Best viewed with window expanded
A Coronal Mass Ejection (CME) swept past Earth on Tuesday afternoon. The ACE Spacecraft detected an interplanetary shock at 19:58 UTC. A geomagnetic sudden impulse measuring 25nT was detected at 20:49 UTC. This signaled the passage of the IP shock past our planet. The initial impact was weak, however a south tilting solar wind / Bz component aided in raising geomagnetic activity.
Interplanetary Mag. Field
Btotal: 10.7 nT
Bz: 9.4 nT south
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 5 storm
Bz South: The Bz component of the interplanetary magnetic field (IMF) tipped south (-10 nT) for a long duration. A minor G1 Level Geomagnetic Storm resulted at high latitudes.
Despite its unstable magnetic field, big sunspot AR1785 has resisted exploding.
Sunspot
Despite its unstable magnetic field, big sunspot AR1785 has resisted exploding.
1785 has Beta-Gamma-Delta configuration
Both Sunspots 1785 and 1787 will remain the regions of focus today, with 1785 being the biggest threat for a moderate solar flare (NOAA estimates 55% probability).
Due to return within the next couple of days
1775 S26
Aurora over Alberta, Canada - Mike Isaak
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2013 Jul 10 0257 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Links to visit
No comments:
Post a Comment