Ionosphere storms typically occur after a solar eruption in what time frame?

Ionosphere storms typically occur after a solar eruption in what time frame?

• A. 0-6 hours
• B. 6-12 hours
• C. 12-18 hours
• D. 24-36 hours

Answer: (C)

Sun eruptions send energy toward Earth that eventually couples with the magnetosphere and drives ionospheric disturbances. The onset of large ionospheric storms, driven by this geomagnetic activity, typically appears about 12–18 hours after the eruption as the CME arrives and the magnetosphere–ionosphere system responds. Immediate effects in the D layer from solar X-ray flares occur far sooner (minutes to hours) and are not the same as the larger ionospheric storm. Delays of 24–36 hours are possible in some cases, but the common onset window used in practice is 12–18 hours after the eruption.

Sun eruptions send energy toward Earth that eventually couples with the magnetosphere and drives ionospheric disturbances. The onset of large ionospheric storms, driven by this geomagnetic activity, typically appears about 12–18 hours after the eruption as the CME arrives and the magnetosphere–ionosphere system responds. Immediate effects in the D layer from solar X-ray flares occur far sooner (minutes to hours) and are not the same as the larger ionospheric storm. Delays of 24–36 hours are possible in some cases, but the common onset window used in practice is 12–18 hours after the eruption.