| During the periods where the earth warms up dramatically, there is an increase in sunspot activity. |
| It is also believed that an increase in sunspot activity can have an affect on pole reversal. |
| They are more frequent every eleven years, a cycle that corresponds with maximum sunspot activity. |
| Scientists have noticed that sunspot activity tends to follow a regular cycle that peaks every 11 years. |
| Until now, Dr. Wolff said, there have been only indirect and inconclusive evidence for Rossby waves through sunspot observations. |
| Many magnetic storms occurred in tandem with reports of solar flares or of large sunspot regions near the Sun's equator. |
