Articles tagged "K index"

Geomagnetic storms - basic terms, data, plots and graphs

March 18, 2013

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 storm. NOAA/SWPC

Geomagnetic storming levels back to normal

September 06, 2012

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

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

November 29, 2011

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

Minor geomagnetic storming underway

October 06, 2011

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

Earth-directed coronal mass ejection expected

September 21, 2011

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

Incoming coronal mass ejection

September 17, 2011

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.

Geomagnetic storm in progress

September 10, 2011

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

Geomagnetic storm warning!

June 23, 2011

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