Faulting Style and b-Value: A Global Perspective

  • Emad Al-HeetyEmail author
  • Losyan Al Esho
Conference paper
Part of the Advances in Science, Technology & Innovation book series (ASTI)


The b-value in the frequency-magnitude relation provides significant information to understand seismicity, seismotectonics, and seismic hazard analysis. In this study, we investigated the relation between the b-value and faulting style on a global scale. The used data were extracted from the Global Centroid Moment Tensor (GCMT) catalog. The least square fit and maximum likelihood methods were used to calculate the b-value. The obtained results show that thrust, strike-slip and normal-faulting earthquakes, occur in regions of low, intermediate, and high b-values, respectively. Our results are in good agreement with the previous works, and we found that the study scale does not affect the hypothesis of a general relationship between faulting style and the b-values (bnormal > bstrike-slip > breverse).


b-constant Normal fault Reverse fault Strike-slip Maximum likelihood 


  1. 1.
    Gutenberg, B., Richter, C.: Frequency of earthquakes in California. Bull. Seismol. Soc. Am. 34, 185–188 (1944)Google Scholar
  2. 2.
    Mogi, K.: Magnitude-frequency relation for elastic shocks accompanying fractures of various materials and some related problems in earthquakes. Bull. Earthq. Res. Inst. Univ. Tokyo 40, 831–853 (1962)Google Scholar
  3. 3.
    Scholz, C.: The frequency—magnitude relation of microfracturing in rock and its relation to earthquakes. Bull. Seismol. Soc. Am. 58, 339–415 (1968)Google Scholar
  4. 4.
    Rordríguez-Pérez, Q., Zuũiga, F.: Imaging b-value depth variations within the Cocos and Rivera plates at the Mexican subduction zone. Tectonophysics 734–735, 33–43 (2018)CrossRefGoogle Scholar
  5. 5.
    Kalyoncuoglu, U., Elitok, O., Dolmaz, M.: Tectonic implications of spatial variation of b-values and heat flow in the Aegean region. Mar. Geophys. Res. 34, 59–78 (2013)CrossRefGoogle Scholar
  6. 6.
    Schorlemmer, D., Wiemer, S., Wyss, M.: Variations in earthquake-size distribution across different stress regimes. Nature 437, 539–542 (2005)CrossRefGoogle Scholar
  7. 7.
    Gulia, L., Wiemer, S.: The influence of tectonic regimes on the earthquake size distribution: a case study for Italy. Geophys. Res. Lett. 37(L110305) (2010). Scholar
  8. 8.
    Bora, D., Borah, K., Mahanta, R., Borgohain, J.: Seismic b-values and its correlation with seismic moment and Bouguer gravity anomaly over Indo-Burma ranges of northeast India: Tectonic implications. Tectonophysics 728–729, 130–141 (2018)CrossRefGoogle Scholar
  9. 9.
    Woessner, J., Wiemer, S.M.: Assessing of the quality of earthquakes catalogues: estimating the magnitude of copletenes and its uncertainty. Bull. Seisml. Soc. Amer. 95, 684–698 (2005)CrossRefGoogle Scholar
  10. 10.
    Aki, K.: Maximum likelihood estimate of b in the formula logN = a−bM and its confidence. Bull. Seismol. Soc. Am. 43, 237–239 (1965)Google Scholar
  11. 11.
    Wu, Y., Chen, S., Huang, T., Huang, H., Chao, W., Koulakov, I.: Relationship between earthquake b-values and crustal stresses in a young orogenic belt. Geophys. Res. Lett. (2018). Scholar
  12. 12.
    Scholz, C.: On the stress dependence of the earthquake b value. Geophys. Res. Lett. 42, 1399–1402 (2015). Scholar

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Applied GeologyUniversity of AnbarRammadiIraq
  2. 2.Department of GeologyUniversity of MosulMosulIraq

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