The Sun's activity waxes and wanes over an 11-year cycle. This cycle is driven by changes in the Sun's magnetic field. When the field is strong, the Sun is more active. When the field is weak, the Sun is less active.

Solar Cycle 25 began in December 2019. This means that the Sun is now entering a period of increased activity. Over the next few years, we can expect to see more sunspots, flares, and coronal mass ejections (CMEs).

What does this mean for Earth?

Solar activity can have a number of effects on Earth. Sunspots can disrupt radio communications. Flares can cause power outages and interfere with satellite communications. CMEs can cause geomagnetic storms, which can damage power grids and other infrastructure.

The good news is that these effects are usually not severe. Most sunspots, flares, and CMEs do not cause any problems at all. However, during periods of high solar activity, these events can become more frequent and more intense. This can lead to problems for businesses, government, and even for individual citizens.

What can we do to prepare?

There are a number of things that we can do to prepare for periods of high solar activity. These include:

* Investing in space weather monitoring. The better we can monitor solar activity, the better we can predict when problems are likely to occur.

* Developing early warning systems. Early warning systems can give us time to prepare for solar storms and to minimize their effects.

* Protecting critical infrastructure. We need to make sure that our power grids, communications systems, and other critical infrastructure are resilient to the effects of solar storms.

By taking these steps, we can help to minimize the effects of solar activity on our planet.

For more information about Solar Cycle 25, please visit:

* [NASA's Solar Cycle 25 website](https://www.nasa.gov/mission_pages/sunearth/science/solar-cycle-25/)

* [NOAA's Space Weather website](https://spaceweather.gov/)