What are Solar Flares?

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"Continuing Strong Solar Flares- May 15-16, 2024 (SVS14593 - SDO 131-171 5-15-2024 0845UT)" by NASA's Scientific Visualization Studio - KBR Wyle Services, LLC/Scott Wiessinger, KBR Wyle Services, LLC/Lacey Young, Global Science and Technology, Inc./Tom Bridgman, Wyle Information Systems/Mara Johnson-Groh / Wikimedia Commons (Public domain).

What are Solar Flares?

A solar flare is a sudden, powerful burst of energy from the Sun’s surface. These explosions happen when a large amount of magnetic energy built up in the Sun is suddenly released. Solar flares send out intense radiation, light, and heat into space. The energy from a single flare can be as strong as millions of nuclear bombs!

How Do Solar Flares Happen?

The Sun has a strong and ever-changing magnetic field. Sometimes, magnetic field lines on the Sun twist and tangle, like rubber bands being stretched. When the tension becomes too great, these lines snap and quickly reconnect. This sudden change lets out a huge amount of stored energy as a solar flare! Solar flares shoot out light across the electromagnetic spectrum—from radio waves to X-rays and beyond.

Different Sizes of Solar Flares

Scientists group solar flares by how powerful they are: A, B, C, M, and X. X-class flares are the strongest. Most flares are small and don’t cause problems on Earth, but the biggest flares can affect our planet.

Effects on Earth

Solar flares can cause space weather. They may interrupt radio signals, mess up GPS satellites, and even cause power grid problems. Flares can also make beautiful auroras—the northern and southern lights. Astronauts in space must be protected from the extra radiation.

Sunspots and Solar Flares

Solar flares often happen near sunspots, which are dark areas on the Sun where magnetic fields are strongest. Scientists watch the Sun all the time to predict and warn us about dangerous solar flares.

Safety Tip

Never look directly at the Sun, even during a solar flare! It can damage your eyes.

Solar flares are like the Sun throwing a tantrum—built-up magnetic stress suddenly releases in a massive explosion of energy that can reach Earth in just 8 minutes!

Interesting Fact: The largest solar flare ever recorded happened in 2003, and it was so strong that it overloaded sensors on satellites!

What is a solar flare?

A burst of energy from the SunA star in spaceA planet's orbitA new moon phase

What causes a solar flare?

Released magnetic energyWind on the SunMeteor strikesEarth's gravity

Which flares are the strongest?

A-classM-classX-classC-class

What do solar flares create in the sky?

AurorasCloudsRainbowsStorms

Why do scientists watch the Sun?

To forecast solar flaresTo count moonsTo find new planetsTo study rainbows

What can happen to satellites during big flares?