Table 1.
Summary of vent-specific gas compositions and fluxes.
| Vent | CO2/SO2 | R2 | n (s) | H2O/SO2 | R2 | n (s) | SO2 mol% | CO2 mol% | H2O mol% | SO2 (kg s−1) | CO2 (kg s−1) | H2O (kg s−1) | Total (kg s−1) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Passive | |||||||||||||
| S1 | 6.26 ± 0.76 | 0.82 | 230 | 22.8 ± 9.2 | 0.54 | 83 | 3.3 | 20.8 | 75.8 | 0.14 ± 0.02 | 0.6 ± 0.1 | 0.9 ± 0.14 | 1.6 |
| C (FL1) | 0.91 ± 0.14 | 0.65 | 345 | 32.2 ± 1.6 | 0.93 | 496 | 2.9 | 2.7 | 94.4 | 1–1.43 ± 0.2 | 0.63–0.89 ± 0.15 | 9.1–13.0 ± 2.1 | 10.7–15.3 |
| C (FL2) | 0.82 ± 0.16 | 0.66 | 236 | 34.5 ± 2.9 | 0.9 | 236 | 2.8 | 2.3 | 95.0 | 1–1.43 ± 0.2 | 0.56–0.81 ± 0.15 | 9.7–13.9 ± 2.7 | 11.3–16.1 |
| C (average) | 2.8 | 2.5 | 94.7 | 1.22 ± 0.2 | 0.72 ± 0.15 | 11.4 ± 2.4 | 13.3 | ||||||
| N2 (FL1) | 10.7 ± 1.9 | 0.75 | 169 | 19.6 ± 5.2 | 0.64 | 125 | 3.2 | 34.2 | 62.6 | 0.47 ± 0.06 | 3.46 ± 0.6 | 2.59 ± 1.3 | 6.5 |
| N2 (FL2) | 13.4 ± 2.3 | 0.71 | 214 | 22.2 ± 7.0 | 0.3 | 356 | 2.7 | 36.6 | 60.7 | 0.47 ± 0.06 | 4.94 ± 0.9 | 1.64 ± 1.7 | 7.1 |
| N2 (average) | 3.0 | 35.4 | 61.6 | 0.47 ± 0.06 | 4.2 ± 0.8 | 2.1 ± 1.5 | 6.8 | ||||||
| Explosive | |||||||||||||
| N2 explosive (FL1) | 15.3 ± 1.2 | 0.93 | 212 | 12.4 ± 2.7 | 0.73 | 212 | 3.48 | 53.31 | 43.21 | ||||
| N2 explosive (FL2) | 18.8 ± 2.1 | 0.95 | 71 | 23.2 ± 3.5 | 0.91 | 71 | 2.33 | 43.72 | 53.95 | ||||
| N2 explosive (average) | 2.90 | 48.52 | 48.58 | ||||||||||
Fluxes were calculated by converting molar ratios to mass ratios and multiplying by the UV camera-derived SO2 fluxes. Bulk plume composition is an average composition measured over the duration of the campaign by the permanent Multi-GAS installation for monitoring.