NASA Space Alerts
@NASASpaceAlerts • 1,189,999 subscribers
@NASA official notifications on cosmic activity in near-Earth space including solar events, asteroids, comets, and meteors.
Shorts
Videos
It’s #SunDay! Here’s your space weather report for the week of July 3 - July 9: • 1 X-class flare • 36 M-class flares • 3 C-class flares • 42 coronal mass ejections • 1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. The Sun celebrated the fourth of July with a big bang, emitting an intense X-class solar flare ( and a burst of M-class flares. You can see the show starting at about 0:49 in the video. Learn more about space weather:
NASA Space Alerts91,100 Aufrufe • vor 6 Tagen
It’s #SunDay! Here’s your space weather report for the week of June 26 - July 2: • 1 X-class flare • 24 M-class flares • 50 coronal mass ejections • 0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. The Sun put on its own fireworks show this week! 🎇 Most of this week’s flare activity came from Active Region 14479, which unleashed a barrage of M-class flares and one X-class flare, visible here beginning at about 2:09 in the video. Learn more about space weather:
NASA Space Alerts45,637 Aufrufe • vor 13 Tagen
It’s #SunDay! Here’s your space weather report for the week of June 19 - 25: • 4 M-class flares • 0 C-class flares • 42 coronal mass ejections • 0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. All the action this week comes from two clustered active regions, AR14472 and AR14473. You can see them rotate onto the Sun’s disk from the Eastern limb (left side of the Sun) starting at about 0:30 into the video, and continue with several flares and bright coronal loops through about 1:30. Quite a show! 🤩 Learn more about space weather:
NASA Space Alerts45,791 Aufrufe • vor 20 Tagen
You’ve heard about asteroid 2024 YR4, so let’s talk about it. What are the chances it’ll hit Earth? Why do those odds keep changing? Should you be worried? (Spoiler alert: No). Get the facts from a NASA expert and find the latest info on this asteroid at:
NASA Space Alerts674,371 Aufrufe • vor 1 Jahr
It’s #SunDay! Here’s your space weather report for the week of May 1 - 7: •2 M-class flares •2 C-class flares •29 coronal mass ejections •1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. It has been a relatively quiet week on the Sun, with the two M-class flares erupting off the Sun’s western limb (right side from SDO’s view) and not producing much impact on Earth. However, a large active region will soon be rotating into Earth’s view — you can see it toward the end of this video emerging from the eastern limb (left side from SDO's view). Keep an eye out in the coming week for potential solar activity! Learn more about space weather:
NASA Space Alerts102,183 Aufrufe • vor 2 Monaten
It’s #SunDay! Here’s your space weather report for the week of June 5 - 11: • 1 M-class flare • 5 C-class flares • 36 coronal mass ejections • 1 geomagnetic storm (as of June 12, though another one is currently forecast for June 13) This video from NASA’s Solar Dynamics Observatory shows the week’s activity. This week’s most powerful flare was an M1.8 on June 6, which erupts from the southeastern (lower left) region of the Sun’s disk at about 0:42 in this video. That eruption also produced a coronal mass ejection that reached Earth three days later, but the bulk of the blast was oriented to the south and east of Earth, so the effect on our planet was minimal. Learn more about solar flares and coronal mass ejections:
NASA Space Alerts47,540 Aufrufe • vor 1 Monat
It’s #SunDay! Here’s your space weather report for the week of May 29 - June 4: • 1 X-class flare • 6 M-class flares • 47 coronal mass ejections • 0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. This week’s main event was the X-class flare on June 3, appearing at 2:26 in the video. Though that flare was this week’s brightest event, a few seconds before at 2:20 in the video, an M7-class flare erupts that might appear to the human eye to be even more impressive. In part, that’s because of the nice view of the burst of solar plasma (ultimately producing a coronal mass ejection) that erupts from the region right after the flare. Wow! 🤩 Learn more about space weather:
NASA Space Alerts41,603 Aufrufe • vor 1 Monat
It’s #SunDay! Here’s your space weather report for the week of April 10 - 16: • 30 coronal mass ejections (CMEs) • 0 M-class flares • 0 C-class flares associated with CMEs • 0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity, which was very quiet. Some C-class flares did occur on the Sun during this period, but none were associated with coronal mass ejections (CMEs) or other space weather events, so they are not reported here. Active region AR4419 first rotates onto the solar disk from the eastern limb (upper left edge) at about 1:20 into the video, then comes alive with lots of crackles and bursts starting at about 2:00 and continuing through the end. Its activity contrasts with the two other active regions on the Sun, AR4415, which moves across the Sun’s equatorial region, and AR4416, in the upper hemisphere, both of which showcase steadier, smoother brightenings of coronal loops. We’ll be watching all of these regions of possible activity in the coming week.
NASA Space Alerts81,554 Aufrufe • vor 3 Monaten
It’s #SunDay! Here’s your space weather report for the week of May 22 - 28: • 1 M-class flare • 0 C-class flares • 46 coronal mass ejections • 0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. Most of the action this week was on the far side of the Sun, out of SDO’s view. However, we do see a good example of a prominence beginning at about 20 seconds into the video on the lower western limb (right side edge) of the Sun. Prominences are huge clouds of electrified gas called plasma suspended in the solar atmosphere. Learn more about space weather:
NASA Space Alerts45,128 Aufrufe • vor 1 Monat
It’s #SunDay! Here’s your space weather report for the week of May 8 - 14: •1 M-class flare •1 C-class flare •31 coronal mass ejections •0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. The active region we spotted last week (which erupted with an M-class flare and a CME last Sunday) has moved across the Sun and is now center-disk. It’s right next to a coronal hole that unleashed a stream of fast solar wind to Earth. We’ll be watching both regions for continued activity this week. Learn more about space weather:
NASA Space Alerts51,009 Aufrufe • vor 2 Monaten
It’s #SunDay! Here’s your space weather report for the week of April 17 - 23: •6 M-class flares •0 C-class flares •34 coronal mass ejections •1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. Two X-class flares erupted right after the end of this reporting period — they’ll be first up in next week’s space weather report! Another thing we *don’t* see here: comet PANSTARRS (C/2025 R3)! The comet is currently passing between the Sun and Earth, and ESA/NASA’s SOHO spacecraft is watching the comet as it streaks across the view of its C3 coronagraph. We'll share more views of that comet later; in the meantime, check the latest imagery here: Learn more about space weather:
NASA Space Alerts58,811 Aufrufe • vor 2 Monaten
It’s #SunDay! Here’s your space weather report for the week of April 24 - 30: • 2 X-class flares • 14 M-class flares • 18 coronal mass ejections • 0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s solar activity. Two X-class flares erupt on the right side of the disk at the beginning of the week. On April 29, a few spacecraft calibration maneuvers make it look like the Sun is dancing. Find out more about flares & coronal mass ejections:
NASA Space Alerts52,109 Aufrufe • vor 2 Monaten
It’s #SunDay! Here’s your space weather report for the week of April 3 - 9: •7 M-class flares •1 M-class flares •16 coronal mass ejections •1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. This week’s geomagnetic storm peaked on April 3, sparking auroras around the arctic circle and reaching a strength classification of G3 (strong). The cause was a CME that erupted from the Sun late on April 1. Aside from that, the Sun was fairly quiet during this reporting period. Learn more about space weather:
NASA Space Alerts62,343 Aufrufe • vor 3 Monaten
It’s #SunDay! Here’s your space weather report for the week of May 15 - 21: • 4 M-class flares • 3 C-class flares • 35 coronal mass ejections • 1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. It was a fairly calm week on the Sun. A coronal mass ejection last week reached Earth on May 15, triggering a minor geomagnetic storm and leading to aurora sightings across the northern U.S. On May 20, SDO's Helioseismic and Magnetic Imager (HMI) paused normal science operations for a series of routine calibration maneuvers — measurements that keep the instrument's magnetic field and Doppler velocity data scientifically accurate. You can see these maneuvers starting at about 2:29 in the video. Learn more about space weather:
NASA Space Alerts34,954 Aufrufe • vor 1 Monat
It’s #SunDay! Here’s your space weather report for the week of March 13-19: •5 M-class flares •1 C-class flare •39 coronal mass ejections •1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. On the 18th (about 2:28 in the video) another celestial body made an appearance in SDO’s footage. Is that the silhouette of Earth, or the Moon? How can you tell? Correct answer and explanation coming Monday! More on flares & coronal mass ejections:
NASA Space Alerts46,297 Aufrufe • vor 3 Monaten
It’s #SunDay! Here’s your space weather report for the week of March 27 - April 2: •1 X-class flare •2 M-class flares •46 coronal mass ejections •1 geomagnetic storm This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. This week’s X-class flare, visible starting about 1:23 in this video, is a very pretty arcade of blooming loops of solar plasma. The same active region that produced the flare also unleashed a coronal mass ejection that reached Earth on April 1… but that’s not what produced this week’s geomagnetic storm on April 2! 👇
NASA Space Alerts32,735 Aufrufe • vor 3 Monaten
It’s #SunDay! Here’s your space weather report for the week of Feb. 6 - 12: •9 M-class flares •1 C-class flare •30 coronal mass ejections •0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. After a very “eruptive” last week, the Sun has calmed back down a bit. The active region responsible for last week’s torrent of flares — AR4366 — still produced all of this week’s M-class flares, but has not produced any more X-class flares so far. It rotates off of the Sun’s Earth-facing disk about half-way through the video.
NASA Space Alerts37,320 Aufrufe • vor 5 Monaten
It’s #SunDay! Here’s your space weather report for the week of March 6 - March 12: •0 M-class flares •2 C-class flares •27 coronal mass ejections •0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. Another pretty quiet week on the Sun. Like last week, we’re ending with another large coronal hole stretching across the Sun, seen here as a dark “stripe” running diagonally from the upper right to bottom left.
NASA Space Alerts31,675 Aufrufe • vor 4 Monaten