气候变化领域集成服务门户(CCPortal): Shallow seismic activity and young thrust faults on the Moon

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DOI	10.1038/s41561-019-0362-2
	Shallow seismic activity and young thrust faults on the Moon
	Watters T.R.; Weber R.C.; Collins G.C.; Howley I.J.; Schmerr N.C.; Johnson C.L.
发表日期	2019
ISSN	17520894
卷号	12 期号:6
英文摘要	The discovery of young thrust faults on the Moon is evidence of recent tectonic activity, but how recent is unknown. Seismometers at four Apollo landing sites recorded 28 shallow moonquakes between 1969 and 1977. Some of these shallow quakes could be associated with activity on the young faults. However, the epicentre locations of these quakes are poorly constrained. Here we present more-accurate estimates of the epicentre locations, based on an algorithm for sparse seismic networks. We found that the epicentres of eight near-surface quakes fall within 30 km of a fault scarp, the distance of the expected strong ground shaking. From an analysis of the timing of these eight events, we found that six occurred when the Moon was less than 15,000 km from the apogee distance. Analytical modelling of tidal forces that contribute to the current lunar stress state indicates that seven near-apogee events within 60 km of a fault scarp occur at or near the time of peak compressional stresses, when fault slip events are most likely. We conclude that the proximity of moonquakes to the young thrust faults together with evidence of regolith disturbance and boulder movements on and near the fault scarps strongly suggest the Moon is tectonically active. © 2019, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
语种	英语
scopus关键词	boulder; compression; earthquake epicenter; Moon; seismicity; seismograph; shaking table test; slip; tectonics; thrust fault
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124655
作者单位	Center for Earth and Planetary Studies, Smithsonian Institution, Washington, DC, United States; NASA Marshall Space Flight Center, Huntsville, AL, United States; Physics and Astronomy Department, Wheaton College, Norton, MA, United States; University of Maryland, Department of Geology, College Park, MD, United States; Dept. of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada; Planetary Science Institute, Tucson, AZ, United States
推荐引用方式 GB/T 7714	Watters T.R.,Weber R.C.,Collins G.C.,et al. Shallow seismic activity and young thrust faults on the Moon[J],2019,12(6).
APA	Watters T.R.,Weber R.C.,Collins G.C.,Howley I.J.,Schmerr N.C.,&Johnson C.L..(2019).Shallow seismic activity and young thrust faults on the Moon.Nature Geoscience,12(6).
MLA	Watters T.R.,et al."Shallow seismic activity and young thrust faults on the Moon".Nature Geoscience 12.6(2019).