Earthquake induced rotational ground motions

地震引起的旋转地面运动

• 批准号: 28526099
• 负责人: Professor Dr. Heiner Igel
• 金额: --
• 依托单位: Sektion Geophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/28526099?language=en
• 关键词: Earthquake; induced; rotational; ground; motions

Theoretical seismologists have argued for decades that - in addition to translations and strains - rotations should also be measured. The problem so far had been that instruments - particularly mechanically based sensors - did not provide the required resolution for broadband seismology. In a previous study we could demonstrate for the first time that optical sensors based on ring laser technology are capable of measuring seismically induced rotational motions as expected from theory. In addition, we could show that collocated recordings of rotations and translations contain additional information not present in standard three-component seismometer recordings. This suggests that seismology has a new observable that is worth exploring systematically. In this project we propose (1) to process and model the novel observations and map out potential fields of applications in wave propagation, earthquake rupture, and earthquake engineering problems; (2) to develop standards and infrastructure with which rotational observations can be disseminated and used efficiently in line with other seismological waveform data; and (3) to carry out tests with low -resolution mobile rotation sensors and test their fitness for field studies (e.g., close to seismic sources or at volcanoes).

理论地震学家几十年来一直认为，除了平移和应变之外，还应该测量旋转。迄今为止的问题是，仪器——特别是基于机械的传感器——不能提供宽带地震学所需的分辨率。在之前的一项研究中，我们首次证明了基于环形激光技术的光学传感器能够像理论上预期的那样测量地震引起的旋转运动。此外，我们可以证明旋转和平移的并置记录包含标准三分量地震仪记录中不存在的额外信息。这表明地震学有一个值得系统探索的新现象。在本项目中，我们建议(1)处理和模拟新的观测结果，并绘制出波传播、地震破裂和地震工程问题的潜在应用领域；(2)制定标准和基础设施，使旋转观测资料能够与其他地震波形资料相结合，有效地传播和利用；(3)使用低分辨率移动旋转传感器进行测试，并测试其是否适合实地研究（例如，靠近震源或火山）。

项目成果

Strain rotation coupling and its implications on the measurement of rotational ground motions

应变旋转耦合及其对旋转地面运动测量的影响

• DOI: 10.1007/s10950-012-9296-5
• 发表时间: 2012
• 期刊: Journal of Seismology
• 影响因子: 1.6
• 作者: van Driel;J. Wassermann;M. F. Nader;B. S. A. Schuberth;H. Igel
• 通讯作者: H. Igel

Examining ambient noise using colocated measurements of rotational and translational motion

• DOI: 10.1007/s10950-012-9288-5
• 发表时间: 2012-10-01
• 期刊: JOURNAL OF SEISMOLOGY
• 影响因子: 1.6
• 作者: Hadziioannou, Celine;Gaebler, Peter;Igel, Heiner
• 通讯作者: Igel, Heiner