{"id":5764,"date":"2012-07-28T04:57:50","date_gmt":"2012-07-28T04:57:50","guid":{"rendered":"http:\/\/www.iiees.ac.ir\/fa\/?p=5764"},"modified":"2012-07-28T04:57:50","modified_gmt":"2012-07-28T04:57:50","slug":"b","status":"publish","type":"post","link":"http:\/\/old.iiees.ac.ir\/fa\/b\/","title":{"rendered":"\u0645\u0637\u0627\u0644\u0639\u0647 \u062a\u063a\u06cc\u06cc\u0631\u0627\u062a \u067e\u0627\u0631\u0627\u0645\u062a\u0631 b \u062f\u0631 \u0646\u0648\u0627\u062d\u06cc \u0632\u0645\u06cc\u0646 \u0633\u0627\u062e\u062a\u06cc \u0627\u0644\u0628\u0631\u0632 \u0648 \u0622\u0630\u0631\u0628\u0627\u06cc\u062c\u0627\u0646(\u0627\u06cc\u0631\u0627\u0646)"},"content":{"rendered":"
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<\/strong><\/div>\n
<\/strong><\/p>\n<\/div>\n
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\u063a\u0644\u0627\u0645 \u062c\u0648\u0627\u0646 \u062f\u0648\u0644\u0648\u06cc\u06cc<\/div>\n

<\/p>\n

<\/div>\n

\u0686\u06a9\u06cc\u062f\u0647<\/strong><\/p>\n

\n
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<\/div>\n

<\/p>\n

\u0648\u0627\u0698\u0647<\/strong>\u200c\u0647\u0627\u06cc \u06a9\u0644\u06cc\u062f\u06cc<\/strong><\/p>\n

\u06af\u0633\u0644 \u0634\u0645\u0627\u0644 \u062a\u0628\u0631\u06cc\u0632\u060c \u0627\u0644\u0628\u0631\u0632\u060c b-value\u060c \u0644\u0631\u0632\u0647 \u062e\u06cc\u0632\u06cc\u060c \u067e\u06cc\u0634 \u0628\u06cc\u0646\u06cc <\/p>\n

Study of b-value Variation in Alborz & Azerbaijan Seismotectonic Regions in Iran<\/strong><\/div>\n

Authors:P. Mobayen, Kh. Hessami Azar, Gh. Javan Doloie<\/p>\n

<\/p>\n

Abstract<\/strong><\/p>\n

\n
b-value, as one the most commonly used parameters in seismology, provides a suitable scale of seismic rate at a given region. From Gutenberg-Richter relation i.e.
Log N= a-bM, we have “b-value” representing dip angle of frequency-magnitude relation of the region earthquakes. In this study, we use the map of b-value variations across two tectonic regions in Iran namely; Alborz and Azerbaijan.
We have used separate catalogues and different time windows to investigate and process the seismic data of the two regions. To process the data and produce the b-value map we have invoked the ZMap 6.0 program which can be run under MATLAB software.<\/div>\n
\n
The map of b-value variations in the Alborz region (1996-2010) indicates that within the time window 1996-2004 both western and eastern parts of the Alborz suffer from high stress values. While, after the Kojur earthquake (i.e. the 2004-2010 period) the stress level in the eastern part of the Alborz has relatively decreased. Within this time window, however, in the western half across the Rudbar, North Qazvin and Alamautrud faults, where were highly stressed during 1996-2004, the stress level has also decreased.
The map of b-value variations in the Azerbaijan region (1996-2010) indicates the b value in the range of 0.6 to 1.8 throughout the region. There is no earthquake larger than M=5 in the time period 1996-2010 to be used as a reference event to interpret the stress distribution of the region. The b-value changes from 0.8 to 1.0 along the North Tabriz fault so that in the eastern part the b map shows lower values comer to the central and western parts.<\/div>\n

<\/div>\n<\/p><\/div>\n

<\/p>\n


Keywords:<\/strong><\/p>\n

b-value, North Tabriz Fault, Alborz, Seismicity, Prediction<\/div>\n","protected":false},"excerpt":{"rendered":"

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