Source process and tectonic implications of the 8 January 2006 (M-w 6.7) Kythira earthquake, southern Greece

NCU Institutional Repository > 地球科學學院 > 地球物理研究所 > 期刊論文 > Item 987654321/27561

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27561

題名:	Source process and tectonic implications of the 8 January 2006 (M-w 6.7) Kythira earthquake, southern Greece
作者:	Konstantinou,KI;Lee,SJ;Evangelidis,CP;Melis,NS
貢獻者:	地球物理研究所
關鍵詞:	HELLENIC SUBDUCTION ZONE;1999 CHI-CHI;TELESEISMIC DATA;TRAVEL-TIMES;CALIFORNIA;DEPTH;INVERSION;SEISMICITY;LOCATIONS;SEQUENCE
日期:	2009
上傳時間:	2010-06-29 18:40:57 (UTC+8)
出版者:	中央大學
摘要:	On 8 January 2006 at 11:34 (GMT) a strong (M-w 6.7) subcrustal earthquake occurred near Kythira island in southern Greece, causing damage to the surrounding area while the shock was also felt in most of the eastern Mediterranean. The event and its aftershocks were recorded by a regional network of 31 stations equipped with three-component broad-band seismometers that cover most parts of the Greek region. Initial locations of the earthquake sequence showed a diffuse pattern, therefore catalog and cross-correlation differential travel times were input to a shrinking grid-search relocation algorithm in order to obtain accurate relative locations. After this relocation most aftershocks form a tight cluster around the mainshock at depths between 44 and 53 km. Subsequently, waveforms from 12 stations giving the best possible azimuthal coverage around the Kythira event were inverted in order to investigate its source process. A parallel, non-negative least-squares inversion technique utilizing multiple time windows was used to derive the spatiotemporal slip distribution. The fault surface was parameterized by subfaults of 3 km x 3 km size covering a length and down-dip width of 91 and 100 km, respectively. Inversion results indicate that the fault plane is probably the one dipping towards SE. The slip distribution model showed that there are two areas of large slip (similar to 60 cm), the largest extending between 38 and 80 km depth and a smaller one at depths 65-82 km. The moment rate function consists of a large initial peak with a duration of about 11 s followed by a number of smaller peaks, probably due to coseismic slip on some of the subfaults. Furthermore, the hypocenters of the relocated aftershocks coincide with the areas of minimum slip (<10 cm) while the hypocenter of the mainshock is located near the edge of the larger slip patch. Sensitivity and resolution tests confirmed the adequacy of the inversion parameters used and the stability of the solution. The Kythira earthquake was probably caused by the contortion of the downgoing African slab that results in the development of along-strike compression forces in the Kythira strait. (C) 2009 Elsevier B.V. All rights reserved.
關聯:	PHYSICS OF THE EARTH AND PLANETARY INTERIORS
顯示於類別:	[地球物理研究所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	414	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....