On August 12, the moon passes over the sun and parts of Europe go dark for over two minutes. Iceland sees its first total solar eclipse since 1954 — a rarity that won’t return until 2196.
On August 12, the moon’s shadow will sweep across Europe in a narrow path, while a partial solar eclipse will be visible elsewhere in the world. The event begins around midday in Russia and moves via the Arctic Ocean toward Greenland, where the eclipse reaches its peak. Within the zone of totality, full coverage lasts 2 minutes and 18 seconds, and in Reykjavik the moment falls around 5:48 PM local time. For anyone hoping to watch, it’s crucial to use special eclipse glasses or filters, since looking directly at the sun unprotected can cause permanent eye damage.
What is a solar eclipse?
A solar eclipse occurs when the sun, moon, and Earth align exactly, causing the moon to fully or partially block sunlight. Worldwide, up to 7 eclipses can occur per year, though not all of these are solar eclipses and total coverage is exceptional. That maximum primarily reflects geometry: there are several “opportunities” each year, but they rarely align favorably for densely populated areas.
Where an eclipse can be seen depends on the narrow path the moon’s umbra traces across the Earth’s surface. Outside that strip, only the penumbra remains, resulting in a partial eclipse. On August 12, that partial version, according to calculations, will fall across roughly 25 percent of the planet — considerably larger than the area where it actually gets dark.
Details of the August 12 eclipse
After passing toward Greenland, the shadow moves just south of the North Pole before reaching northeastern Greenland shortly after 4:00 PM local time. From there, the shadow follows Greenland’s east coast at a speed of more than 3,400 kilometers per hour (roughly 2,100 mph). That high speed is normal for eclipses: the moon’s shadow is small and gets “swept” across the globe by Earth’s rotation and the moon’s orbital motion.
For those standing in Reykjavik, the difference comes down to details: there, totality doesn’t last 2 minutes and 18 seconds, but just over 1 minute. That’s because the Icelandic capital isn’t at the center of the totality path but closer to its edge. The timing stays the same, but the duration shrinks the farther you are from the center of the shadow band.
Totality doesn’t end over the ocean: the path reaches land in northern Spain just before 8:30 PM local time. Along the way, the umbra “grazes” the northeastern corner of Portugal and then crosses the Balearic Islands, just before sunset and the end of the eclipse. For observers in southwestern Europe, that means little margin, since the final stretch plays out with the sun already low on the horizon.
Watching safely: protect your eyes
Those watching from the partial zone won’t see the sun’s corona and will typically notice a smaller drop in ambient light and temperature than those in the totality band. Precisely because things “don’t seem all that dark,” there’s a risk: people are more likely to keep looking at a sun that’s still partly bright. Protection, therefore, remains important, even when the sun is only partly obscured.
If you don’t have eclipse glasses or a solar filter, there are safe alternatives that don’t involve looking directly at the sun. A classic method is the pinhole principle: a small hole projects an image of the sun onto a sheet of paper or the ground, making the moon’s “bite” out of the sun visible without any eye risk. Natural shadow projections work too — for instance, when sunlight filters through leaves and forms dozens of small projections on the ground.
The practical guidance circulating around this eclipse has also been compiled by New Scientist. Guides like these hammer home one point: ordinary sunglasses are not a substitute for real eclipse glasses or approved solar filters. The distinction is technical but essential: sunglasses merely dim light, while filters block harmful radiation sufficiently.
Historical and future context
The fact that totality in Iceland is so rare comes down to the exact angle at which the moon casts its shadow. On August 12, that narrow strip crosses Iceland for the first time since 1954, and won’t return until 2196. So this isn’t some special quality of Iceland’s skies — it’s a rare overlap of orbital paths and Earth’s rotation.
Even within Europe, the distribution is uneven: the umbra touches only a handful of places, while the partial eclipse fans out much more widely. That explains why eclipse trips often end up in sparsely populated regions, such as parts of Greenland, where the shadow passes early in its route. An added complication is logistics: those hoping to watch from there often face hard-to-reach locations and unpredictable weather.
According to New Scientist, Iceland is especially interesting because the shadow will be visible there from more densely populated areas: “it will then reach Iceland, where the eclipse will be visible from more densely populated areas.” That marks an important difference from earlier stretches of the path, where totality mostly passes over small settlements and research stations. For observers, that’s the difference between an expedition and a (relatively) ordinary trip.
What happens next?
Total eclipses aren’t just a spectacle — they’re also a window into the sun’s corona, a region that’s hard to observe outside of totality. Researchers use these moments to study the corona and investigate questions about its temperature, structure, and dynamics. That’s precisely why totality, however brief, is scientifically more valuable than a partial eclipse.
For those planning further ahead: later this year, on October 25, another partial solar eclipse is scheduled. It seems likely that Dutch observatories and astronomy clubs will firm up their public viewing events around August 12 in the coming weeks, especially now that it’s confirmed the umbra will also touch European soil. Which spots in Europe will end up being the busiest: the relatively accessible edges in Spain and Portugal, or Reykjavik, where totality is shorter but logistics are simpler?
