Deep Well Seismology at Parkfield, CA: Sensor Array and Microearthquake Wave VSP (Instrumentation)

瓦里安A-1井位于加利福尼亚州帕克菲尔德西北几公里处，深度约1.5公里，为分析圣安德烈亚斯断裂带附近的地震信号提供了机会，该断裂带位于预测大地震的位置。美国地质调查局已承诺提供资金打开油井，以便安装地震仪阵列，用于地震垂直剖面分析。该项目将导致设计、制造、采购和组装将安装在瓦里安A-1井的地震传感器系统。深井除了靠近大地震的成核区外，由于不受地表和近地表地震噪声的影响，是进行敏感测量的绝佳观测点。该项目将有助于更好地了解地震孕育机制和提高地震预报能力。

The Varian A-1 well, drilled to approximately 1.5 km depth a few kilometers northwest of Parkfield, California, presents an opportunity for analysis of seismic signals close to the San Andreas fault zone at a location where a large earthquake is predicted. The U.S. Geological Survey has committed funds to open the well so that a seismometer array can be installed for seismic vertical profiling. This project will result in the design, fabrication, purchase, and assembly of a seismic sensor system to be installed in the Varian A-1 well. In addition to its location close to the nucleation zone of major earthquakes, the deep well is an excellent observatory site for sensitive measurements because it is not subject to surface and near-surface seismic noises. This project will contribute to a better understanding of earthquake-generating mechanisms and to improved earthquake prediction capabilities.