Continued Drift-Free Seafloor Pressure Observations at Axial Seamount - Capturing the Vertical Deformation Time Series of a Magmatic System

轴向火山是一座活跃的海底火山，位于俄勒冈州海岸以西约470公里（300英里）处。 海洋观测倡议有线阵列已经安装了一些仪器来监测火山。本工作的重点是控制压力计漂移的仪器。通过这样做，该仪器可以监测火山的垂直运动。反过来，这将有助于更好地了解这座水下火山爆发的可能性，从而深入了解潜在的自然灾害。 电缆自校准压力记录仪（SCPR）包含液压校准系统（自重测试仪），以估计和消除传感器漂移。 该仪器是在以前资助的NSF项目中开发和部署的。SCPR于2018年7月安装。 该项目将测量延长到2024年，以潜在地捕捉通货膨胀，喷发，沉降和重复通货膨胀的周期。继续部署具有科学价值，并有效利用公共投资和资源。继续部署将有助于补充和独立的调查，如轴火山的重复压力调查，共置底部压力计的漂移控制，以及压力计不同漂移控制方法的测试。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Axial Volcano is an active seafloor volcano located approximately 470 km (300 miles) west of the Oregon coast. The Ocean Observatory Initiative Cabled Array has installed a number of instruments to monitor the volcano. The instrument that is the focus of this work controls the drift of pressure gauges. By doing so, the instrument can monitor the vertical movement of the volcano. In turn this will contribute to a better understanding of the potential of an eruption at this underwater volcano and thus, insight into potential natural hazards. The Cabled Self-Calibrating Pressure Recorder (SCPR) incorporates a hydraulic calibration system (deadweight tester), in order to estimate and remove sensor drift. This instrument was developed and deployed in previously funded NSF projects. The SCPR was installed in July 2018. This project extends the measurements until 2024 to potentially capture a cycle of inflation, eruption, subsidence, and repeated inflation. Continued deployment is scientifically valuable and uses public investments and resources efficiently. The continued deployment will serve complementary and independent investigations, such as repeated pressure surveys of Axial volcano, drift control of a co-located bottom pressure gauge, and a test of a different drift control method for pressure gauges.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.