Table 1 Locations and specifications for Holes 1 and 2 at the ITA observatory
Hole | Latitude (°) | Longitude (°) | Altitude (m) | Total depth (m) | Screened depth (m) | Depth of gravel filter pack outside casing (m) | Diameter of casing (m) | Borehole diameter at the screened depth (m) |
|---|---|---|---|---|---|---|---|---|
1 | 34.4530 | 136.3129 | 295.56 | 600.0 | 547.6–558.5 | 521.7–565.5 | 0.151 | 0.270 |
2 | 34.4534 | 136.3129 | 300.74 | 208.3 | 145.5–156.4 | 140.2–157.4 | 0.151 | 0.270 |