Solar flares are classified using the X-ray brightness ( see an explanation here ), and "X class" flares are the strongest.  The s...

SDO will see 4 lunar transits between April and July 2025. Two look like the Moon is just brushing by the Sun and one is pretty nice looking...

At 12 noon PT, 4 Feb 2025, the HMI/AIA JSOC at Stanford has resumed normal data services. A small fraction of the data files were lost and a...

The JSOC repair continues. This week we have started serving 15 min cadence images from AIA and HMI for Space Weather operators and others a...

A cooling water line burst in the Stanford building housing the SDO HMI JSOC yesterday. Several inches of water were in the JSOC room. As of...

SDO images look partial today as we are off-pointed to look for the tail of Comet C/2025 S1 (ATLAS) as it goes by perihelion. This is a Kreu...

A cable cut in New Mexico is causing some of the SDO telemetry to be delayed to the science teams. As a result, the teams do not know the ro...