The present invention extends to methods, systems, and computer program products for detecting major events. A sequence of normalized signals is accessed. An event is detected at a location based on the signal sequence. An interested party is notified of the event detection. The detected event is compared to (historical and/or current) major event data associated with the location. It is determined that the detected event is anomaly at the location in view of results of the comparison. The event is classified as a major event based on the detected event being an anomaly. Subsequent events outside a buffer around the major event can be identified as human ripple effects.
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