| Cat. | Threshold | start date | end date | Max. duration | Max. M | |
| SPI3 | M = −1.0 | 01/01/2010 | 06/01/2010 | 5 | −3.4 | |
|
| M = −1.5, −2.0, −2.5, −3.0 | 02/01/2010 | 06/01/2010 | 4 | −3.4 | |
| SPI6 | M = −1.0 | 10/01/1998 | 12/01/2001 | 38 | −3.54 | |
|
| M = −1.0 | 02/01/2009 | 05/01/2018 | 111 | −2.63 | |
| SPI48 | M = −1.5 | 01/01/2010 | 05/01/2018 | 100 | −2.63 | |