27 day magnetic activity forecast
View the Magnetic Activity Review
27 Day Magnetic Activity Forecast (Graphic)
27 Day Magnetic Activity Forecast (Text)
| Date | Zones | ||
|---|---|---|---|
| Polar | Auroral | Sub-Auroral | |
| 2021-03-26 | 40 | 50 | 13 |
| 2021-03-27 | 35 | 45 | 12 |
| 2021-03-28 | 35 | 35 | 11 |
| 2021-03-29 | 35 | 35 | 10 |
| 2021-03-30 | 35 | 60 | 10 |
| 2021-03-31 | 30 | 80 | 11 |
| 2021-04-01 | 30 | 65 | 11 |
| 2021-04-02 | 35 | 55 | 12 |
| 2021-04-03 | 35 | 25 | 10 |
| 2021-04-04 | 30 | 25 | 11 |
| 2021-04-05 | 25 | 20 | 11 |
| 2021-04-06 | 25 | 20 | 10 |
| 2021-04-07 | 25 | 20 | 12 |
| 2021-04-08 | 30 | 60 | 12 |
| 2021-04-09 | 35 | 75 | 10 |
| 2021-04-10 | 45 | 100 | 11 |
| 2021-04-11 | 35 | 75 | 13 |
| 2021-04-12 | 30 | 35 | 13 |
| 2021-04-13 | 30 | 20 | 10 |
| 2021-04-14 | 30 | 20 | 10 |
| 2021-04-15 | 35 | 50 | 10 |
| 2021-04-16 | 50 | 80 | 12 |
| 2021-04-17 | 50 | 100 | 12 |
| 2021-04-18 | 45 | 80 | 12 |
| 2021-04-19 | 35 | 80 | 10 |
| 2021-04-20 | 40 | 70 | 11 |
| 2021-04-21 | 50 | 60 | 13 |
Description
The parameter used for forecasting magnetic activity in the 27 day forecast 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). For example, the DRX for the zone is the mean of 24 values. The units are nanoteslas (nT).