{"HAPI":"3.3.1","status":{"code":1200,"message":"OK"},"startDate":"1932-01-01T00:00:00Z","stopDate":"2026-09-14T19:00:00Z","cadence":"P1M","timeStampLocation":"begin","modificationDate":"2026-09-14T10:35:02Z","title":"International Quiet and Disturbed Days (Best Available, monthly)","description":"The ten international quietest days (Q1-Q10, quietest first) and the five international most disturbed days (D1-D5, most disturbed first) of each UT month, given as day-of-month (1-31). Selected from the planetary Kp index (introduced by Bartels, 1949, and endorsed by IAGA; based on K-values recorded at 13 geomagnetic observatories); produced by GFZ Potsdam, redistributed by WDC for Geomagnetism, Kyoto. Best Available version: highest processing level per period (currently definitive only). One record per month; the timestamp marks the first instant of the month (timeStampLocation=begin).","resourceID":"doi:10.5880/Kp.0001","datasetCitation":"Matzka, J., Stolle, C., Yamazaki, Y., Bronkalla, O., & Morschhauser, A. (2021). The Geomagnetic Kp Index and Derived Indices of Geomagnetic Activity. Space Weather, 19, e2020SW002641. doi:10.1029/2020SW002641. Kp index data: Matzka, J., Bronkalla, O., Tornow, K., Elger, K., & Stolle, C. (2021), Geomagnetic Kp index, V. 1.0, GFZ Data Services, doi:10.5880/Kp.0001. Redistributed via WDC for Geomagnetism, Kyoto.","licenseURL":"https://creativecommons.org/licenses/by/4.0/","parameters":[{"name":"Time","type":"isotime","units":"UTC","fill":null,"length":24,"label":"Time"},{"name":"quietDay1","type":"integer","units":null,"fill":"0","label":"Q1","description":"Quietest day of the UT month (day-of-month)."},{"name":"quietDay2","type":"integer","units":null,"fill":"0","label":"Q2","description":"2nd quietest day of the UT month (day-of-month)."},{"name":"quietDay3","type":"integer","units":null,"fill":"0","label":"Q3","description":"3rd quietest day of the UT month (day-of-month)."},{"name":"quietDay4","type":"integer","units":null,"fill":"0","label":"Q4","description":"4th quietest day of the UT month (day-of-month)."},{"name":"quietDay5","type":"integer","units":null,"fill":"0","label":"Q5","description":"5th quietest day of the UT month (day-of-month)."},{"name":"quietDay6","type":"integer","units":null,"fill":"0","label":"Q6","description":"6th quietest day of the UT month (day-of-month)."},{"name":"quietDay7","type":"integer","units":null,"fill":"0","label":"Q7","description":"7th quietest day of the UT month (day-of-month)."},{"name":"quietDay8","type":"integer","units":null,"fill":"0","label":"Q8","description":"8th quietest day of the UT month (day-of-month)."},{"name":"quietDay9","type":"integer","units":null,"fill":"0","label":"Q9","description":"9th quietest day of the UT month (day-of-month)."},{"name":"quietDay10","type":"integer","units":null,"fill":"0","label":"Q10","description":"10th quietest day of the UT month (day-of-month)."},{"name":"disturbedDay1","type":"integer","units":null,"fill":"0","label":"D1","description":"Most disturbed day of the UT month (day-of-month)."},{"name":"disturbedDay2","type":"integer","units":null,"fill":"0","label":"D2","description":"2nd most disturbed day of the UT month (day-of-month)."},{"name":"disturbedDay3","type":"integer","units":null,"fill":"0","label":"D3","description":"3rd most disturbed day of the UT month (day-of-month)."},{"name":"disturbedDay4","type":"integer","units":null,"fill":"0","label":"D4","description":"4th most disturbed day of the UT month (day-of-month)."},{"name":"disturbedDay5","type":"integer","units":null,"fill":"0","label":"D5","description":"5th most disturbed day of the UT month (day-of-month)."},{"name":"versionCode","type":"integer","units":null,"fill":null,"label":"Version Code","description":"Processing status code Mm (major*10+minor). Currently a single definitive version (versionCode 20)."}]}