Because?

Here you have the same earthquake, but reported by Japan: https://www.data.jma.go.jp/multi/quake/quake_detail.html?eve...

As a European, I feel fine that American and Japanese governments report on this.

Japan has their own communication platforms for this, they're not relying on a US government site. I'm in Japan on vacation, and I got notified of the earthquake within a minute of it happening on the NERV app, which is a common disaster alerting app here.

Well you could read the japanese reports, but they'd be in japanese

The US monitors things like this because tsunami danger to the west coast is a real if remote possibility.

Japan also obviously also monitors this.

https://nerv.app/en/

This kind of data is actually shared by governments with each other as well.

Science has no borders, much less disasters.

Here you go: https://earthquake.tenki.jp/bousai/earthquake/detail/2026/04...