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Larsen et al . (2009) EOS

2008 eruption of Okmok. Larsen et al . (2009) EOS. Okmok deformation from InSAR. Lu et al . (2005) JGR. Okmok eruption seismicity. OKWE RSAM. amplitude (arb. units). 7/13. 7/20. 7/27. 8/03. 8/10. 8/17. strong tremor. VLP tremor during Okmok eruption.

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Larsen et al . (2009) EOS

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  1. 2008 eruption of Okmok Larsen et al. (2009) EOS

  2. Okmok deformation from InSAR Lu et al. (2005) JGR

  3. Okmok eruption seismicity OKWE RSAM amplitude (arb. units) 7/13 7/20 7/27 8/03 8/10 8/17 strong tremor

  4. VLP tremor during Okmok eruption VLP tremor has been previously reported by De Lauro et al. (2005) at Stromboli

  5. Stations used for tremor analysis

  6. Comparison of Amplitude Spectra

  7. OKSOz-OKFGz inter-station times

  8. Histograms of 10 inter-station times

  9. Tremor located NNW of Cone D Haney (2010) JGR, in press

  10. caldera rim new cone Cone D north south

  11. Similar phase velocity for Love waves, so a similar inter-station time expected

  12. Horizontal components Sign flip on OKFGt Not similar to ZZ or RR

  13. Radiation pattern for a vertical CLVD Azimuth constrained by Love waves, source depth by Rayleigh waves

  14. Rayleigh radiation: VLP tremor depth

  15. Ambient noise tomography of Okmok approx. edge of caldera Masterlark, Haney, et al. (2010) JGR

  16. Radiation pattern for a vertical CLVD Haney (2010) JGR, in press

  17. Precursory seismicity at Okmok

  18. (the slope is 3/2)

  19. ( )

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