Total solar eclipse caused significant internet traffic drops across Europe

Data from Cloudflare shows that internet usage across Iceland, Spain, and Portugal declined by up to 46.7% during the August 12, 2026, total solar eclipse.

Image: Cloudflare Blog

The total solar eclipse that swept across Europe on August 12, 2026, caused a measurable shift in digital behavior as millions of people stepped away from their devices to observe the event. Cloudflare Radar data indicates that HTTP request volumes in affected regions fell into a distinct trough that aligned precisely with the moment of maximum solar obscuration. This decline was most pronounced in countries situated along the path of totality, including Iceland, Spain, and Portugal.

Researchers compared HTTP request volumes in five-minute increments against a baseline established by the median traffic of the three preceding Wednesdays. The data reveals that as the moon moved to cover the sun, internet activity decreased significantly, with traffic drops ranging from 9.3% to 46.7% in impacted areas. The correlation between the physical event and digital activity was consistent, with traffic rebounding to normal levels within minutes of the sun reappearing.

The severity of the traffic dip was directly tied to the degree of solar coverage. Regions experiencing a deep partial eclipse or totality saw the most significant declines, while areas where the sun was only slightly obscured, such as Poland and Denmark, recorded minimal changes in online activity. In some northern regions like Norway and Sweden, traffic actually saw slight increases above the established baseline during the event.

The findings highlight how large-scale physical events can temporarily reshape digital patterns. Rather than resulting from network failures or infrastructure issues, the observed slowdowns were a direct reflection of human attention shifting from screens to the sky. The data provides a clear snapshot of how communal participation in a natural phenomenon can momentarily realign internet usage across an entire continent.

Sources

  1. Cloudflare BlogTotal eclipse of the Internet: traffic impacts in Iceland, Spain, and Portugal
  2. DPReviewThese photographers understood the assignment at Spain’s total solar eclipse