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Saturday, July 14, 2012

Minor geomagnetic storm in progress (Kp5) as CME impacts Earth BY CHILLYMANJARO


Email Email The CME cloud, generated by an X1.4 Solar Flare on Thursday around Sunspot 1520,  hit Earth’s magnetic field on July 14th at approximately 18:11 UTC. 43 minutes earlier, at 17:28 UTC, measurements made by the ACE spacecraft indicated a shock arrival. Solar wind speeds increased from 350 km/s to around 630 km/s and the IMF (interplanetary magnetic field) increased from 4 nT to around 17 nT. All of these signatures are congruent with the arrival of a CME at ACE...


he CME cloud, generated by an X1.4 Solar Flare on Thursday around Sunspot 1520,  hit Earth’s magnetic field on July 14th at approximately 18:11 UTC. 43 minutes earlier, at 17:28 UTC, measurements made by the ACE spacecraft indicated a shock arrival. Solar wind speeds increased from 350 km/s to around 630 km/s and the IMF (interplanetary magnetic field) increased from 4 nT to around 17 nT. All of these signatures are congruent with the arrival of a CME at ACE and later here at Earth.

Current 3-hour estimated Planetary K Index is showing Kp5 Levels for the past six hours
G1 (minor) Geomagnetic Storm activity is now in progress. It could reach G2 (moderate) levels through the weekend. Solar radiation storm remains at S1 (minor) solar radiation.

The Satellite Environment Plot combines satellite and ground-based data to provide an overview of the current geosynchronous satellite environment. (Source: Proton Flux from GOES-13, Electron Flux from GOES-13 & GOES-15/NOAA)
The arrival of the CME shook Earth’s magnetic field, which in turn induced electrical currents in the ground at Arctic latitudes. Rob Stammes measured the effect from his magnetic observatory  at the Polar Light Center in Lofoten, Norway as shown on SpaceWeather.com. Stammes has observed many CME strikes and he says this one was not particularly strong, at least in terms of ground currents.

ACE 24 Hour (Estimated) EPAM Protons (Updates every 5 minutes)
After the arrival of the CME, an increase from quiet to minor storm levels was observed. A greater than 10 MeV proton event  is still in progress. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during the period. Radio Blackouts conditions remains at R1 (Minor) radio blackout level.

Global D-Region Absorption
Conditions are favorable for auroras over high-latitude places around polar cycle, Scandinavia, Canada and Siberia. Geomagnetic storming could intensify and bring auroras to middle latitudes as well. It should be wonderful display across the night sky.

CURRENT CONDITIONS

Solar wind
speed: 667.1 km/sec
density: 11.9 protons/cm3
The Radio Sun10.7 cm flux: 147 sfu
Planetary K-index
Now: Kp= 5 storm
24-hr max: Kp= 5 storm
Interplanetary Mag. Field
Btotal8.3 nT
Bz2.6 nT north