JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


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Ominous space-weather: A mild Solar CME caused a bigger geomagnetic storm on Earth than anyone expected

This week a mild Coronal Mass Ejection off the sun blasted past Earth. It was only a mild CME with solar winds at 500km per second, which is a medium kind of speed. The experts were all predicting a G1 class Geomagnetic storm, and were a bit astonished when we got much bigger G3 storm instead. (NOAA’s G scale runs from G1 up to G5).

This occurred near the minimum weak point of the solar cycle, and we’re going to get much bigger blasts as Cycle 25 ramps up. But if mild CMEs can rattle the Earth’s magnetic field this much, things might get much more exciting when moderate or strong CME’s shake the cage. Satellites and networks could be in trouble. “Grid’s Away”…

Is Earths magnetic field weaker or more vulnerable than we thought? How could we miss that?

As Cap Allon of Electroverse said:

“Nobody saw the KP Index hitting 7.

…when I say nobody, I mean nobody predicted this: not NASA, NOAA, ESA or IPS in Australia.”

It was not dense, and the filament released was hardly cause for concern.

“There is absolutely nothing in the history of […]

Extreme solar storms hit Earth in 774 and 993AD — What would happen if one hit now?

August 31, 201. This coronal mass ejection just missed Earth, according to NASA

There were two mysterious sudden spikes in carbon 14 in tree rings around a thousand years ago. Now some researchers at Lund University say they’ve matched those to beryllium layers in ice cores from the Arctic and Antarctic. Some wild event made these changes across continents all over the world at the same time, and about the only thing that could have done that was a massive solar storm (or two). There are estimates these extreme storms would have been ten times stronger than the biggest solar storms we have had in the last few decades. The two big bad storms are described as a few times bigger than even the largest solar storm in modern history, which was The Carrington Event in 1859. The radioactive spikes specifically show up in tree rings in 774/775AD and 993/994AD. It’s pretty cool that we can pin those years down so accurately, and as an aside, I imagine it makes a fairly handy calibration point for tree ring researchers now that we know it was global.

Unfortunately, if one of those happened now, it would not be fun. The […]