alienation news

Variance Deviations on September 11

The most striking departures of the GCP data from expectation on September 11 were in the variance measure, that is, the second-by-second internode variation. Beginning at about 4 or 5 in the morning, New York time, the variance showed a persistent, slight increase, that continued until about 11:00. It then became slightly smaller than expectation and again, maintained the tendency for several hours, until about 18:00. The following figures show the cumulative deviation of the variance from its mean value for one day, the 11th, and then the same measure in a larger context of three days and 12 days. The first represents the formal, scientific view, but the second and third figures, although they show the actual data, emphasize an aesthetic perspective, and give a thought provoking, broader context.