Heightened odds of large earthquakes near Istanbul: An interaction-based probability calculation

Parsons T., Toda S., Stein R., Barka A., Dieterich J.

SCIENCE, vol.288, no.5466, pp.661-665, 2000 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 288 Issue: 5466
  • Publication Date: 2000
  • Doi Number: 10.1126/science.288.5466.661
  • Journal Name: SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.661-665
  • Istanbul Technical University Affiliated: No


We calculate the probability of strong shaking in Istanbul, an urban center of 10 million people, from the description of earthquakes on the North Anatolian fault system in the Marmara Sea during the past 500 years and test the resulting catalog against the frequency of damage in Istanbul during the preceding millennium. Departing from current practice, we include the time-dependent effect of stress transferred by the 1999 moment magnitude M = 7.4 Izmit earthquake to faults nearer to Istanbul. We find a 62 +/- 15% probability (one standard deviation) of strong shaking during the next 30 years and 32 +/- 12% during the next decade.