Appendix 2. Raw Electron Microprobe Geochemical Analyses of Glass from Augustine 2005-2006 Tephra Table 6 contains the data used to derive table 2 and figure 7 after analyses were filtered to eliminate the inclusion of mineral data and other bad data points. Raw data from table 6 were rejected if they met any of the following criteria: (1) Analyses totaling < 97 "wt. percent and >102 wt. percent , (2) Analyses with MgO >15 wt. percent (mafic mineral), (3) Analyses with Al2O3 >20 wt." "percent (feldspar), (4) Analyses with FeO >15 wt. percent (mafic mineral)." Table 6. Electron microprobe analyses of glass from Augustine 2005-2006 tephra. [All glass analyses were done on the Cameca SX-50 four-spectrometer electron microprobe at the University of Alaska Fairbanks. Glasses were "analyzed using a 15 KeV, 10 nA, 10 micron-wide defocused beam. Glass standard, KN-18, was routinely analyzed during glass analyses to" "monitor instrument drift. Sample locations are shown on Figure 1 for place names off the island, and Figure 3 for proximal on-island samples." "Indented numbers beneath sample numbers (AT-) represent individual points of analysis of that sample. nd, no data.]" Sample no. SiO2 TiO2 Al2O3 FeO MgO CaO Na2O K2O MnO Cl Total Collection location or station no. Eruption Date Material Late Presurcory Phase- December 2005 AT-703A TP001 Dec-05 glass separate 203 77.80 0.42 13.94 2.44 0.23 1.31 2.29 1.52 nd 0.05 98.34 clear glass 250 77.42 0.06 13.20 0.71 0.15 1.50 5.00 1.94 nd 0.02 99.15 clear glass 223 77.39 0.94 12.04 2.40 0.76 1.63 2.09 2.57 nd 0.19 96.44 clear glass 210 77.02 0.03 13.20 1.08 0.10 1.93 3.77 2.85 nd 0.02 97.53 clear glass 204 76.62 0.10 12.48 1.86 0.30 2.48 5.19 0.51 nd 0.46 98.37 clear glass 252 76.34 0.22 13.50 1.12 0.19 3.24 4.52 0.83 nd 0.04 98.70 clear glass 222 76.11 0.05 14.75 0.63 0.22 2.38 4.06 1.77 nd 0.04 98.09 clear glass AT-703B TP001 232 74.64 1.76 12.42 1.32 0.38 1.39 2.58 5.12 nd 0.39 98.16 brown glass 235 74.41 0.43 13.60 2.40 0.24 2.62 5.18 0.87 nd 0.26 97.64 brown glass 236 74.19 0.35 13.04 2.34 1.09 2.66 3.95 2.22 nd 0.16 96.84 brown glass 237 72.49 1.88 13.47 2.20 0.26 2.07 4.31 3.04 nd 0.28 98.12 brown glass Explosive Phase - January 11 (Events 1 and 2) AT-746 Pedro Bay 1/11/06 glass separate 78.94 0.11 12.62 0.96 0.16 2.53 4.18 0.48 nd 0.02 99.38 clear glass 750 77.16 0.12 11.74 1.40 0.12 0.93 4.39 3.84 nd 0.30 99.32 clear glass 722 76.93 0.50 12.15 1.71 0.36 1.76 4.40 2.06 nd 0.12 99.12 clear glass 758 76.84 0.26 12.28 1.70 0.22 1.69 4.57 2.22 nd 0.21 100.11 clear glass 751 76.75 0.12 12.87 1.42 0.10 1.13 4.08 3.45 nd 0.07 99.34 clear glass 746 76.66 0.31 11.91 2.16 0.24 1.67 4.65 2.12 nd 0.28 99.44 clear glass 739 76.13 0.24 12.68 1.90 0.39 3.16 5.12 0.37 nd 0.02 100.26 clear glass 737 65.74 1.16 15.94 4.50 2.39 4.04 4.25 1.85 nd 0.13 99.14 brown glass 753 65.50 0.49 16.31 4.30 2.11 5.51 4.46 1.29 nd 0.03 97.10 brown glass AT-769 Pedro Bay 1/11/06 glass separate 72 78.06 0.46 12.55 1.15 0.16 1.91 4.43 1.27 nd 0.00 100.38 clear glass 69 66.65 0.76 16.34 3.59 0.88 4.94 5.10 1.67 nd 0.06 98.84 brown glass AT-753 Pedro Bay 1/11/06 glass separate 539 65.73 1.10 17.23 3.83 1.76 4.06 4.77 1.35 nd 0.16 99.18 brown glass AT-761 Pedro Bay 1/11/06 glass separate 470 76.36 0.00 12.63 1.73 0.24 1.76 4.79 2.31 nd 0.18 98.28 clear glass 474 64.18 1.28 16.37 4.89 1.26 5.37 4.83 1.55 nd 0.28 99.31 brown glass "Explosive Phase - January 13-14, 2006 (Events 3-8)" AT-957B KW026 1/13Ð1/14/06 dense low-silica andesite 134 66.38 0.73 16.30 4.06 0.93 5.16 4.56 1.63 0.00 0.24 100.22 136 67.01 0.94 15.28 3.66 1.15 5.28 4.64 1.73 0.05 0.26 99.36 141 67.23 0.77 15.89 3.35 0.86 4.40 5.22 1.81 0.17 0.30 100.50 143 67.24 0.74 13.99 5.59 1.30 4.03 5.05 1.55 0.09 0.41 100.46 142 67.73 1.42 14.67 4.13 1.08 4.49 4.47 1.73 0.04 0.23 100.00 135 67.84 1.26 14.16 4.30 1.07 4.27 4.95 1.86 0.05 0.24 100.84 132 68.56 0.91 14.79 4.07 0.56 4.16 4.75 1.76 0.04 0.40 99.92 145 69.31 1.00 14.25 3.85 0.74 3.80 4.91 1.84 0.07 0.23 98.43 AT-920A KW034 1/13Ð1/14/06 dense low-silica andesite 531 67.07 0.98 16.06 4.08 1.00 4.54 4.63 1.48 0.00 0.16 97.60 AT-967D KW040 1/13Ð1/14/06 dense low-silica andesite 817 70.66 0.18 16.55 0.60 0.06 2.63 6.03 3.29 0.00 0.00 98.69 815 70.70 0.26 15.98 1.40 0.07 2.34 5.88 3.29 0.05 0.03 101.88 AT-960A KW034 1/13Ð1/14/06 low-silica andesite scoria 1006 66.66 1.20 15.32 3.84 1.27 4.80 4.85 1.70 0.08 0.28 98.75 AT-920B KW034 1/13- 1/14/06 low-silica andesite scoria 594 66.04 1.34 14.08 5.56 1.94 4.58 4.44 1.58 0.15 0.31 99.64 AT-967A KW039 1/13Ð1/14/06 low-silica andesite scoria 1023 65.29 1.16 14.81 6.30 1.45 4.52 4.13 1.63 0.09 0.60 99.49 1028 66.78 1.23 13.92 4.95 1.46 4.11 5.13 1.84 0.20 0.38 96.49 1027 68.04 0.90 14.39 4.00 1.77 3.93 4.81 1.63 0.11 0.43 98.01 AT-912D KW026 1/13Ð1/14/06 high-silica andesite 521 74.28 0.32 11.96 3.49 0.41 2.05 5.11 2.08 0.11 0.19 98.14 509 74.66 0.18 12.88 2.73 0.43 2.00 4.57 1.98 0.04 0.53 101.38 518 74.72 0.43 11.93 2.48 0.49 2.06 5.41 2.02 0.08 0.37 96.98 514 74.92 0.08 12.91 1.72 0.43 2.02 5.21 2.12 0.11 0.48 101.70 511 74.99 0.38 12.41 2.11 0.51 2.30 4.80 2.12 0.10 0.28 96.27 515 75.70 0.16 12.45 1.76 0.43 2.19 4.75 2.10 0.11 0.36 98.34 512 75.71 0.19 13.03 1.47 0.43 2.09 4.64 2.14 0.11 0.20 97.31 Explosive Phase - January 17 (Event 9) AT-924A KW037 1/17/06 low-silica andesite scoria 859 65.16 0.98 16.40 4.05 1.29 5.90 4.54 1.36 0.04 0.28 97.81 860 67.66 0.68 15.75 4.94 1.38 2.45 4.97 1.69 0.25 0.22 97.94 AT-934A KW081 1/17/06 low-silica andesite scoria 643 65.82 1.10 14.18 4.96 1.65 4.61 5.19 1.88 0.03 0.58 98.84 641 66.76 1.10 14.02 5.00 1.47 4.14 5.33 1.74 0.08 0.37 98.94 AT-905B KW082 1/17/06 low-silica andesite scoria 439 68.62 0.68 14.17 3.85 1.34 3.76 4.15 2.96 0.26 0.21 99.21 442 68.66 1.21 14.64 3.67 1.00 3.63 5.03 1.68 0.14 0.35 98.39 AT-943A KW037 1/17/06 low-silica andesite scoria 898 68.46 1.14 13.09 5.36 1.22 3.49 4.73 1.87 0.22 0.43 97.37 AT-949A KW082 1/17/06 low-silica andesite scoria 977 64.79 0.99 15.64 4.27 1.68 5.56 5.15 1.46 0.06 0.39 96.44 AT-940B KW037 1/17/06 dense low-silica andesite 153 64.88 0.87 16.40 4.77 1.20 5.71 4.45 1.37 0.21 0.13 100.77 147 67.05 0.69 15.54 3.72 1.06 5.04 4.74 1.66 0.32 0.19 98.32 AT-923A KW037 1/17/06 dense low-silica andesite 164 65.57 1.11 16.44 4.55 0.93 4.96 4.56 1.49 0.15 0.24 100.62 203 66.34 0.91 14.66 5.38 1.33 4.32 5.04 1.84 0.08 0.11 101.97 202 67.95 1.04 14.21 5.47 0.74 4.48 4.49 1.38 0.14 0.10 99.05 AT-961C KW037 1/17/06 high-silica andesite 1058 74.38 0.64 11.78 3.51 0.41 1.92 4.80 2.29 0.00 0.27 101.63 1063 74.89 0.59 11.76 2.06 0.46 2.16 5.01 2.21 0.13 0.72 100.53 AT-924C KW037 1/17/06 high-silica andesite 172 73.08 0.24 13.95 1.57 0.19 2.28 5.61 2.83 0.15 0.11 98.98 AT-925C KW037 1/17/06 high-silica andesite 227 74.54 0.36 12.06 2.83 0.45 2.20 5.31 2.02 0.00 0.23 100.34 232 74.94 0.33 12.94 2.01 0.45 2.00 4.94 2.01 0.04 0.34 101.51 AT-934B KW050 1/17/06 high-silica andesite 682 74.71 0.63 11.56 2.15 0.54 2.03 5.73 2.17 0.12 0.35 99.30 AT-757 Lake Iliamna Region 1/17/06 glass separate 367 70.59 0.06 16.83 1.34 0.09 3.34 4.78 2.87 nd 0.10 98.60 brown glass 364 70.71 1.00 14.97 2.64 0.38 3.34 4.76 2.04 nd 0.17 98.51 brown glass 394 76.93 0.27 11.49 1.99 0.46 0.74 3.62 4.29 nd 0.22 98.41 clear glass 398 77.67 1.05 11.01 1.58 0.07 0.23 2.78 5.44 nd 0.17 98.42 clear glass AT-759 Lake Iliamna Region 1/17/06 glass separate 424 72.07 0.52 15.56 1.60 0.23 2.15 5.58 2.15 nd 0.15 100.90 brown glass 407 72.13 0.10 14.49 2.53 0.50 3.07 5.07 1.99 nd 0.12 99.64 brown glass 418 72.43 0.22 16.55 1.21 0.21 4.64 3.90 0.84 nd 0.00 97.88 brown glass 440 76.41 0.00 12.54 1.64 0.36 0.89 3.41 4.74 nd 0.01 98.43 clear glass AT-751 Lake Iliamna Region 1/17/06 glass separate 491 70.70 0.97 13.69 3.18 0.60 3.32 5.01 1.99 nd 0.55 98.54 brown glass 532 72.63 0.28 14.56 2.53 0.43 2.84 4.79 1.70 nd 0.26 99.38 brown glass 516 72.84 2.37 11.64 3.35 0.74 1.77 4.57 2.44 nd 0.28 99.83 brown glass 507 76.41 0.47 12.51 1.74 0.35 1.90 4.24 2.07 nd 0.30 99.99 clear glass AT-744 Lake Iliamna Region 1/17/06 glass separate 604 76.10 0.44 12.15 2.03 0.30 1.78 4.66 2.16 nd 0.38 100.10 clear glass 590 75.42 0.62 12.65 2.29 0.40 2.04 4.35 1.97 nd 0.25 99.53 clear glass 614 74.40 1.40 12.72 1.83 0.27 2.18 4.64 2.51 nd 0.04 101.11 clear glass 593 70.74 0.10 17.21 1.42 0.29 3.80 4.84 1.55 nd 0.06 98.34 brown glass AT-748 Lake Iliamna Region 1/17/06 glass separate 642 75.77 0.30 12.37 2.13 0.47 1.60 4.75 2.53 nd 0.07 99.56 clear glass 639 71.64 0.57 16.78 0.84 0.03 1.58 5.40 3.14 nd 0.01 100.73 brown glass AT-767 Lake Iliamna Region 1/17/06 glass separate 97 72.03 0.21 14.84 1.78 0.62 3.96 4.48 1.87 nd 0.21 97.26 brown glass 95 76.54 0.17 13.40 1.11 0.13 2.57 4.19 1.66 nd 0.23 99.07 clear glass AT-764 Lake Iliamna Region 1/17/06 glass separate 125 77.84 0.14 11.52 1.80 0.27 1.08 4.66 2.61 nd 0.08 101.56 clear glass 166 76.12 0.37 12.72 2.02 0.35 1.43 4.16 2.64 nd 0.19 99.38 clear glass AT-762 Lake Iliamna Region 1/17/06 glass separate 170 76.09 0.50 13.42 1.97 0.85 2.11 3.61 1.43 nd 0.03 101.03 clear glass 171 75.55 0.35 12.16 2.46 0.06 0.26 3.33 5.82 nd 0.02 99.67 clear glass 208 72.27 0.62 16.23 1.44 0.24 4.20 4.28 0.72 nd 0.00 99.56 brown glass 190 71.58 0.35 16.32 1.24 0.07 2.65 4.71 3.09 nd 0.00 99.42 brown glass Exlposive Phase - January 27-28 (Events 10-13) AT-928A KW032 1/27Ð1/28/06 high-silica andesite 678 75.96 0.29 12.14 1.27 0.15 2.00 5.37 2.55 0.07 0.20 98.29 664 76.24 0.31 13.08 0.68 0.16 2.13 4.87 2.27 0.20 0.05 99.98 AT-932A KW035 1/27Ð1/28/06 dense low-silica andesite 469 66.05 1.48 13.77 5.42 1.46 4.49 5.06 1.70 0.19 0.36 97.45 AT-917A KW032 1/27/06 dense low-silica andesite 492 71.71 0.54 14.92 1.73 0.21 3.68 5.14 1.96 0.00 0.11 100.47 AT-916 KW031 1/27Ð1/28/06 glass separate 344 75.51 0.18 12.81 1.80 0.43 2.01 4.93 2.12 0.00 0.21 99.66 clear glass AT-719 NE Homer 1/28/06 glass separate 300 74.71 0.00 14.40 0.60 0.21 1.52 5.15 3.41 nd 0.00 100.46 clear glass AT-733 S-SE-Kodiak 1/27Ð1/28/06 glass separate 413 69.28 0.60 15.88 2.79 0.85 4.09 4.52 1.72 0.03 0.24 98.80 brown glass "Continous Phase - January 28- February 10, 2006" AT-770 W-Pope Vanoy 1/28Ð2/10/6 glass separate 661 78.04 0.84 11.73 1.34 0.28 1.49 4.06 1.99 nd 0.22 99.76 clear glass 695 77.40 0.08 11.85 1.30 0.53 1.63 4.73 2.41 nd 0.07 98.85 clear glass 675 76.95 0.51 12.38 1.52 0.12 1.13 4.84 2.37 nd 0.18 101.90 clear glass 683 76.20 0.94 12.15 1.75 0.30 1.21 4.29 2.88 nd 0.28 98.76 clear glass 657 76.02 0.91 12.65 1.26 0.25 1.37 4.29 3.01 nd 0.23 99.63 clear glass 694 75.97 1.03 12.60 1.59 0.26 1.54 4.48 2.21 nd 0.32 101.34 clear glass 687 75.21 0.18 13.03 2.29 0.38 1.26 4.77 2.68 nd 0.21 99.83 clear glass 693 75.15 0.95 12.87 1.80 0.16 1.65 4.78 2.36 nd 0.28 100.32 clear glass 690 68.86 0.31 17.39 1.69 0.84 3.81 5.50 1.53 nd 0.07 99.84 brown glass 685 68.44 0.00 18.76 1.23 0.28 6.41 3.51 1.31 nd 0.05 98.71 brown glass AT-913 KW032 1/28Ð2/10/6 glass separate 394 76.44 0.23 11.81 2.16 0.35 1.75 4.69 2.24 0.12 0.22 100.92 clear glass 395 75.67 0.42 12.25 1.46 0.37 2.03 5.33 2.20 0.10 0.17 99.82 clear glass 393 75.16 0.37 12.71 1.79 0.39 2.15 4.86 2.08 0.25 0.23 97.83 clear glass 386 75.14 0.54 12.80 1.88 0.42 2.03 4.75 2.13 0.18 0.13 100.63 clear glass AT-909 KW035 1/28Ð2/10/6 glass separate 280 77.12 0.26 12.12 1.00 0.36 1.89 4.28 2.57 0.17 0.24 98.76 clear glass 271 75.88 0.29 12.39 1.56 0.49 2.05 4.73 2.17 0.26 0.17 99.10 clear glass 269 75.79 0.65 12.82 1.38 0.25 1.58 4.51 2.75 0.08 0.21 100.76 clear glass 267 75.52 0.47 12.51 2.00 0.18 2.01 4.58 2.45 0.15 0.13 100.10 clear glass 273 75.42 0.29 13.31 1.61 0.41 2.12 4.55 2.11 0.05 0.14 99.33 clear glass 282 64.76 0.48 18.03 3.37 1.40 6.19 4.26 1.30 0.17 0.04 97.40 brown glass AT-953 KW030 1/28Ð2/10/6 glass separate 240 76.81 0.53 12.70 1.47 0.13 1.91 3.86 2.26 0.14 0.20 98.74 clear glass 243 76.10 0.29 12.64 1.40 0.38 1.82 4.85 2.24 0.04 0.24 99.50 clear glass 242 75.59 0.21 13.15 1.64 0.36 2.33 4.47 1.97 0.00 0.29 99.02 clear glass 245 75.23 0.45 12.37 2.00 0.43 2.08 4.97 2.19 0.00 0.30 98.32 clear glass 257 68.85 0.21 15.27 2.86 1.12 4.45 3.76 3.23 0.14 0.10 97.01 brown glass 261 67.79 0.95 15.65 3.16 0.98 4.23 4.88 1.80 0.12 0.44 98.76 brown glass Effusive Phase - March 3-March 16 AT-915 KW049 3/3Ð3/16/06 glass separate 374 75.02 0.38 12.72 1.96 0.42 1.95 4.98 2.10 0.17 0.29 101.95 clear glass 368 74.39 0.28 12.61 2.08 0.30 2.25 5.48 2.06 0.13 0.41 101.15 clear glass 380 74.34 0.46 12.50 2.34 0.43 2.13 5.19 2.27 0.11 0.24 102.45 clear glass 376 66.16 0.64 15.93 3.83 1.00 4.63 5.72 1.65 0.20 0.24 100.59 brown glass 377 64.29 0.62 15.92 4.57 2.50 5.43 4.74 1.34 0.38 0.21 100.42 AT-919 KW034 3/3Ð3/16/06 glass separate 300 74.94 0.40 12.64 1.93 0.44 2.04 5.11 2.20 0.06 0.24 97.45 clear glass 286 65.33 0.70 15.78 3.61 1.19 5.44 5.59 1.67 0.19 0.50 99.57 brown glass