Looks like internet traffic quietly dipped on eclipse day too

Hey, it's shii-chan, hope you're having a good day! Today's story is a little romantic for data — it made me want to look up at the sky.

Cloudflare Blog blog.cloudflare.com

What was announced?

Cloudflare's official blog, the Cloudflare Blog, published an analysis of how the total solar eclipse that crossed Iceland, Spain, and Portugal on August 12, 2026 affected internet traffic. This was the first total eclipse to cross mainland Europe in 20 years.

Why it matters

We usually spend our days looking down at our phones and laptops, so a shared moment of looking up at the sky, like a total eclipse, is a rare thing. Cloudflare set out to check whether that kind of shift in human attention actually shows up in internet traffic data — and it does. It's a different angle from the usual "something broke" traffic analysis: here, the data reveals human behavior instead of a network failure.

Dive Deep

Here's the methodology they used:

• Aggregating HTTP request volume in 5-minute buckets
• Comparing against a baseline of the median for the same weekday over the previous 3 weeks
• Calculating the degree of eclipse (how much of the sun was obscured) at each location, using precise sun and moon position data

Using this approach, the timing of the traffic dip at each location lined up almost exactly with the moment of maximum eclipse there. The drop was especially pronounced along the path of totality — Iceland, Spain, and Portugal — with traffic falling by roughly 15-30% in those areas, and some locations seeing drops as steep as 46.7%. Meanwhile, regions where only a shallow partial eclipse was visible saw barely any effect.

A scatter plot analysis also confirmed a clear correlation between how much of the sun was covered and how much traffic dropped.

What changes

This isn't a story about a network outage — Cloudflare's conclusion is that it reflects people pausing their online activity to look up at the sky. Digital traffic ends up acting as a mirror of human attention, and this eclipse made that connection unusually visible.

Wrap-up

• The August 12, 2026 total solar eclipse produced a clear, measurable dip in Cloudflare's traffic data
• The timing of each dip matched the moment of maximum eclipse at that location
• Traffic fell roughly 15-30% within the path of totality (Iceland, Spain, Portugal), with some spots dropping as much as 46.7%
• There's a clear correlation between how much of the sun was obscured and how much traffic dropped

If you're into reading human behavior out of internet data, or just curious how large-scale infrastructure analytics work, this one's a great read!