NASA Space Alerts(@NASASpaceAlerts):It’s #SunDay! Here’s your space weather report for the week of Aug 14 - 20: • 4 M-class flares • 3 C-class flares • 22 coronal mass ejections • 0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. All of this week’s M-class flares happened in the last two days of this reporting period. Their source is the active region AR14513, which appears as a bright cluster that rotates into view from the Sun’s eastern limb (left side) starting on the 19th, about 2:30 into this video. We’ll keep an eye on this busy active region as it moves into an Earth-facing position over the coming days. Related: New NASA-funded efforts to predict active regions before they emerge:

2026.08.23 16:00

It’s #SunDay#! Here’s your space weather report for the week of Aug 14 - 20: • 4 M-class flares • 3 C-class flares • 22 coronal mass ejections • 0 geomagnetic storms This video from NASA’s Solar Dynamics Observatory (SDO) shows the week’s activity. All of this week’s M-class flares happened in the last two days of this reporting period. Their source is the active region AR14513, which appears as a bright cluster that rotates into view from the Sun’s eastern limb (left side) starting on the 19th, about 2:30 into this video. We’ll keep an eye on this busy active region as it moves into an Earth-facing position over the coming days. Related: New NASA-funded efforts to predict active regions before they emerge: