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Regional seismic wave attenuation in...

Ranasinghe, Nishath Rajiv.

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Regional seismic wave attenuation in Northeast China.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Regional seismic wave attenuation in Northeast China./
作者:	Ranasinghe, Nishath Rajiv.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	163 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.
Contained By:	Dissertation Abstracts International78-07B(E).
標題:	Geophysics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10582976
ISBN:	9781369612172

Regional seismic wave attenuation in Northeast China.
Ranasinghe, Nishath Rajiv.

Regional seismic wave attenuation in Northeast China. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 163 p.

Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.

Thesis (Ph.D.)--New Mexico State University, 2016.

The Northeast (NE) China is a geologically complex as well as a geopolitically sensitive region. The region is currently undergoing compression and intraplate continental magmatism. Regional seismic wave attenuation is an important indirect indicator of crustal temperature and rheology.

ISBN: 9781369612172Subjects--Topical Terms:

535228
Geophysics.

Regional seismic wave attenuation in Northeast China.
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100 1 $a Ranasinghe, Nishath Rajiv. $3 3284698
245 1 0 $a Regional seismic wave attenuation in Northeast China.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 163 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.
500 $a Adviser: Thomas Hearn.
502 $a Thesis (Ph.D.)--New Mexico State University, 2016.
520 $a The Northeast (NE) China is a geologically complex as well as a geopolitically sensitive region. The region is currently undergoing compression and intraplate continental magmatism. Regional seismic wave attenuation is an important indirect indicator of crustal temperature and rheology.
520 $a Lg attenuation at 1 Hz was initially studied implementing Reverse Two Station/Event Method (RTM) using data derived from 78 crustal earthquakes that were recorded by NECESSArray. High Lg Q0 values were observed in the Great Xing'an, Lesser Xing'an and Songen-Zhangguangcai Ranges and low Lg Q0 values were observed in Songliao, Sanjiang and Erlian Basins and the lowest Lg Q0 values were observed in Holocene volcanic fields such as Wudalianchi.
520 $a Pg attenuation maps with 3° by 3° resolution were obtained at a central frequency of 1 Hz using TSM and RTSM. The both Pg attenuation map shows high attenuation (Q < 400) throughout NE including Songliao Basin, Erlian Basin, and Sanjiang Basin and also in Holocene volcanic fields such as Wudalianchi Volcanic field.
520 $a Lg attenuation images with 2°x 2° resolution were produced implementing both TSM and RTSM at several narrow bandwidths with central frequencies of 0.5, 1, 2 and 3 Hz. Lg attenuation images produced at low frequencies (≤1 Hz) utilizing both TSM and RTSM, show low Lg Q values in basins and high Lg Q values in the mountain ranges. However, at higher frequencies (≥ 2 Hz) both basins and mountain ranges show high Lg Q values. RTSM consistently show higher Lg Q values than the TSM while both methods show similar frequency dependent factors (n) of 0.49 and 0.46 for TSM and RTSM, respectively.
520 $a Pg site responses were calculated at 1 Hz show amplification in Erlian, Hailar and Songliao Basins and deamplification in Sanjiang Basin, Lesser Xing'an Range and Songen-Zhangguangcai Ranges. Lg site responses calculated at central frequencies of 0.5, 1, 2 and 3 Hz show high degree of lateral variation as well as frequency dependence. At low frequencies (≤ 1 Hz) almost all the seismic stations in the sedimentary basins show amplification and at higher frequencies (≥ 2 Hz) seismic stations in Lesser Xing'an and Songen-Zhangguangcai Ranges show deamplification.
590 $a School code: 0143.
650 4 $a Geophysics. $3 535228
650 4 $a Geology. $3 516570
690 $a 0373
690 $a 0372
710 2 $a New Mexico State University. $3 783784
773 0 $t Dissertation Abstracts International $g 78-07B(E).
790 $a 0143
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10582976