Space Geodetic Investigation of the Northridge Earthquake

小行星9416338 该项目将调查1994年1月17日北岭地震前后永久全球定位系统（GPS）大地测量阵列位置的时间序列，重点是地震前几个月在喷气推进实验室和Ranchos Palos Verdes站点检测到的异常应变事件。 将通过数据叠加程序分析这些信号，以确定它们是否是异常应变变化的真实的指标或初始分析的伪影。 如果是真实的，这些信号可能是地震前的指标，这将通过与其他现有数据和地震模型的比较来检验。 此外，还将开发更好的技术，以便对圣费尔南多谷和洛杉矶盆地的全球定位系统测量数据进行加密和快速响应。 这项研究的结果将有重大意义的地震灾害减轻使用空间大地测量技术在盲目的推力环境，如圣费尔南多谷和洛杉矶盆地。

9416338 Bock This project will investigate the time series of positions from the Permanent Global Positioning System (GPS) Geodetic Array prior to and after the Northridge earthquake of January 17, 1994 focussing on the anomalous strain events detected at the Jet Propulsion Laboratory and Ranchos Palos Verdes sites several months before the earthquake. The signals will be analyzed by data stacking procedures to see if they are real indicators of anomalous strain variations or artifacts of the initial analysis. If real, these signals may be preseismic indicators and this will be tested by comparison with other available data and earthquake models. In addition, improved techniques will be developed for densification and rapid response of GPS measurements in the San Fernando Valley and Los Angeles Basin. The results of this study will have major implications for earthquake hazards mitigation using space geodetic techniques in blind thrust environments such as the San Fernando Valley and Los Angeles Basin.