FORECAST SOL: Normal green MAG: Normal green ION: Normal green
SDO solar image - 171 angstroms - Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
satellite
radio propagation
Today's Space Weather
Monday 11 December
last updated 10/2334 UT
Solar activity stayed at very low levels over the last 24 hours. Very low levels of solar activity may be expected from 11 to 13 December. Geomagnetic activity stayed at quiet levels today (UT day 10 December) across the Australian/NZ regions. Some unsettled periods may be observed on 11 December. Geomagnetic activity may rise to active levels on 12 and 13 December. Minor to mild MUF depressions were observed today (UT day 10 December). Spread F and Sporadic E blanketing were observed at several low and mid latitude locations. Minor to moderate MUF depressions and degradations in HF conditions are possible from 11 to 13 December.
What is Space Weather ?

Impacts on Critical Infrastructure.

Space weather refers to changes in the space environment, particularly the region between the Earth and Sun. The "solar wind" from the Sun stream past the Earth and is mostly deflected by the Earth's magnetic field, but variations in the solar wind cause changes in the Earth's magnetic field.

solar prominence

Occasionally, a huge release of magnetic energy, called a solar flare, occurs on the Sun. Flares can produce large quantities of x-rays which affect the Earth's atmosphere. They can also accelerate atomic particles (mostly protons) to very high speeds (a substantial fraction of the speed of light!). These high energy particles are dangerous to man and can reach the stratosphere where jetliners fly.

Most aspects of space weather affect us to some extent. The more our society becomes dependent on technology and the more we utilise space, the more we are affected by space weather. Some aspects of space weather are benevolent, and allow activities not otherwise possible such as long range radio communications. Some aspects are benign but fascinating such as the Aurora, and some are malevolent. Like terrestrial weather, it sometimes depends on the situation and the event.

The image below is an artists impression of the solar wind interacting with the Earth's magnetic field.

Solar wind
Collage of images - Power lines, Learmonth Observatory, pipeline, Magnetometer measurements , Aurora at Casey, an Ionogram, and Satellite.
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