Introduction to Seismology

Earth Sciences Department

King Fahd University of Petroleum & Minerals

Chapter1Chapter2Chapter3 Chapter4 Chapter5Chapter6Chapter7Chapter8

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seismic hazard map, eastern Canada

Earthquake Hazard Analysis

King-Fahd University of Petroleum and Minerals, P.O.Box:1946, Dhahran 31261, Saudi Arabia, Telephone: (966) (03) 860-1661  Fax : (966)(250) 860-2595


Earthquake Rate, Frequency and Probability

  • Frequency-Magnitude Model through the Saudi Arabia (Oncel, 2006)
  • Microzonation Model of Saudi Arabia (Al-Amri, 2005)
  • Earthquake Parameters for subzones of SA
  • Interrelationship between Mmax and Tectonic Stress in SA
  • Magnitude-Prediction Models (Wells and Coppersmith, 1994)
  • Compared Microzone Model to Macrozone Model of SA
  • Compared different microzoning models for Eastern of SA
  • Compared microzones models to current seismicity
  • Case Work: Seismic Hazard of Eastern Arabia (Abdalla and Al-Homoud, 2004)

        What are the Annual Rates of M7 events of Regions (1 and 2)?

        What is the Recurrence Time of M7 events of Regions (1 and 2)?

        What is the Poissonian Probability of M7 events of Regions (1 and 2) in 30 yr?

Probabilistic Seismic Hazard Analysis (PSHA)

o       Seismic source characterization

         Example: North Anatolian Fault Zone (NAFZ)

v     Long-Term Earthquake Occurrence of NAFZ

v     Paleoseismology

o       Estimation of seismicity (recurrence) parameters for each source

         Example: Cascadia Subduction Zone

v     Time-Dependent Probability versus Recurrence Times

v     Magnitude-Area Relations

v     Developing  Uniform Earthquake Catalogues

v     Magnitude-Frequency Models

o       Selection of ground motion attenuation models

         Attenuation of Intensity with Distance

         Physics of Attenuation Formulae

         Comparison of M7.5 Attenuations Models

o       Quantification of the seismic hazard

         Probabilistic Seismic Hazard Analysis Problem

         Hazard Integral and Poisson Probability (Cornell, 1968)

         Statistical Approach to Seismic Hazard

v     Example 1:  Calculation of PGA values by Cornell Equation, based upon the measured distances

v     Example 2:  Calculation of Probability for PGA values

v     Example 3: Calculation of PGA values for any Probability