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dc.contributor.authorRanasinghe, Nishath R.
Gallegos, Andrea C.
Trujillo, Andrea R.
Blanchette, Alexander R.
Sandvol, Eric A.
Ni, James
Hearn, Thomas M.
Tang, Youcai
Grand, Stephen P.
Niu, Fenglin
Chen, Yongshun J.
Ning, Jieyuan
Kawakatsu, Hitoshi
Tanaka, Satoru
Obayashi, Masayuki
dc.date.accessioned 2015-01-08T14:55:03Z
dc.date.available 2015-01-08T14:55:03Z
dc.date.issued 2015
dc.identifier.citation Ranasinghe, Nishath R., Gallegos, Andrea C., Trujillo, Andrea R., et al.. "Lg attenuation in northeast China using NECESSArray data." Geophysical Journal International, 2, no. 1 (2015) Oxford University Press on behalf of The Royal Astronomical Society: 67-76. http://dx.doi.org/10.1093/gji/ggu375.
dc.identifier.urihttps://hdl.handle.net/1911/78905
dc.description.abstract The 127 station NorthEast China Extended SeiSmic Array (NECESSArray) provides large quantities of high quality seismic data in northeast China that allow us to resolve lateral variations of Lg Q or crustal attenuation at 1 Hz (Qo) to 2.0° or greater. Using the reverse two-station/event method with 11 642 Lg path-amplitudes from 78 crustal earthquakes, we obtain a 2-D tomographic image of Lg Qo with values ranging from ∼50 to 1400. A high degree of detail in the lateral variation of Lg attenuation is revealed in our tomographic image. High Qo regions are found in the Great Xing'an, Lesser Xing'an and Songen-Zhangguangcai Ranges. Low Qo regions are observed in the Songliao, Sanjiang and Erlian Basins. The lowest Qo is found near the Wudalianchi volcanic field and other Quaternary volcanic fields, the southern Songliao Basin, the western edge of the Erlian Basin and the Sanjiang Basin. Low Qo values are measured for paths that cross sedimentary basins with thick, unconsolidated sediments. Most of the high Lg attenuation in the Songliao Basin correlates reasonably well with low crustal Rayleigh wave phase velocity anomalies. The highest attenuating regions also correlate well with regions of Holocene volcanism..
dc.language.iso eng
dc.publisher Oxford University Press on behalf of The Royal Astronomical Society
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Lg attenuation in northeast China using NECESSArray data
dc.type Journal article
dc.citation.journalTitle Geophysical Journal International
dc.subject.keywordtomography
heat flow
earthquake ground motions
seismicity and tectonics
guided waves
seismic attenuation
seismic tomography
dc.citation.volumeNumber 2
dc.citation.issueNumber 1
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1093/gji/ggu375
dc.type.publication publisher version
dc.citation.firstpage 67
dc.citation.lastpage 76


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