Spatial and temporal characteristics of aftershocks of the December 26, 2004 and March 28, 2005 earthquakes off NW Sumatra
2012 (English)In: Journal of Asian Earth Sciences, ISSN 1367-9120, Vol. 46, 150-160 p.Article in journal (Refereed) Published
Two aftershock series following the December 26, 2004 (M-w = 9.0) and the March 28, 2005 (M-w = 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.
Place, publisher, year, edition, pages
2012. Vol. 46, 150-160 p.
b-value, p-value, Aftershock, Sumatra earthquake, Threshold magnitude, Earthquake prediction
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:uu:diva-176907DOI: 10.1016/j.jseaes.2011.12.004ISI: 000304513800012OAI: oai:DiVA.org:uu-176907DiVA: diva2:537960