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

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

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

44. Stations used for tremor analysis

45. Comparison of Amplitude Spectra

46. OKSOz-OKFGz inter-station times

47. Histograms of 10 inter-station times

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

49. new coneCone D caldera rim northsouth

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

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

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

55. Rayleigh radiation: VLP tremor depth

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

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