Anomalies
An is a measurement well outside its own usual range: a spike in reporting, a source gone quiet, ships or aircraft behaving unusually. Each one is a prompt to look, not a conclusion.
How anomalies are found
Reporting spikes: a person, place or topic named in more than three times its usual daily reports over the last 30 days (at least 4 reports; subjects under a week old are left out).
Sources gone quiet: an outlet that averages 5 or more items a day over two weeks publishes nothing for 24 hours although Mosaic could reach it.
Ships stopped transmitting: covers six strategic straits; a ship must have been under way and recently active, and the alert is held back when a receiver gap across the zone is likely.
Unusual air traffic: tracked aircraft activity in a zone compared with its 30-day usual level.
Reporting and sensors together: a sensor change and a reporting change in the same zone within 24 hours.
The history behind each comparison qualifies every card: a deviation is shown in the strongest tone only when it rests on an established usual level. Market-price and situation-break checks are planned, not live.