Update for the week to September 23rd
The current 5 day trailing average is on 4,814,000km2 while the 1 day extent is at 4,839,000km2.
(All the following data is based on a trailing 5 day average)
The daily anomaly (compared to 81-10) is at -1,589,000km2, a decrease from -1,625,000km2 last week. The anomaly compared to the 07, 11 and 12 average is at +683,000km2, an increase from +638,000km2 last week. We're currently 8th lowest on record, down from 7th lowest last week.
The average daily change over the last 7 days was +22.2k/day, compared to the long term average of +17.6k/day, and the 07, 11 and 12 average of +16.3k/day.
The average long term change over the next week is +43.7k/day, with the 07, 11, and 12 average being +29.9k/day.
The extent change so far this September is the 20th least negative on record. To achieve the largest growth, an increase of at least 123.0k/day is required (more than 167.2k/day with single day values), while the largest loss requires a drop of at least 30.6k/day (drop of at least -47.7k/day with single day values) and an average change requires an increase of 40.8k/day (52.2k/day with single day values).
The 5 day average value of 4,635,000km2 from the 13th is likely to be the minimum for the year.
This is the 8th lowest on record.