Click here to log in with
October 28, 2021
by Lina Tran, NASA
The sun emitted a significant solar flare on October 28, 2021 at 11:35 a.m. EDT. NASA’s Solar Dynamics Observatory, which is constantly observing the sun, captured a picture of the event.
Solar flares are strong bursts of radiation. The harmful radiation from a flare cannot penetrate the Earth’s atmosphere to physically affect people on the ground, but – if intense enough – it can disrupt the atmosphere in the layer where GPS and communication signals are transmitted.
The X class denotes the most intense flares, while the number gives more information about their strength. An X2 is twice as intense as an X1, an X3 is three times as intense, and so on. Flares classified as X10 or greater are considered unusually intense.
Use this form if you have identified a typographical error, inaccuracy, or if you would like to submit a change request to the contents of this page.
For general inquiries, please use our contact form.
For general feedback, use the public comments section below (please follow the guidelines).
Your feedback is important to us. Due to the high volume of messages, however, we cannot guarantee individual responses.
Your email address will only be used to let the recipient know who sent the email. Neither your address nor that of the recipient will be used for any other purpose.
The information you entered will appear in your email message and will not be stored in any form by Phys.org.
Receive weekly and / or daily updates in your inbox.
You can unsubscribe at any time and we will never pass your data on to third parties.