Table 3 Water-soluble species on volcanic ash samples of the 2018–2019 eruption at Kuchinoerabujima Volcano
Sample ID | Date of eruption | F* | Cl* | SO4* | Na* | NH4* | K* | Mg* | Ca* | Cl/SO4** | (Na + K)/Cl** | Ca/SO4** |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
18-Keb02-4 | 21st Oct. 2018 | 354.2 | 2484.0 | 3566.5 | 584.3 | 7.1 | 80.3 | 98.0 | 2631.3 | 1.89 | 0.39 | 1.77 |
18-Keb03-1 | 26th Oct. 2018 | 354.9 | 1719.3 | 19,684.7 | 437.0 | 0.0 | 56.9 | 58.9 | 8529.4 | 0.24 | 0.42 | 1.04 |
18-Keb07-2 | 5th Nov. 2018 | 325.7 | 1128.1 | 12,273.8 | 315.4 | 0.0 | 43.6 | 45.0 | 5429.1 | 0.25 | 0.47 | 1.06 |
18-Keb09 | 12th Nov. 2018 | 387.7 | 2021.8 | 8658.6 | 576.8 | 0.0 | 85.7 | 79.1 | 4469.4 | 0.63 | 0.48 | 1.24 |
18-Keb12-1 | 20th Nov. 2018 | 244.8 | 570.4 | 7846.1 | 272.5 | 0.0 | 17.5 | 27.1 | 3309.1 | 0.20 | 0.76 | 1.01 |
18-Keb15 | 6th Dec. 2018 | 479.8 | 2572.0 | 22,610.9 | 479.3 | 0.0 | 81.4 | 90.9 | 10,036.3 | 0.31 | 0.32 | 1.06 |
18-Keb17 | 18th Dec. 2018 | 466.6 | 2315.0 | 79,124.1 | 2135.3 | 16.5 | 120.6 | 479.6 | 29,034.2 | 0.08 | 1.47 | 0.88 |
18-Keb19-1 | 28th Dec. 2018 | 127.5 | 1815.9 | 29,738.1 | 1099.9 | 0.0 | 183.7 | 416.7 | 10,845.4 | 0.17 | 1.03 | 0.87 |
19-Keb03-3 | 17th Jan. 2019 | 235.1 | 724.5 | 82,760.6 | 434.7 | 0.0 | 85.4 | 381.3 | 29,152.4 | 0.02 | 1.03 | 0.84 |
19-Keb06 | 20th Jan. 2019 | 134.8 | 4725.5 | 55,724.3 | 684.0 | 0.0 | 57.2 | 940.2 | 21,172.4 | 0.23 | 0.23 | 0.91 |
19-Keb09-2 | 29th Jan. 2019 | 57.8 | 1195.3 | 23,466.3 | 850.1 | 0.0 | 93.5 | 352.9 | 7851.9 | 0.14 | 1.17 | 0.80 |