Geomagnetic Storm G2 and Mid Latitude Aurora

     A Geomagnetic Storm, NOAA Sclae G2 Moderate Kp=6,  causing a Mid Latitude Aurora, continues due to the arrival of a  CME that lifted off the solar disk on April 19th.  Solar wind velocities increased from 350 - 400 km/s. For the original post on the origins of this CME, read the original post here: CME arrival soon and sunspot update .   The CME arrived with a  Geomagnetic Sudden Impulse that was observed by NOAA at the Boulder CO magnetometer with a deviation of 31 nT at 03:23 UTC on April 23.


Space Weather Message Code: ALTK06
Serial Number: 284
Issue Time: 2012 Apr 24 0047 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Apr 24 0046 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

CME arrival soon and sunspot update

   One new region was numbered overnight; this was region 1464 which is located just to the north of region 1460, and is a BXO type group at 10 millionths in size.

    Region 1459 decayed in size from a EKC group at 250 millionths, to a DSI at 180 millionths.

Most other groups increased slightly in size.

Numerous C class solar flares took place yesterday, the largest was a C7 peaking at 1126z from region 1455 that rotated out of view 2 days ago.

This region produced a large coronal mass ejection that is not Earth directed.

A C1 solar flare from region 1462 also produced a coronal mass ejection that may have an Earthward component. The geomagnetic field is expected to be quiet to active on April 20.

The CME observed on April 18 could reach Earth on April 21, and cause  active conditions through April 22.

 An Aurora watch will be in effect for the next 72 hours.

Here you can link to some Auroral cams:

AuroraSkyStation

AlaskaCam'S

Earthcam

Large Filament lift off southeast

Update 23:30 UTC:

The filament lift off we see here on the image to the left was maybe a result of a channel eruption

Right after that filament lift off we could see a rly nice explosion (ejecta) also seen on Stereo Ahead EUVI imagery
http://stereo.gsfc.nasa.gov/browse/2012/04/19/behind_20120419_euvi_195_512.mpg

The CME looks really bright. Due to the location of the source (southwest) a direct hit will be probably unlikely. But a portion of it could strife us
 http://stereo.gsfc.nasa.gov/browse/2012/04/19/behind_20120419_cor2_512.mpg

 

Region 1455 says Good bye

We have a new 7.0 C-Class Solar flare as you can see here on the GOES X-ray Flux chart.








We can confirm the location of this event. Its around the old Region 1455 which rotated off the limb yesterday.

We noticed some ejection on SDO AIA 304 Imagery but due to the location it will probably not geo effective




   Region 1463 get official numbered and is now a  DSO type group at 40 millionths in size
All regions increased in size yesterday, region 1459 increased by 110 millions and region 1460 increased by 120 millionths
Most of interest Region 1463. It shows up  several small magnetic delta structures in the central part of the region. So a M Flare from this Region is possible