Exempel på auroral

• We witnessed major auroral activity.

• An auroral footprint is created by a river of electric current flowing between Jupiter and its volcanic moon, Io.

• A violent solar flare causes a much wider auroral ring that can sometimes be seen as far as the equator.

• Dynamics of auroral belt and polar geomagnetic disturbances.

• During magnetospheric disturbed conditions, this conductivity enhancement becomes much larger, and the auroral regions move equatorward.

• Secondly, the horizontal electric field in the auroral ionosphere is also larger than that at lower latitudes.

• Growth of the auroral region to the north was by addition of new lines developing from west to east.

• The high-level auroral activity may lead to formation of complex hydrocarbon molecules that are carried toward the equator.

• Ground stations to be used to study effects on radio astronomy and radar probing as well as auroral measurements.

• First of all, the conductivity of the auroral ionosphere is generally larger than that at lower latitudes.

• Therefore, when using an auroral event as a radio signal reflector, the reflected signal strength and signal intelligibility decreases with increasing transmitting frequency.

• Radiation received also varies with geographical location (polar, auroral zones, mid-latitudes, and equatorial regions).

• The return current region is where electrons move upward from the ionosphere to close the auroral current circuit.

• Observations included meteorology, geomagnetism, auroral phenomena, ocean currents, tides, structure and motion of ice and atmospheric electricity.

• Such vortices can be seen in aurora as auroral curls.

• An auroral electrojet index (measured in nanotesla) is regularly derived from ground data and serves as a general measure of auroral activity.

• Electric currents originating in such way apparently give auroral electrons their energy.

• His research interests include plasma electrodynamics, with application to space and astrophysical plasmas, especially in the context of auroral and magnetospheric physics.