2026-09-16T18:00:00Z 0.67 2026-09-16T15:00:00Z 1.00 2026-09-16T12:00:00Z 2.33 2026-09-16T09:00:00Z 1.67 2026-09-16T06:00:00Z 2.33 2026-09-16T03:00:00Z 3.00 2026-09-16T00:00:00Z 3.67 2026-09-15T21:00:00Z 3.33 # type: reference-data # source: NOAA Space Weather Prediction Center # as-of: 2026-09-16T18:00:00Z # format: start of 3-hour interval, Kp # latest-scale: below storm level # note: newest first; the most recent values are preliminary # license: https://www.weather.gov/disclaimer