ISSN:
1420-9136
Keywords:
Seismicity
;
fractal dimension
;
North Anatolian fault zone
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract We investigate the nature of temporal variations in the statistical properties of seismicity associated with the North Anatolian Fault Zone between longitudes 31°–41°E during the instrumental period 1900–1992. Temporal variations in the seismicb value and the fractal (correlation) dimensionD c of earthquake epicenters are examined for earthquakes of magnitudeM S ≥4.5, using sliding windows of 100 consecutive events.b varies temporally between 0.6 and 1.0, andD c between 0.6 and 1.4, both representing significant fluctuations above the errors in measurement technique. A strong negative correlation (r=−0.85) is observed betweenb andD c , consistent with previous observation of seismicity in Japan and southern California. Major events early in this century (M S ≥7) are associated with lowb and highD c , respectively consistent with greater stress intensity and greater spatial clustering of epicenters—both implying a greater degree of stress concentration at this time.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00876441
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