This paper describes the methods used to estimate positions, velocities, breaks, and seasonal terms from daily Global Navigation Satellite System (GNSS) measurements. Break detection and outlier removal have been automated so that decades of daily measurements from thousands of stations can be processed in a few hours. New measurements are added, and parameters are updated every week. Model parameters allow separation of interseismic, annual, coseismic, and postseismic signals. Tools available through GeoGateway (http://geo-gateway.org) allow rapid visualization and analysis of these terms for results that can be subsetted in time or space. Results show highly variable and nonlinear motion for GPS stations in southern California. The variable motion is related to seasonal motions, distributed tectonic motion, earthquakes, and postseismic motions that can continue for years. In some areas results suggest that additional processes are responsible for the observed motions. In general, following earthquakes, stations return to their long‐term motions after 2–3 years, though some exceptions occur. The use of the tools shows nonlinear motion in the Salton Trough of southern California related to the 2010 M7.2 El Mayor‐Cucapah earthquake, 2012 Brawley earthquake swarm, and a creep event on the Superstition Hills fault in 2017.

中文翻译：

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自动估计和工具，可从每日GNSS测量中提取位置，速度，间隔和季节性条件：照亮非线性Salton槽形变形

本文介绍了用于通过每日全球导航卫星系统（GNSS）测量来估计位置，速度，中断和季节性条件的方法。中断检测和异常值清除已实现自动化，因此数小时内可处理数千个站点的数十年日常测量结果。添加新的测量值，并每周更新参数。模型参数可以区分地震，年震，同震和后震信号。通过GeoGateway（http://geo-gateway.org）可用的工具可以对这些术语进行快速可视化和分析，以获得可以在时间或空间上细分的结果。结果表明，南加州GPS站的运动高度可变且呈非线性。可变运动与季节性运动，分布式构造运动，地震，以及可能持续数年的地震后运动。在某些领域，结果表明观察到的运动可能与其他过程有关。通常，地震后，台站会在2-3年后恢复其长期运动，尽管会发生一些例外。工具的使用显示了与2010年M7.2 El Mayor-Cucapah地震，2012年Brawley地震群以及2017年Superstition Hills断层发生的蠕变有关的南加州Salton槽中的非线性运动。