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National Oceanic and Atmospheric Administration

Friday, December 15, 2017 02:39:15

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NOAA Scales mini

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Space Weather Conditions
24-Hour Observed Maximums
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Latest Observed
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R1-R2 --
R3-R5 --
S1 or greater --
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R1-R2 --
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S1 or greater --
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R1-R2 --
R3-R5 --
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Current Space Weather Conditions
R1 (Minor) Radio Blackout Impacts
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HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

Geomagnetic Storming began 13 Oct as Forecast

CME progress from late 12 Oct to mid-day 13 Oct
Geomagnetic Storming began 13 Oct as Forecast
published: Thursday, October 13, 2016 20:13 UTC

The expected CME arrived late on the 12 Oct UTC-day. A weak shock arrival was observed at DSCOVR (L1-point) at 12/2121 UTC (12 Oct; 5:21 pm ET) as solar wind speed, density, and total magnetic field strength increased at that time (pictured left). These are indications of a CME arrival. A sudden impulse was observed at Earth at 12/2214 UTC (12 Oct; 6:14  pm ET) as the planetary network of magnetometers measured a geomagnetic deviation simultaneously. The magnetic disturbance was also noted at the GOES satellite (pictured right) as a magnetic enhancement. As the magnetic field of the passing CME continued to strengthen; its orientation continued to be in a favorable, southward direction - allowing for better connection with Earth's magnetic field and causing geomagnetic storming to begin. Geomagnetic storming first reached G1 (Minor) levels as of  13/0815 UTC (13 Oct; 4:15 am ET). Continue to monitor geomagnetic storming updates due to this CME-related activity, by visiting our SWPC website.