The aurora borealis may be visible once again in the Czech Republic this weekend.

This rare opportunity arises due to recent eruptions on the Sun, which have released plasma clouds heading partially toward Earth, according to astronomer Petr Horálek from the Institute of Physics in Opava.

The last time this breathtaking natural phenomenon was visible in Czechia was during the summer holidays earlier this year.

“There have been very strong eruptions on the Sun in the past two days,” Horálek explained. “The first eruption occurred on October 2, and the second, even stronger one, followed on Thursday. Both produced plasma clouds traveling in Earth’s direction, and especially the second one, the strongest in this solar cycle so far, is expected to cause significant auroras—most likely from Saturday to Sunday,” he added.

Although the exact timing is unpredictable, those interested in witnessing the northern lights should keep an eye on solar wind activity.

“The National Oceanic and Atmospheric Administration (NOAA) in the U.S. predicts a storm intensity classified as G3, meaning auroras could be noticeable or even visible in our region,” Horálek noted. However, weather conditions may pose a challenge.

“There’s a risk of cloud cover, but it may clear up, particularly around Karlovy Vary and Rakovník. In Slovakia, areas near the Low Tatras and the east may also offer clear views. But forecasts are still evolving,” he cautioned.

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