Temporal variations in the fractal properties of seismicity in the north anatolian fault zone between 31°E and 41°E

Ali Osman Öncel; Ian Main; Ömer Alptekin; Patience Cowie

Temporal variations in the fractal properties of seismicity in the north anatolian fault zone between 31°E and 41°E

Ali Osman Öncel^*, Ian Main, Ömer Alptekin, Patience Cowie

^*Corresponding author for this work

School of Geosciences

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

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 vanations in the seismic b value and the fractal (correlation) dimension D_c of earthquake epicenters are examined for earthquakes of magnitude M_s ≥ 4.5, using sliding windows of 100 consecutive events, b varies temporally between 0.6 and 1.0, and D_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 between b and D_c, consistent with previous observation of seismicity in Japan and southern California. Major events early in this century (M_S ≥ 7) are associated with low b and high D_c, respectively consistent with greater stress intensity and greater spatial clustering of epicenters - both implying a greater degree of stress concentration at this time.

Original language	English
Journal	Pure and Applied Geophysics
Volume	147
Issue number	1
Publication status	Published - 1 Dec 1996

Keywords / Materials (for Non-textual outputs)

Fractal dimension
North anatolian fault zone
Seismicity

Cite this

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title = "Temporal variations in the fractal properties of seismicity in the north anatolian fault zone between 31°E and 41°E",

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 vanations in the seismic b value and the fractal (correlation) dimension Dc of earthquake epicenters are examined for earthquakes of magnitude Ms ≥ 4.5, using sliding windows of 100 consecutive events, b varies temporally between 0.6 and 1.0, and Dc 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 between b and Dc, consistent with previous observation of seismicity in Japan and southern California. Major events early in this century (MS ≥ 7) are associated with low b and high Dc, respectively consistent with greater stress intensity and greater spatial clustering of epicenters - both implying a greater degree of stress concentration at this time.",

keywords = "Fractal dimension, North anatolian fault zone, Seismicity",

author = "{\"O}ncel, {Ali Osman} and Ian Main and {\"O}mer Alptekin and Patience Cowie",

year = "1996",

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T1 - Temporal variations in the fractal properties of seismicity in the north anatolian fault zone between 31°E and 41°E

AU - Öncel, Ali Osman

AU - Main, Ian

AU - Alptekin, Ömer

AU - Cowie, Patience

PY - 1996/12/1

Y1 - 1996/12/1

N2 - 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 vanations in the seismic b value and the fractal (correlation) dimension Dc of earthquake epicenters are examined for earthquakes of magnitude Ms ≥ 4.5, using sliding windows of 100 consecutive events, b varies temporally between 0.6 and 1.0, and Dc 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 between b and Dc, consistent with previous observation of seismicity in Japan and southern California. Major events early in this century (MS ≥ 7) are associated with low b and high Dc, respectively consistent with greater stress intensity and greater spatial clustering of epicenters - both implying a greater degree of stress concentration at this time.

AB - 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 vanations in the seismic b value and the fractal (correlation) dimension Dc of earthquake epicenters are examined for earthquakes of magnitude Ms ≥ 4.5, using sliding windows of 100 consecutive events, b varies temporally between 0.6 and 1.0, and Dc 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 between b and Dc, consistent with previous observation of seismicity in Japan and southern California. Major events early in this century (MS ≥ 7) are associated with low b and high Dc, respectively consistent with greater stress intensity and greater spatial clustering of epicenters - both implying a greater degree of stress concentration at this time.

KW - Fractal dimension

KW - North anatolian fault zone

KW - Seismicity

UR - http://www.scopus.com/inward/record.url?scp=0030454326&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0030454326

SN - 0033-4553

VL - 147

JO - Pure and Applied Geophysics

JF - Pure and Applied Geophysics

IS - 1

ER -

Temporal variations in the fractal properties of seismicity in the north anatolian fault zone between 31°E and 41°E

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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