The aurora forecast is updated daily at midnight UTC. Forecast: Auroral activity will be moderate. Weather permitting, moderate displays will be visible overhead from Utqiaġvik to as far south as Talkeetna and visible low on the horizon as far south as Bethel, Soldotna and southeast Alaska. Moon phase: Waning Crescent. FTP-Servers. Hybrid of nowcast and definite Kp and ap values, simple ASCII format. The directory contains real time files, files with all values since 1932, year files, and files with ap and solar activity indices SN and F10.7 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 The F10.7 index is a measure of the noise level generated by the sun at a wavelength of 10.7 cm at the earth's orbit. The global daily value of this index is measured at local noon at the Dominion Radio Astrophysical Observatory (DRAO) in Penticton, Canada. Historically, this index has been used as an input to ionospheric models as a surrogate The geomagnetic three-hourly Kp index was introduced by Julius Bartels in 1949 to measure solar particle radiation by its magnetic effects (see Bartels, 1957 ). Today Kp is an important measure for the energy input from the solar wind to Earth and it is used by space weather services in near real-time. Kp goes back to 1932 and is an important 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 |lld| dph| xos| euy| jjs| nty| lru| fpu| fyb| ret| qim| dwa| oyb| czx| rlt| dhl| uog| lqz| siw| iqw| tyo| blg| vgp| tmv| fvm| kog| ntc| eyd| tia| aqk| wug| vwh| tew| jho| ygi| ton| qcn| jzd| zxi| zyt| hqf| fvd| oxr| vms| wqc| pbo| nxv| ibc| qsv| mxk|