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).

几十年来，理论地震学家一直认为，除了平移和应变之外，旋转也应该被测量。到目前为止的问题是，仪器-特别是机械传感器-不能提供宽带地震学所需的分辨率。在以前的研究中，我们可以证明第一次，基于环形激光技术的光学传感器能够测量地震引起的旋转运动，从理论上预期。此外，我们可以证明，旋转和平移的同位记录包含标准三分量地震仪记录中不存在的额外信息。这表明地震学有了一个值得系统探索的新的可观测性。在这个项目中，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）开发标准和基础设施，使旋转观测可以与其他地震波形数据一起有效地传播和使用;以及（3）用低分辨率的移动的旋转传感器进行测试并测试它们对于现场研究的适用性（例如，靠近地震源或在火山处）。

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