甚低频电磁波方法预报地磁暴

Predicting Storms by VLF Method Geomagnetic

通过观察甚低频电磁波的相位变化,预测太阳耀斑的级别.当太阳耀斑爆发时,太阳表面首先会发出大量电磁辐射（主要是X射线）,甚低频电磁波能很好地感应到此辐射;其次还喷射出大量带电低能粒子流,这会引起地磁暴,且通常在耀斑爆发1~2d之后到达地球.给出了一个预报地磁暴的实例.两事件的时间间隔约为28h,太阳风的速度约为1 484.1km/s.

The level of solar flares can be predicted by observing the VLF signal phase changes in this paper. The solar surface emits a large number of electromagnetic radiation （mainly X rays） when solar flares burst. The VLF signal can induce this electromagnetic radiation well. Then, plenty of low energy charged particle flow, which may cause the geomagnetic storms, will be sprayed as well. They will reach the earth in 1--2 d. An example of forecasting geomagnetic storms is shown. It takes 28 h from the solar flares to the geomagnetic storm occurred. The speed of the solar wind is 1 484.1 km/s.