Total Solar Eclipse Causes Noticeable Dips in Internet Traffic Across Europe
Cloudflare observed significant reductions in internet traffic in Iceland, Spain, and Portugal during the August 12th total solar eclipse, directly correlating with moments of maximum solar obscuration.
On August 12th, a total solar eclipse traversed across Europe, captivating audiences in Iceland, northern Spain, and Portugal. This celestial event, the first total solar eclipse to cross mainland Europe in two decades, drew millions outdoors to witness the spectacle. As observed during previous large-scale events like the 2026 World Cup and the 2024 solar eclipse, major natural or public phenomena can demonstrably influence online behavior. Cloudflare leveraged its Radar service to analyze internet traffic data, revealing a clear correlation between the eclipse's path and shifts in digital activity.
The analysis focused on HTTP request volumes, comparing traffic on eclipse day against a baseline of normal activity for the same weekday. By measuring traffic in five-minute intervals and marking the precise moment of maximum solar obscuration with black diamonds, researchers could visually align traffic decreases with the eclipse's peak. The data showed a striking pattern: as the moon increasingly obscured the sun, internet traffic dipped significantly, particularly in regions directly under the path of totality or experiencing deep partial eclipses, such as Iceland, Ireland, the UK, France, Spain, and Portugal.
In these heavily impacted areas, the traffic reduction was most pronounced, with HTTP request volumes falling by approximately 15% to 30%. This dip was not uniform; countries experiencing only a shallow partial eclipse, like Sweden and Denmark, saw minimal or no traffic decrease. The data suggests that as the eclipse reached its zenith, users paused their online activities to observe the event, leading to a measurable decline in internet traffic. As the sun reappeared, traffic levels quickly rebounded, often within minutes of maximum coverage, as people returned to their devices.
A scatter plot further reinforced this correlation, plotting peak solar obscuration against the observed traffic dip for individual countries. The clear downward trend indicated that higher levels of solar obscuration corresponded with greater reductions in internet traffic. While local factors such as population density, time of day, and cloud cover contributed to some variability, the overall trend strongly pointed to the eclipse itself as the primary driver of the observed traffic changes.
Iceland, Spain, and Portugal experienced the most dramatic traffic decreases, with some regions seeing changes as steep as -46.7%. The methodology involved calculating precise sun and moon positions to determine obscuration levels and comparing eclipse day traffic against the median of the three preceding Wednesdays to establish a reliable baseline. This rigorous comparison ensured that the observed traffic shifts were attributable to the eclipse rather than typical weekly fluctuations.
The findings underscore the profound connection between physical events and digital behavior. While network performance remained stable, the data from Cloudflare Radar illustrates how a shared, large-scale natural phenomenon can temporarily reshape online engagement across entire regions. The temporary slowdown in internet activity was not a technical failure but a direct reflection of human attention being drawn away from screens and towards the sky.
This event serves as a compelling reminder that internet traffic is intrinsically linked to human activity and attention. As the moon passed between the Earth and the sun, the digital world experienced a noticeable pause. The rapid normalization of network patterns post-eclipse provided a fascinating snapshot of how cosmic events can momentarily influence our collective digital lives, highlighting the dynamic interplay between the physical and virtual realms.
Cloudflare Radar continues to offer insights into how major worldwide events impact internet activity. Users can explore these trends and track internet traffic patterns through Cloudflare Radar's interactive tools and social media channels, providing a valuable resource for understanding the real-time effects of global occurrences on the digital landscape.