Table 5 Age and volume of eruptive products and estimated eruption rate of Yokodake during the last 34 ky and 3.4 ky
Unit | Age (ka) | Volume (DRE, km3) | Span (ky) | Eruption rate (km3/ky) |
|---|---|---|---|---|
Y9-T tephra | 0.6 | 5 × 10−4 | ||
Y9 lava | 0.6 | 3 × 10−3 a | ||
NYk-2 tephra | 2.4–2.2b | 8 × 10−4 | ||
Y8 lava | 3.4 | 3 × 10−2 a | ||
Total 1 | 3.4 × 10−2 | 3.4 | 1.0 × 10−2 | |
Y7 lava | N.D. | 4 × 10−2 a | ||
Y6 lava | N.D. | 3 × 10−2 a | ||
Yt-Pm4 tephra | 34c | 2 × 10−1 d | ||
Total 2 | 3.04 × 10−1 | 34 | 9.0 × 10−3 |