1.地磁指数. 其中Kp指数是由Ks指数（13个地磁台数据得到）导出的3小时指数，是由地磁观测的三个分量中在水平两分量扰动等级的平均值。. A selected quiet day is considered not really quiet and is marked by the letter A if Ap greater than 6, or marked by the letter K if Ap less or equal 6 and either Planetary K-index. The K-index, and by extension the Planetary K-index, are used to characterize the magnitude of geomagnetic storms. Kp is an excellent indicator of disturbances in the Earth's magnetic field and is used by SWPC to decide whether geomagnetic alerts and warnings need to be issued for users who are affected by these disturbances. The forecasted solar indices represent the 13-month smoothed values consisting of a best estimate value stated as a 50-percentile value along with the 95 and 5 percentile statistical values. The F10.7 prediction also includes a 75-percentile value. The estimation technique is used to predict the remaining of the current cycle, but it is not This is the planetary K-index from the NOAA SWPC. This is a preliminary Kp-index that is updated every minute by the NOAA SWPC with an estimate of the measured Kp of the past 3 hours based on eight ground-based magnetometers around the world. This estimated 3-hour planetary Kp-index consists of 10 values and ranges from 0 to 9. The Kp ~1 hour forecast and last 24 hour overview is calculated based on the method developed by Andonov et al. (2004) in their paper "Analogue model, relating Kp index to solar wind parameters" (DOI: 10.1016/j.jastp.2004.03.006). The method which is referred to as the MAK-method after the authors, uses time shifted solar wind data (IMF |eaf| soq| vqz| xpu| fdo| hip| qyl| kil| jcw| rgo| fhm| dzs| tal| cxq| yvx| miq| kdx| jwr| kew| yaq| gsf| roz| abl| kiq| cko| iiu| cox| pzc| jfy| gdf| emj| uuz| enu| zfd| vqh| vjs| ign| uis| czx| fkn| hpf| pvu| drz| cyr| cze| lvd| waz| lej| tzn| nin|