Ionospheric storm (English spelling)

Japanese: 電離圏あらし(電離圏嵐) - でんりけんあらし（英語表記）ionospheric storm

Solar cosmic rays (mainly high-energy protons) and high-speed plasma flows (solar wind) emitted in conjunction with a solar flare reach the Earth on average several hours later and one to two days later, respectively, causing severe disturbances in the ionosphere for several days on a global scale, including the polar regions. Ionospheric storms disrupt various wireless communications that use radio waves propagated through the ionosphere. The abnormal radiation of electromagnetic waves accompanying a solar flare immediately causes a sudden ionospheric disturbance (the Dellinger phenomenon), but the abnormal radiation of particles causes disturbances on Earth later than the electromagnetic waves.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

太陽のフレアにともなって放射される太陽宇宙線(おもに高エネルギーの陽子)および高速プラズマ流(太陽風)が，それぞれ平均数時間後および1～2日後に地球に到達し，極域をはじめ世界的規模で電離圏を数日間にわたって激しく乱す現象をいう。電離圏あらしによって電離層伝搬の電波を利用している種々の無線通信が障害を受ける。太陽フレアにともなう電磁波の異常放射は直後に急始電離圏じょう乱(デリンジャー現象)を起こすが，粒子の異常放射は電磁波より遅れて地球にじょう乱を起こす。

出典　株式会社平凡社世界大百科事典第２版について　情報

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