Table 1 Temporal variation of 90Sr activity concentration in the air over Tsukuba
Sampling start date and time (JST) | End date and time (JST) | 90Sr activity concentration (mBq/m3) |
|---|---|---|
March 12 21 pm | March 13 9 am | nd |
March 13 21 pm | March 14 9 am | nd |
March 14 9 am | March 14 21 pm | nd |
March 14 21 pm | March 15 9 am | 1.50 ± 0.13 |
March 15 9 am | March 15 15 pm | 1.04 ± 0.095 |
March 15 15 pm | March 15 21 pm | nd |
March 15 21 pm | March 16 9 am | nd |
March 16 9 am | March 17 8 am | nd |
March 17 9 am | March 18 8 am | nd |
March 18 8 am | March 19 9 am | nd |
March 19 9 am | March 20 8 am | nd |
March 20 9 am | March 20 21 pm | nd |
March 20 21 pm | March 21 9 am | 1.32 ± 0.13 |
March 21 9 am | March 22 9 am | nd |
March 22 9 am | March 23 8 am | nd |
March 23 9 am | March 24 9 am | nd |
March 24 9 am | March 25 9 am | nd |
March 25 9 am | March 28 9 am | nd |
March 28 9 am | March 29 9 am | nd |
March 29 9 am | March 30 9 am | nd |