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The Bz component of the interplanetary magnetic field (IMF) shifted sharply south (-20 nT) and the solar wind speed increased to above 600 km/s.. A moderate (G2) geomagnetic storm is now in progress. Aurora sky watchers should be alert once dark outside.

An unexpected Strong (G3) geomagnetic storm in progress thanks to the high speed solar wind stream flowing past Earth.

Solar activity reached moderate levels this morning with an M3.4 solar flare produced by AR 4100. A type II RE with an est. velocity of 538 km/s was recorded. A faint CME is seen emerging. Further update later today.

A long duration eruption reaching the M8+ level is currently in progress around AR 4100 near center disk. This event is likely going to produce a coronal mass ejection. Stay tuned. SolarHam.com

M8.2 eruption associated with a type II radio emission with an estimated velocity of 1938 km/s. Wide area of dimming confirms a CME is almost for certain. SolarHam.com

Official geomagnetic forecast calling for possible Strong (G3) to Severe (G4) geomagnetic storming beginning late on June 1st and could carry into June 2nd or 3rd. SolarHam.com

The CME associated with the M8 solar flare has arrived with a solar wind speed around 1000 km/s. A geomagnetic storm warning is now in effect. SolarHam.com

Severe (G4) geomagnetic storm threshold reached at 08:00 UTC (June 1). SolarHam.com

A potential active region off the northeast limb has been flinging plasma into space the past 24 hours. If a sunspot region is responsible, it should begin to rotate into view during the next 24-48 hours. Image by GOES SUVI.

Moderate (G2) geomagnetic storm watch issued for June 14th when a coronal hole stream is predicted to reach Earth. SolarHam.com

The Bz component of the interplanetary magnetic field (IMF) has been primarily tipped south the past few hours. Minor (G1) geomagnetic storming is currently being observed at higher latitudes. SolarHam.com

Bz continues to point south. A strong (G3) geomagnetic storm watch is in effect until 06:00 UTC (Jun 13).

M6.8 solar flare observed around AR 4105 nearing the west limb at 23:01 UTC (Jun 24).

An M2.2 solar flare this morning at 07:56 UTC is associated with a CME that appears to be directed mostly to the west. A further update will be provided if the CME has an Earth directed component.

Solar flare alert. A near X-Flare (M8.4) was just observed around now Earth facing sunspot region 4114 peaking at 18:05 UTC (Jun 15). More updates to follow.

M6.4 solar flare just detected around AR 4114 at 09:38 UTC (Jun 16). SolarHam.com

X-Flare alert. A strong solar flare measuring X1.2 (R3 Radio Blackout) was just observed around AR 4114 peaking at 21:49 UTC. The flare itself was fairly rapid, so a further update will be provided should any sort of CME be associated. More to follow.

X-Flare Alert. Sunspot region 4114 just produced an X1.9 solar flare peaking at 23:50 UTC (Jun 19). More details to follow.

Coronal hole #59 is now beginning to directly face Earth. A minor (G1) geomagnetic storm watch was added beginning June 25th when a high speed solar wind stream is predicted to reach Earth.

Geomagnetic Storm watch beginning on June 25th has been updated to possible G2 (Moderate) conditions. Storming could persist into June 26th thanks to an expected coronal hole stream. Probabilities in this graphic are estimated and will be adjusted at 22:00 UTC today.