Seismological array experiment in the deep ocean west of Portugal to test the theoretical improvements in deep structure imaging and phase identification

葡萄牙西部深海地震台阵实验检验深部结构成像和相位识别的理论改进

• 批准号: 196033938
• 负责人: Professor Dr. Torsten Dahm
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/196033938?language=en
• 关键词: Seismological; array; experiment; deep; ocean

We plan to conduct a seismological array experiment in the deep ocean west of Portugal to test the improvements in deep structure imaging and phase identification in practice which should be gained by using seismological arrays compared to single 3-component stations or sparse networks. Therefore one OBS array consisting of 12 stations (DEPAS Pool) shall be deployed at about 39° N, 17 ° W . New insights regarding the deep lithosphere structure of the eastern part of the northatlantic oceanic plate will be possible. Seismological arrays enable the use of stacking and frequency-wavenumber filter techniques to enhance the signal to noise ratio and to resolve slowness and azimuth of incoming wavelets additional to traveltime, amplitude and polarization information. The ocean bottom midaperture array (about 50 km aperture) will be situated in the deep ocean north of the Gloria fault (main array). The ocean bottom array will be complemented by two mid-aperture landarrays consisting of 12 stations each. The first landarray will be located in Portugal to the East of the ocean bottom array, the second is planned on the island of Madeira.

我们计划在葡萄牙西部的深海进行地震阵列实验，以测试在实践中，应通过使用地震阵列相比，单一的3分量站或稀疏网络的深层结构成像和相位识别的改进。因此，应在39° N，17 ° W左右部署一个由12个站（DEPAS池）组成的OBS阵列。关于北大西洋板块东部岩石圈深部结构的新见解将是可能的。地震台阵能够利用叠加和频率-波数滤波技术来提高信噪比，并在传播时间、振幅和极化信息之外，解决入射子波的慢度和方位角问题。海底中孔径阵列（孔径约50公里）将位于格洛丽亚断层（主阵列）以北的深海。海底阵列将由两个中孔径陆地阵列补充，每个阵列由12个台站组成。第一个陆地阵列将位于葡萄牙东部的海底阵列，第二个计划在马德拉岛上。

项目成果

Measuring of clock drift rates and static time offsets of ocean bottom stations by means of ambient noise

• DOI: 10.1093/gji/ggt434
• 发表时间: 2014-02-01
• 期刊: GEOPHYSICAL JOURNAL INTERNATIONAL
• 影响因子: 2.8
• 作者: Hannemann, Katrin;Krueger, Frank;Dahm, Torsten
• 通讯作者: Dahm, Torsten

Oceanic lithospheric S-wave velocities from the analysis of P-wave polarization at the ocean floor

• DOI: 10.1093/gji/ggw342
• 发表时间: 2016-12
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: K. Hannemann;F. Krüger;T. Dahm;D. Lange