| Year | Date | D (ind. m−3) | L (mm) | B (ml・m−3) | t1/2 (d) | References |
| 2007 | 8 August | 867 ± 121 | 5 ± 3 | 312 | 0.8 | [9] |
| 2008 | 10 September | 196 ± 118 | 5 ± 3 | 78 | 3.4 | [18] |
| 2009 | 26 August | 66 ± 13 | 9 ± 5 | 66 | 4.0 | [18] |
| 2010 | 18 August | 3.2 ± 0.2 | 40 ± 8 | 41 | 6.3 | [17] |
| 2011 | 17 November | 41 ± 3.8 | 4.7 ± 0.3 | 13 | 19.6 | [17] |
| 2012 | 2 October* 28 November* | - - | - - | - - | - - | [21] |
| 2013 | 23 September | 54 ± 12 | 6.1 ± 2.5 | 47.9 | 2.1 | [21] |
| 2014 | 23 September | 255 ± 117 | 5.8 ± 1.6 | - | 2.2 | [20] |