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).

理论地震学家一直认为，除了翻译和应变外，还应测量旋转。到目前为止，问题是，仪器（尤其是基于机械的传感器）并未为宽带地震学提供所需的分辨率。在先前的研究中，我们可以首次证明基于环激光技术的光传感器能够按照理论预期的那样测量地震诱导的旋转运动。此外，我们可以证明旋转和翻译的录音包含标准三组分地震仪记录中不存在的其他信息。这表明地震学具有新的可观察到的新观察，值得系统地探索。在这个项目中，我们建议（1）处理和模拟新颖的观察结果并绘制在波传播，地震破裂和地震工程问题中应用的潜在领域； （2）开发标准和基础架构，可以通过这些标准和基础设施进行旋转观测，并有效地与其他地震波形数据相一致； （3）进行低分辨率的移动旋转传感器进行测试，并测试其对现场研究的适应性（例如，接近地震来源或火山）。

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