Table 5. Estimated exposure of Kyushu Electric Power Company network to tephra fall; see Fig. 2(b). Approximations of electricity lines given by KEPC and Isomass contours by AIST (2011).
From: Observations of tephra fall impacts from the 2011 Shinmoedake eruption, Japan
| Â | Approximated length (km) | Facilities affected | ||||
|---|---|---|---|---|---|---|
Tephra load (kg/m2) | 500 kV | 220 kV | 110 kV | 60 kV | Hydro stations | Transforming stations |
0–0.5 | 3.4 | 59.3 | 28.3 | 44.6 | 3 | 8 |
0.5–1 |  | 5.5 | 4.4 | 12.2 | 1 | 1 |
1–2 |  | 3.3 | 1.3 | 16.2 |  | 2 |
2–3 |  | 4.6 | 1.8 | 10.9 |  | 1 |
3–5 |  | 4.9 | 2 | 16.6 |  | 1 |
5–10 |  | 5.2 | 2.4 | 21.2 |  | 2 |
10–30 |  | 5.5 | 4.3 | 1.5 |  | 1 |
Total | 3.4 | 88.3 | 44.5 | 123.2 | 4 | 16 |