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Geomagnetic storm update - 13th November 2023

What Has Happened?

Solar wind data showing the CME arrival at the DSCOVR satellite on the 12th of November (Data: NOAA DSCOVR).

A video showing a full-halo CME observed on 9th November 2023. Imagery provided by by SOHO/LASCO.

 

The Coronal Mass Ejection (CME) that lifted off the Sun on 9th November arrived at the Earth's magnetosphere at 5:30 UT on 12th November with activity reaching STORM G1 levels. See NOAA space weather scales for more details about these storm levels.

Although solar wind speeds were elevated, activity was limited due to the interplanetary magnetic field (IMF) strength being relatively weak initially and then later on orientated northwards, a configuration that limits increased geomagnetic activity.

 

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Glossary

BGS
The British Geological Survey is a geoscience research centre that is part of UK Research and Innovation (UKRI) and affiliated to the Natural Environment Research Council (NERC).

CME or Coronal Mass Ejection
The eruption of a portion of the outer atmosphere of the Sun into space, caused by rapid changes in its magnetic field. Often occurs along with a solar flare.

Solar Wind
The ever-present expansion of the Sun’s hot outer atmosphere into the solar system, which carries space weather within it.

Interplanetary magnetic field (IMF)
The magnetic field carried with the solar wind.