR-0310410) and all GPS data will be available to the broader scientific community through the UNAVCO GPS data archive.***