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HomeScienceGiant 500,000-kilometre butterfly-shaped hole pops up on Sun, stuns scientists

Giant 500,000-kilometre butterfly-shaped hole pops up on Sun, stuns scientists

A coronal hole is an opening in the Sun’s atmosphere. It forms when magnetic fields open and plasma escapes.

September 15, 2025 / 15:20 IST
Giant Butterfly-Shaped Hole Appears on Sun (Image: NASA)

A spectacular butterfly-shaped hole has appeared on the Sun’s surface. NASA’s Solar Dynamics Observatory captured the image on September 11. This enormous feature is venting solar wind toward Earth. Why is this coronal hole significant?

What Is a Coronal Hole and Why Is It Significant?

A coronal hole is a gap in the atmosphere of the Sun. It develops when magnetic fields become open and plasma escapes. These regions appear dark in telescope images. The plasma normally bright in the Sun’s atmosphere is absent. The recent hole stretches about 500,000 kilometres wide. Its striking butterfly shape stands out among recent observations. Scientists say its size makes it especially notable.

How Does the Solar Wind Affect Earth?

The gaseous material from the hole travels toward Earth. Solar wind streams can trigger geomagnetic storms on Earth. These storms range from G1 (minor) to G2 (moderate). They may affect satellites and technological systems. The likelihood increases due to the Russell-McPherron effect. This effect boosts magnetic connection near equinox periods. The timing raises chances of disturbances this week.

Why Are Scientists Closely Watching This Event?

The Solar Dynamics Observatory’s images help scientists study the event. The data provide a reference for future analysis. Researchers are tracking the approach of the solar wind. They hope to understand more about space weather. The butterfly-shaped coronal hole shows ongoing solar activity. It provides a live demonstration of the Sun-Earth connection.

As the solar wind reaches, scientists watch for geomagnetic activity. This occurrence demonstrates the dynamic nature of our Sun. Updates are in the pipeline as the situation unfolds. Scientists keep on watching for potential effects on Earth.

first published: Sep 15, 2025 03:20 pm

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