A G1-class (Kp=5) geomagnetic storm is in progress

A G1-class (Kp=5) geomagnetic storm is in progress

High-latitude sky watchers should be alert for auroras. A G1-class (Kp=5) geomagnetic storm is in progress.NOAA Space Weather Scale for Geomagnetic StormsSolar windspeed:

A fast-moving stream of solar wind is buffeting Earth’s magnetic field

A fast-moving stream of solar wind is buffeting Earth’s magnetic field

A fast-moving stream of solar wind is buffeting Earth’s magnetic field. The combined effect of this stream plus a CME expected to arrive on June 24th has prompted NOAA forecasters to declare a 30% to 35% chance of geomagnetic storms during the next 24 hours.

Geomagnetic storm warning!

Geomagnetic storm warning!

A fast-moving stream of solar wind is buffeting Earth’s magnetic field. The combined effect of this stream plus a CME expected to arrive soon has prompted NOAA forecasters to declare a 30% to 35% chance of geomagnetic storms on June 23-24. High-latitude sky watchers

Impact of solstice solar flare is expected on June 24th

Impact of solstice solar flare is expected on June 24th

A CME propelled toward Earth by the “solstice solar flare” of June 21st may be moving slower than originally thought. Analysts at the GSFC Space Weather Lab have downgraded the cloud’s probable speed from 800 km/s to 650 km/s. Impact is now expected on June 24th at

Incoming solar flare, expecting geomagnetic storm

Incoming solar flare, expecting geomagnetic storm

Magnetic fields above sunspot complex 1236 erupted during the early hours of June 21st, producing a C7-class solar flare and a full-halo CME. The expanding cloud appears to be heading almost directly toward

Wonderful weekend auroras for start of May

Wonderful weekend auroras for start of May

It has been a good weekend for northern sky watchers. A solar wind stream hit Earth’s magnetic field on Saturday, sparking two days of auroras around the Arctic Circle. In Alberta, Canada, this morning, the month of May began with a psychedelic sky:High-latitude

Solar winds blowing earthward from Sun’s new coronal hole

Solar winds blowing earthward from Sun’s new coronal hole

NASA’s Solar Dynamics Observatory is monitoring a hole in the sun’s atmosphere – a “coronal hole.” It is the dark region circled in this extreme ultraviolet image taken during the early hours of April 28th: Coronal holes are places where the sun’s magnetic field

Earth is entering a stream of solar wind

Earth is entering a stream of solar wind

Earth is entering a stream of solar wind blowing ~500 km/s, and the encounter is stirring up geomagnetic activity around the Arctic Circle. The solar wind data (velocity and proton density) presented on spaceweather.com are updated every 10 minutes. They are derived