Evening TEP is quenched by moderate to severe geomagnetic disturbances.

At the time, the large coronal mass ejections created geomagnetic disturbances on Earth.

Data's report wasn't that clear, but it sounded like an electrical or maybe even geomagnetic disturbance.

As its power climbs the scale, though, increasing geomagnetic disturbances may result.

The mission is to study distributions of ionospheric and thermospheric densities, geomagnetic disturbances, and ionospheric irregularities.

Effects on Schumann resonances have been reported following geomagnetic and ionospheric disturbances.

Eruptions on the Sun inject high-speed particles into the solar wind, and these can cause geomagnetic disturbances on reaching the Earth.

The CME hit the Earth's magnetic field in early hours of January 22, with minor geomagnetic disturbances reported.

Kp/ap Index: 'a' is an index created from the geomagnetic disturbance at one mid-latitude (40 to 50 latitude) geomagnetic observatory during a 3-hour period.

Kp and ap are the average of K and an over 13 geomagnetic observatories to represent planetary-wide geomagnetic disturbances.