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

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

7. strong tremor OKWE RSAM 7/137/207/278/038/108/17 amplitude (arb. units) Okmok eruption seismicity

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

9. Stations used for tremor analysis

10. Comparison of Amplitude Spectra

11. OKSOz-OKFGz inter-station times

12. Histograms of 10 inter-station times

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

14. new coneCone D caldera rim northsouth

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

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

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

20. Rayleigh radiation: VLP tremor depth

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

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

23. Precursory seismicity at Okmok

45. (the slope is 3/2)

48. ()