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Sum of squared differences between the normalized MPs and normalized tweet counts. The normalized air dose rate of MP-5 and MP-6 showed a good fit to the normalized tweet count plot.
| Compared with tweet count | |
| Monitoring post | Sum of squared difference |
| MP-1 | 28.72 |
| MP-2 | 62.51 |
| MP-3 | 14.35 |
| MP-4 | 11.59 |
| MP-5 | 4.66 |
| MP-6 | 8.24 |
| MP-7 | 20.93 |
| MP-8 | 25.40 |
