G1-Minor geomagnetic storm in progress

g1-minor-geomagnetic-storm-in-progress

A G1-Minor geomagnetic storm is in progress as a result of coronal hole high speed stream (CH HSS) buffeting Earth's magnetic field.

Effects from the CH HSS are expected to continue disrupting the solar wind environment for the rest of the July 13.

By July 14, nominal conditions are expected to return as the CH HSS influence wanes.

Image credit: NOAA/SWPC.

The geomagnetic field is expected to be at quiet to unsettled levels through July 14. 

Quiet conditions are expected on July 15 as CH HSS effects diminish.

Image credit: NOAA/SWPC.

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Space Weather Message Code: ALTK05
Serial Number: 805
Issue Time: 2015 Jul 13 0741 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2015 Jul 13 0741 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 – Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales

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.

***

Featured image: Probability of visible aurora on July 13, 2015 at 08:00 UTC. Credit: NOAA/SWPC.

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