To Predict HF Communication Interruption Events Using VLF Method

When a solar flare bursts, the sun radiates a mass of X-rays and high energy particles. X-rays arrive at the earth in the velocity of light, cause the sudden ionosphere disturbance(SID) event. The solar flare makes the VLF phase advance, brings the fall of short wave(HF) communication quality, even interrupts the HF communication. This paper gives the feasibility of predicting the HF communication interruption using VLF and the predicting method. The users may adopt preventions to improve the HF communication quality.