کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4731541 | 1640418 | 2012 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Spatial and temporal characteristics of aftershocks of the December 26, 2004 and March 28, 2005 earthquakes off NW Sumatra Spatial and temporal characteristics of aftershocks of the December 26, 2004 and March 28, 2005 earthquakes off NW Sumatra](/preview/png/4731541.png)
Two aftershock series following the December 26, 2004 (Mw = 9.0) and the March 28, 2005 (Mw = 8.6) earthquakes off coast of NW Sumatra are studied. Deduced space heterogeneity of b-values, in the Gutenberg–Richter formula, and p-values, in the Omori law, show significant variations. General agreement is found between areas of high b and areas of significant slip predicted by different source models presented by other workers. Correlation with high p-values does exist, however, is less pronounced. The largest aftershocks occur during or near time periods when b-values reach their local minima. To examine the stability of results, two global earthquake catalogues (ISC and NEIC), different threshold magnitudes, moving-window lengths and moving steps were employed. The presented b- and p-distributions exhibit high confidence levels.
► We studied two aftershocks of Sumatra mainshocks of December 26, 2004 and March 28, 2005.
► Space heterogeneities of b- and p-values are robust and real.
► Temporal perturbations of b-values are robust and real.
► We found an agreement between areas of high b and areas of significant slip.
► Correlation with high p-values does exist, however, is less pronounced.
Journal: Journal of Asian Earth Sciences - Volume 46, 2 March 2012, Pages 150–160