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Analyzing Seismic and Deformation Data from the 2008 Okmok Eruption

This study reviews key findings from multiple sources regarding the 2008 Okmok eruption, focusing on volcanic tremor, seismic activity, and ground deformation. It discusses the amplitudes of seismic signals, VLP (very low frequency) tremors detected, and inter-station correlations during the eruption period. The research utilizes InSAR data to investigate deformation patterns and explores the radiation patterns of seismic waves (Love and Rayleigh waves) to infer source characteristics. Comparative analyses and tomographic results are included to deepen understanding of volcanic processes at Okmok.

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Analyzing Seismic and Deformation Data from the 2008 Okmok Eruption

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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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