Downdetector -- which monitors outage complaints online -- reported more than 13,000 posts from users all over the world Saturday afternoon.
到 Down Detector 網站上看，這個服務有一部份是從 social network 上挖資料：
Downdetector collects status reports from a series of sources. Through a realtime analysis of this data, our system is able to automatically determine outages and service interruptions at a very early stage. One of the sources that we analyse are reports on Twitter.