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Shallow seismic activity and young thrust faults on the Moon

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dc.contributor.author Watters, Thomas R. en
dc.contributor.author Weber, Renee C. en
dc.contributor.author Collins, Geoffrey C. en
dc.contributor.author Howley, Ian J. en
dc.contributor.author Schmerr, Nicholas C. en
dc.contributor.author Johnson, Catherine L. en
dc.date.accessioned 2019-06-14T02:01:47Z
dc.date.available 2019-06-14T02:01:47Z
dc.date.issued 2019
dc.identifier.citation Watters, Thomas R., Weber, Renee C., Collins, Geoffrey C., Howley, Ian J., Schmerr, Nicholas C., and Johnson, Catherine L. 2019. "<a href="https://repository.si.edu/handle/10088/97911">Shallow seismic activity and young thrust faults on the Moon</a>." <em>Nature Geoscience</em>. 12 (6):411&ndash;+. <a href="https://doi.org/10.1038/s41561-019-0362-2">https://doi.org/10.1038/s41561-019-0362-2</a> en
dc.identifier.issn 1752-0894
dc.identifier.uri https://hdl.handle.net/10088/97911
dc.description.abstract 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. en
dc.relation.ispartof Nature Geoscience en
dc.title Shallow seismic activity and young thrust faults on the Moon en
dc.type Journal Article en
dc.identifier.srbnumber 151400
dc.identifier.doi 10.1038/s41561-019-0362-2
rft.jtitle Nature Geoscience
rft.volume 12
rft.issue 6
rft.spage 411
rft.epage +
dc.description.SIUnit NASM en
dc.description.SIUnit NASM-CEPS en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 411
dc.citation.epage +

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