OK, something is odd then. I'm sending a screenshot from Turnilo (let me know if it doesn't come through).

In Turnilo it goes to almost zero for ig.wikipedia. Other prominent languages in Nigeria are English and Hausa, and they also go somewhat down in the same period, but not nearly so sharply.

How can there be such a difference between unique devices and pageviews?

Also, if I try to look at unique_devices_per_domain_daily on Turnilo, I don't get any data after September 24 2017.

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Amir Elisha Aharoni · אָמִיר אֱלִישָׁע אַהֲרוֹנִי
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I want to live in peace.” – T. Moore‬

2018-06-21 10:09 GMT+03:00 Federico Leva (Nemo) <nemowiki@gmail.com>:

I see the baseline is less than 200k monthly unique devices and there were no huge drops:
https://analytics.wikimedia.org/dashboards/vital-signs/#projects=igwiki/metrics=MonthlyUniqueDevices

Absent trivial errors, such misclassifications of entire countries have been caused in the past by ISP changes. (I think the biggest case was Australia at some point, it was in Erik Zachte's blog.) Things like moving large IP ranges or slices of traffic from one operator to another. If I remember correctly, some big internet exchanges have been built recently in Central Africa, which may have prompted changes.

I'm not sure at what rate the GeoIP information is updated.

Federico

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