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Science Keywords > EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM > GEOMAGNETIC FORECASTS

Preferred term

GEOMAGNETIC FORECASTS  

Definition

  • Forecasts of the likelihood (from 1% to 99%) that the daily geomagnetic activity level will reach a particular activity category. The four categories are Quiet to Unsettled, Active, Minor Storm, and Major to Severe Storm. The geomagnetic category assigned to a day is determined by the highest observed k-index for the day. Quiet to Unsettled = k 0 to k 3, Active = k 4, Minor Storm = k 5, and Major to Severe Storm = k 6 to k 9. Middle-latitude forecasts are verified against Fredericksburg, VA observations and High-latitude forecasts are verified against College, AK observations. Forecast lead times range from one to three days. (en)

Broader concept

Narrower concepts

Change note

  • 2013-02-18 09:50:39.0 [tbs1979] Insert Concept add narrower relation (GEOMAGNETIC FORECASTS [02290e22-24ae-40f6-96f1-0c6c76a145af,63913] - TOTAL INTENSITY [9a46a62c-952d-4253-8249-7375c14068a2,82397]);
  • 2013-02-18 09:51:24.0 [tbs1979] Insert Concept add narrower relation (GEOMAGNETIC FORECASTS [02290e22-24ae-40f6-96f1-0c6c76a145af,63913] - GEOMAGNETIC ACTIVITY [2d3d9a57-44e8-43c0-98b4-b4891c994862,82399]);
  • 2013-02-18 09:51:53.0 [tbs1979] Insert Concept add narrower relation (GEOMAGNETIC FORECASTS [02290e22-24ae-40f6-96f1-0c6c76a145af,63913] - GEOMAGNETIC STORM CATEGORY [4b7decec-e378-4824-aecf-9fe509392efd,82401]);
  • 2013-03-11 14:26:32.0 [tbs1979] update Definition (NOAA Space Weather Prediction Center); update Definition (Forecasts of the likelihood (from 1% to 99%) that the daily geomagnetic activity level will reach a particular activity category. The four categories are Quiet to Unsettled, Active, Minor Storm, and Major to Severe Storm. The geomagnetic category assigned to a day is determined by the highest observed k-index for the day. Quiet to Unsettled = k 0 to k 3, Active = k 4, Minor Storm = k 5, and Major to Severe Storm = k 6 to k 9. Middle-latitude forecasts are verified against Fredericksburg, VA observations and High-latitude forecasts are verified against College, AK observations. Forecast lead times range from one to three days.);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/02290e22-24ae-40f6-96f1-0c6c76a145af

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