FORECAST SOL: Normal green MAG: Moderate yellow ION: Normal green
SDO solar image - 304 angstroms - Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
radio propagation
Today's Space Weather
Wednesday 01 March
last updated 28/2328 UT
Solar activity was at very low levels during UT day 28 February. The largest observed flare, B7.7, was produced by active region 2641. Very low to low levels of solar activity are expected for the next 3 UT days. The solar wind speed was light to moderate on 1 March; during the next 24 h the speed is expected to increase and can reach strong levels due to the recurrent coronal hole effect. Geomagnetic activity was at quiet levels across the Australian region on UT day 28 February. On 1 March geomagnetic activity is expected to increase to active to minor storm levels due to the coronal hole effect. This effect may keep the geomagnetic activity enhanced during the next three UT days. MUFs were mostly near predicted monthly values during UT day 28 February. Minor to moderate MUF depressions and degradations in HF conditions are expected during the next three days.
What is Space Weather ?

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
Type II solar radio spectrograph event 17 Dec 2014
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