Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1126/science.aau7649 |
Shear properties of Earth's inner core constrained by a detection of J waves in global correlation wavefield | |
Tkalcic, Hrvoje; Thanh-Son Pham | |
2018-10-19 | |
发表期刊 | SCIENCE
![]() |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2018 |
卷号 | 362期号:6412页码:329-332 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Seismic J waves, shear waves that traverse Earth's inner core, provide direct constraints on the inner core's solidity and shear properties. However, these waves have been elusive in the direct seismic wavefield because of their small amplitudes. We devised a new method to detect J waves in the earthquake coda correlation wavefield. They manifest through the similarity with other compressional core-sensitive signals. The inner core is solid, but relatively soft, with shear-wave speeds and shear moduli of 3.42 +/- 0.02 kilometers per second and 149.0 +/- 1.6 gigapascals (GPa) near the inner core boundary and 3.58 +/- 0.02 kilometers per second and 167.4 +/- 1.6 GPa in Earth's center. The values are 2.5% lower than the widely used Preliminary Earth Reference Model. This provides new constraints on the dynamical interpretation of Earth's inner core. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447680100045 |
WOS关键词 | PKJKP ; VISCOSITY ; CODA ; ATTENUATION ; MECHANISM ; PERIODS ; MODEL ; IRON |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/199866 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia |
推荐引用方式 GB/T 7714 | Tkalcic, Hrvoje,Thanh-Son Pham. Shear properties of Earth's inner core constrained by a detection of J waves in global correlation wavefield[J]. SCIENCE,2018,362(6412):329-332. |
APA | Tkalcic, Hrvoje,&Thanh-Son Pham.(2018).Shear properties of Earth's inner core constrained by a detection of J waves in global correlation wavefield.SCIENCE,362(6412),329-332. |
MLA | Tkalcic, Hrvoje,et al."Shear properties of Earth's inner core constrained by a detection of J waves in global correlation wavefield".SCIENCE 362.6412(2018):329-332. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论