Rapid deployment seismic array

快速部署地震台阵

• 批准号: NE/X005879/1
• 负责人: Stewart Fishwick
• 金额: $ 95.45万
• 依托单位: University of Leicester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FX005879%2F1
• 关键词: Rapid; deployment; seismic; array

Seismic methods underpin many areas of NERC research; as one of a limited number of methods for "imaging" the Earth in near real time, and one of the most used methods for obtaining information about the physical properties of the subsurface. Seismic methods are used across earth and environmental sciences: for the monitoring and characterisation of earthquakes, volcanoes and landslides; for understanding impacts from human infrastructure including geothermal power and wind turbines; for the study of glacial movement, freeze-thaw processes, and permafrost behaviour; for imaging the deep Earth, including subsurface natural resources; and for animal behaviour, such as migration. There is a growing need for rapid seismic deployments in remote, inaccessible and challenging environments, such as glacial ablation zones, where existing seismic sensors would fail. Providing access for the UK research community to such a rapid deployment seismic array is the top priority defined by the NERC Geophysical Equipment Facility (GEF) steering committee in 2021, and in the NERC Statement of Community Need it was stated that "there is an urgent requirement to replace GEF's critical backbone instrumentation with modern and forward-looking alternatives in the short term".An array of Certimus sensors, as proposed here, would fulfil this urgent requirement by providing both critical backbone instrumentation, and bringing unique, next generation benefits, such as tilt tolerance, which has increased to plus / minus 90 degrees, from just plus / minus 2.5 degrees in older instruments. This feature is unique to the Certimus and creates a step change in world class environmental science by enabling continuous broadband seismic data acquisition in environments where other broadband seismometers would fail due to rapidly changing ground levels, such as glaciers, continental ice sheets and permafrost in the cryosphere; and areas of slope instability such as landslides and avalanches. The Certimus uses approximately 1/3 of the power of its predecessor, which significantly reduces the number of solar panels and batteries which much be transported into the field. Additionally, smaller and lighter instruments reduce the shipping weight, which further reduces the environmental cost of data acquisition. The array would become part of the NERC Geophysical Equipment Facility, being housed within the Leicester node (SEIS-UK) from the outset, where GEF staff would commission, support and maintain it for its entire lifespan. It would be available to UK researchers with full GEF support and training through the normal Facility application process. Demand for this class of sensor has been consistently high throughout GEF's history, often exceeding supply, and this has become an acute problem since the retirement of the older equipment.GEF have over 20 years' experience and expertise in maintaining seismic equipment, and combined with their user training and support programs, they have demonstrated ability to keep sensors in use for over double the manufacturers' expected lifespan. Data will be archived and publically available 3 years after each loan ends, bringing additional value to this capital investment. Our project partner has significant experience of working with the Certimus and state that they "... strongly believe that this equipment will have a transformational effect on the research undertaken by the seismology community in the UK, largely because it opens up areas of research that were not previously possible, yet sit squarely within NERC's remit". Our project partner, who has offered in-kind support to field test equipment, and train GEF staff, also believes that "access to a sizable pool of Certimus seismometers will allow the UK seismology community to stay at the forefront of its discipline for the next decade, and provide new impetus to engage in multidisciplinary research like never before".

地震方法是NERC研究的许多领域；作为几乎实时“成像”地球的数量有限的方法之一，也是获得有关地下物理特性的最常用方法之一。地震方法遍布地球和环境科学：用于监测和表征地震，火山和滑坡；为了理解人类基础设施的影响，包括地热力和风力涡轮机；为了研究冰川运动，冻融过程和多年冻土行为；用于成像深地球，包括地下自然资源；以及动物行为，例如迁移。在远程，无法访问和具有挑战性的环境（例如冰川消融区）中，需要快速的地震部署，现有的地震传感器将失败。为英国研究社区提供这种快速部署地震阵列是NERC地球物理设备设施（GEF）指导委员会所定义的首要任务，并在NERC的社区声明中需要指出：“迫切需要在此迫切需要将GEF临时替换为现代和前瞻性的替代方案。通过提供关键的骨干仪器，并带来独特的下一代优势，例如倾斜公差，从旧仪器中的正当加上2.5度增加到加上 /减90度。此功能是certimus独有的，并通过在其他宽带地震仪中启用连续的宽带地震数据获取，从而在世界一流的环境科学中创造了一步变化，因为其他宽带地震仪会因迅速变化的地面水平而失败，例如冰川，大陆冰盖和在红圈中的永久冻土；以及斜坡不稳定的区域，例如滑坡和雪崩。 Certimus使用了其前任大约1/3的功率，这大大减少了太阳能电池板和电池的数量，这些太阳能电池板和电池的数量很大程度上被运输到该领域。此外，较小和较轻的仪器减轻了运输重量，从而进一步降低了数据获取的环境成本。该阵列将从一开始就被安置在莱斯特节点（SEIS-UK）内的NERC地球物理设备设备的一部分，GEF员工将在整个生命周期内进行委托，支持和维护它。通过普通设施申请流程，可以向英国研究人员提供全部GEF支持和培训的研究人员。对这类传感器的需求在整个GEF的历史上一直很高，通常超过供应，这已成为一个急剧问题，因为旧设备退休。GEF拥有20多年的经验和在维持地震设备的经验和专业知识，并结合其用户培训和支持计划，它们可以证明能够在制造商的预期使用寿命中保持传感器的能力。数据将在每笔贷款结束后3年进行存档并公开可用，从而为这项资本投资带来额外的价值。我们的项目合作伙伴在与Certimus合作并指出他们“……坚信该设备将对英国的地震学界进行的研究产生变革影响，这主要是因为它打开了以前不可能的研究领域，但在NERC的汇款中坐下来，这将具有变革性的影响”。我们的项目合作伙伴为现场测试设备提供了实物支持，并培训GEF员工，他还认为“获得相当大的Certimus地震仪将使英国的地震学社区能够在接下来的十年中保持其纪律的最前沿，并为您提供新的攻击，从而从未像以前一样从事多学科研究。