Seasonal variations in the Rayleigh-to-Love wave ratio in the secondary microseism from colocated ring laser and seismograph

被引：17

作者：

Tanimoto, Toshiro ^{[1
,2
]}

Hadziioannou, Celine ^{[3
]}

Igel, Heiner ^{[3
]}

Wassermann, Joachim ^{[3
]}

Schreiber, Ulrich ^{[4
]}

Gebauer, Andre ^{[4
]}

Chow, Bryant ^{[3
]}

机构：

[1] Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA

[3] Univ Munich, Dept Earth & Environm Sci, Munich, Germany

[4] Tech Univ Muenchen, Forsch Einrichtung Satellitengeodaesie, Koetzting, Germany

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH | 2016年 / 121卷 / 04期

关键词：

THERMOELASTIC STRAIN; OSCILLATIONS; EXCITATION;

D O I：

10.1002/2016JB012885

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Monthly variations in the ratio of Rayleigh-to-Love waves in the secondary microseism are obtained from a colocated ring laser and an STS-2 seismograph at Wettzell, Germany. Two main conclusions are derived for the Rayleigh-to-Love wave kinetic energy ratios in the secondary microseism; first, the energy ratio is in the range 0.8-0.9 ( 1.0) throughout a year except for June and July. It means that Love wave energy is larger than Rayleigh wave energy most of the year by about 10-20%. Second, this ratio suddenly increases to 1.0-1.2 in June and July, indicating a larger fraction of Rayleigh wave energy. This change suggests that the locations and behaviors of excitation sources are different in these months.

引用

页码：2447 / 2459

页数：13

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