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What is a coronal mass ejection?
A coronal mass ejection (CME) is a significant release of plasma and magnetic field from the solar corona. These eruptions can send billions of tons of solar material into space at high speeds, often impacting Earth's magnetic field and atmosphere.
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How do solar activities affect Earth’s atmosphere?
Solar activities, including CMEs, can disrupt Earth's magnetic field and lead to geomagnetic storms. These storms can affect satellite operations, power grids, and even radio communications, while also creating beautiful auroras in the polar regions and sometimes at lower latitudes.
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What role does the Sun play in creating auroras?
The Sun emits charged particles that, when they collide with gases in Earth's atmosphere, create the colorful displays known as auroras. The intensity and visibility of these lights can increase during solar events like CMEs, making them more likely to be seen in areas further from the poles.
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Are there any health risks associated with solar storms?
While solar storms can disrupt technology and infrastructure, they do not pose direct health risks to humans on the ground. However, astronauts and high-altitude pilots may be exposed to increased radiation during significant solar events, necessitating precautions.
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When can I see the northern lights again?
The northern lights can be seen during periods of heightened solar activity, particularly following CMEs. While sightings are more common in polar regions, they can occasionally be viewed in lower latitudes, such as the UK, especially during strong solar events.
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What are the best conditions for viewing the aurora borealis?
To maximize your chances of seeing the aurora borealis, look for clear skies away from city lights. The best viewing times are typically during the night when solar activity is high, and the auroras are most vibrant.