Electrical anomaly detected nearly 22 hours before fatal Spanish train crash

A critical electrical anomaly indicating a track rupture was detected nearly 22 hours before a fatal Spanish train crash. The anomaly was recorded on January 17th, but safety systems failed to trigger alerts that could have prevented the January 18th accident, which killed 46 people. The system was not configured for automatic alerts due to perceived unreliability, and the voltage drop was not severe enough to meet the alert threshold.