Articles tagged "k index"

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Geomagnetic storms - basic terms, data, plots and graphs

A coronal mass ejection (CME) that erupted on March 15, 2013, hit Earth's magnetic field at 06:00 UTC on March 17, 2013. The solar wind speed reached 700 km/s and sparked a moderately strong G2 (Kp=6) geomagnetic storm and minor S1 solar radiation

March 18, 2013

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Geomagnetic storming levels back to normal

Geomagnetic storming reached the G2 (Moderate) level at high latitudes again early today. Bright auroras could be seen around Arctic Circle. It was sparked by one of two coronal mass ejections observed on September 2.  Solar radiation storm levels have returned to

September 06, 2012

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A coronal mass ejection (CME) hit Earth's magnetic field - K index rising, watch for auroras!!!

A coronal mass ejection (CME) hit Earth's magnetic field at approximately 2145 UTC on Nov. 28th. The impact was relatively weak and did not spark a strong geomagnetic storm yet. Kp index is at level 4.Solar

November 29, 2011

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Minor geomagnetic storming underway

Minor geomagnetic storming (G1 on the Geomagnetic Storm Scale) is underway following the arrival at Earth of 1 or more Coronal Mass Ejections that erupted from the Sun late last week and into the weekend.  Activity is not expected to strengthen much beyond current

October 06, 2011

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Earth-directed coronal mass ejection expected

A coronal mass ejection (CME) is heading toward Earth and it could deliver a glancing blow to our planet's magnetic field on Sept. 22th around 23:00 UT. There are no large coronal holes on the Earth-facing side of the sun. High-latitude sky watchers should be alert for

September 21, 2011

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Incoming coronal mass ejection

As predicted by analysts at the Goddard Space Weather Lab, a coronal mass ejection (CME) hit Earth's magnetic field at ~03:30 UT on Sept 17th. The impact was not strong. Nevertheless, the arrival of the CME could spark geomagnetic activity around the Arctic Circle.

September 17, 2011

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Geomagnetic storm in progress

UPDATE: The Geomagnetic Storm has subsided over the past few hours. However, the solar wind remains energized and occasional pulses of activity are expected for another 24 hours. Region 1283, the responsible party back at the Sun, decayed today. The Geomagnetic Storm

September 10, 2011

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Geomagnetic storm warning!

A fast-moving stream of solar wind is buffeting Earth's magnetic field. The combined effect of this stream plus a CME expected to arrive soon has prompted NOAA forecasters to declare a 30% to 35% chance of geomagnetic storms on June 23-24. High-latitude sky watchers

June 23, 2011