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基于临潼（34°22＇N，109°13＇E）对来自冲绳（26°36＇N，128°09＇E）的100kHz低频一跳天波的时延及场强的实测，并利用相应的地磁扰动等资料、进行了有关低频天波信号变化与地磁活动的关系的分析研究。结果表明：（1）当地磁扰动的日平均指数较高时，低频天波信号的时延、场强的变化也较为明显;（2）磁暴达主相的当日，低频天波信号的时延、场强大多有明显变化，并且对延、场强的变化还与低频天线反射点处于白天还是夜晚有关，若处于夜晚，天演变化较大。若处于白天，变化较小；（3）在磁暴初相时，低频天波信号的时延、场强无明显的变化；（4）低频一跳天渡时延变化值与磁暴主相最大变幅H值有较好的正相关。
Based on the measurements of the delay and field strength of a 100 kHz low-frequency one-hop sky wave from Okinawa (26 ° 36’N, 128 ° 09’E) based on Lintong’s (34 ° 22’N, 109 ° 13’E) Geomagnetic disturbance and other data, conducted a study on the relationship between low frequency sky wave signal changes and geomagnetic activity. The results show that: (1) when the daily average index of local disturbance is high, the variation of time delay and field strength of low frequency skywave signal is obvious; (2) On the day of the main phase of magnetic storm, the delay of low frequency skywave signal, Strong and more significant changes, and the delay, the field strength changes with the low-frequency antenna reflection point at day or night, if at night, sky show greater changes. (3) In the first phase of magnetic storm, the time delay and field strength of low-frequency sky-wave signal have no obvious change; (4) H values have a better positive correlation.