Sunspot alert: a risk to our power grid?

A danger to our power system?

Maurice Forgeng, EPOCH TIMES

The sun often looks calm and steady in the sky, but immense energies are seething inside it. They show themselves particularly impressively in the form of sunspots – temporary regions of intense magnetic activity. Researchers are currently observing an exceptionally large sunspot region which, because of its size and activity, is reminiscent of the Carrington Event of 1859.

At that time, a huge solar storm triggered the strongest known space weather event and had massive effects on the telegraph technology of the day. Today, however, far more sensitive systems depend on this cosmic calm – our global power grid, satellites, communication and navigation systems.

The German Aerospace Center (DLR) is following the development of the current sunspot region in real time. Several particularly active sunspots have appeared on the eastern edge of the sun, and their dimensions are exceptional. The complex consists of three regions: AR 4298, AR 4294 and AR 4296. AR 4294 stands out in particular – one of the largest sunspot regions of the current solar cycle. With an area at least ten times the size of the Earth’s entire surface and a length of 14 Earth diameters, it has the potential to trigger M-class or even X-class solar flares.

NASA confirms the exceptional size of the spot complex on the basis of images from the Solar Dynamics Observatory (SDO). The similarity to the huge sunspot region that Richard Carrington documented in 1859 is striking. Back then, an eruption reached the Earth just one day after Carrington’s observation and caused worldwide disruption. Auroras reached regions close to the equator. Telegraph lines caught fire spontaneously, devices failed or went haywire – and that in a world far less technically dependent than ours today.

The question of what a comparable event would mean in 2025 keeps experts awake. Modern technologies react very sensitively to strong geomagnetic fluctuations. Satellites could fail or malfunction, communication systems would be disrupted, GPS signals unreliable. The impact on power grids would be particularly critical. Strong geomagnetically induced currents (GIC) can overload transformers, trip protective devices and, in the worst case, cause widespread blackouts.

First considerable eruption

That the danger is real was shown by a first eruption from the active region in the early hours of Thursday, 4 December, at around 3:50 a.m. German time. The solar flare was of category M6 – considerable, but not yet dangerous. Eruptions of this strength affect the ionosphere and can cause radio interference, but do not directly endanger the energy system. For comparison: the flare energy of the Carrington Event was many times greater.

However, scientists warn that the region remains active and that stronger eruptions are possible at any time. Typically, a flare is first followed by an intense burst of X-ray and UV radiation. One to two days later, a plasma cloud, a so-called coronal mass ejection (CME), could hit or graze the Earth. This process can trigger a geomagnetic storm – the actual risk factor for infrastructure. In such cases auroras would even be visible in Europe, as most recently in May 2024.

It remains to be seen in which direction further eruptions will be ejected and how the sun’s magnetic field will be aligned. The DLR and other space weather organisations are therefore monitoring the situation continuously. The modern world is more interconnected than ever – and at the same time more vulnerable to extreme cosmic events.

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Topic: science & technology

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Solar storms remind us how fragile our high-tech world can be. The more our energy and communication systems depend on a few central structures, the more vulnerable our society becomes. Building robust, decentralised technologies – from autonomous energy sources to resilient grids – is therefore not a luxury but a prerequisite for real independence, and thus freedom.