
| Date | Zones | ||
|---|---|---|---|
| Polar | Auroral | Sub-Auroral | |
| 2013-04-19 | 20 | 7 | 3 |
| 2013-04-20 | 39 | 22 | 5 |
| 2013-04-21 | 24 | 7 | 5 |
| 2013-04-22 | 36 | 25 | 6 |
| 2013-04-23 | 59 | 37 | 8 |
| 2013-04-24 | 74 | 164 | 22 |
| 2013-04-25 | 55 | 60 | 10 |
| 2013-04-26 | 81 | 155 | 21 |
| 2013-04-27 | 49 | 72 | 9 |
| 2013-04-28 | 53 | 43 | 7 |
| 2013-04-29 | 36 | 32 | 7 |
| 2013-04-30 | 75 | 48 | 8 |
| 2013-05-01 | 73 | 191 | 29 |
| 2013-05-02 | 70 | 106 | 14 |
| 2013-05-03 | 61 | 37 | 9 |
| 2013-05-04 | 47 | 47 | 7 |
| 2013-05-05 | 80 | 59 | 8 |
| 2013-05-06 | 126 | 73 | 14 |
| 2013-05-07 | 109 | 105 | 16 |
| 2013-05-08 | 77 | 61 | 12 |
| 2013-05-09 | 57 | 42 | 8 |
| 2013-05-10 | 48 | 40 | 7 |
| 2013-05-11 | 48 | 28 | 7 |
| 2013-05-12 | 51 | 43 | 7 |
| 2013-05-13 | 75 | 33 | 9 |
| 2013-05-14 | 45 | 77 | 11 |
| 2013-05-15 | 100 | 39 | 12 |
| 2013-05-16 | 86 | 93 | 18 |
| 2013-05-17 | 74 | 100 | 13 |
| 2013-05-18 | 106 | 142 | 23 |
The parameter used for the 30 day magnetic activity review is a daily index. It is known as DRX and is the average of the hourly ranges (maximum minus minimum during each hour) in the X (northward) component of the magnetic field intensity for a day (the UT or GMT day), ie DRX for the zone is the mean of 24 values. The units are nanoteslas (nT).