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Simple maps Waveforms over various distances & angles Simple shake maps Comparison with GMPE’s

Quick notes on the Jan 23, 2014 Ml 5.1 Jizan earthquake P. Martin Mai, Kiran Thingbaijam , Zheng Tang. Overview. Jan 23, 2014, Jizan Earthquake. Simple maps Waveforms over various distances & angles Simple shake maps Comparison with GMPE’s. Mainshock Info. Mainshock Info.

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Simple maps Waveforms over various distances & angles Simple shake maps Comparison with GMPE’s

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  1. Quick notes on the Jan 23, 2014 Ml 5.1 Jizan earthquakeP. Martin Mai, KiranThingbaijam, Zheng Tang

  2. Overview Jan 23, 2014, Jizan Earthquake • Simple maps • Waveforms over various distances & angles • Simple shake maps • Comparison with GMPE’s

  3. Mainshock Info

  4. Mainshock Info

  5. Sizeable Aftershock

  6. Aftershocks & Faulting Style

  7. SeismicStations & Waveforms

  8. SeismicStations & Waveforms

  9. Overview Jan 23, 2014, Jizan Earthquake • Simple maps • Waveforms over various distances & angles • Simple shake maps • Comparison with GMPE’s

  10. Sixclosestations

  11. Sixclosestations

  12. Sixclosestations

  13. Stationstowardsthe NE

  14. Stationstowardsthe NW

  15. Overview Jan 23, 2014, Jizan Earthquake • Simple maps • Waveforms over various distances & angles • Simple shake maps • Comparison with GMPE’s

  16. Shakemaps PGA

  17. Shakemaps PGV

  18. Shakemaps PSA, 0.3 s

  19. Shakemaps PSA, 1.0 s

  20. Shakemaps PSA, 3.0 s

  21. Overview Jan 23, 2014, Jizan Earthquake • Simple maps • Waveforms over various distances & angles • Simple shake maps • Comparison with GMPE’s

  22. Ground-motion comparison All “raw” data

  23. Ground-motion comparison Compare with GMPE: Akkar & Bommer (2006) -- BA 06

  24. Ground-motion comparison Compare with GMPE: Boore & Atkinson (2008) -- BA 06

  25. Initial summary & questions Jan 23, 2014, Jizan Earthquake • We notice distinct wave-propagation effects in different directions (SW; NE; NW) • Two stations have nice/clean S-wave pulse that may reveal the source signature • Shake-map patterns variable for different GM-metrics • Ground-motions consistent with GMPE for M ~5 out to ~500km; after that quick decay with distance (attenuation) • When was the last earthquake of similar size or larger in this region? • Faulting style? Geological structure? Fault? • Damage? People? Reactions?

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