FORECAST SOL: Moderate yellow MAG: Normal green ION: Normal green
SDO solar image - 4500 angstroms - Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
radio propagation
Today's Space Weather
Sunday 31 May
last updated 30/2340 UT
Solar activity was very low on UT day 30 May. Solar activity is expected to be at low levels, with a chance of isolated M-class flares, on UT day 31 May. The solar wind is currently moderately enhanced due to minor coronal hole effects. Geomagnetic conditions in the Australian region were at quiet to unsettled levels. Global geomagnetic activity is expected to be at quiet to unsettled levels on UT day 31 May. MUFs were mostly near predicted values with mild to moderate enhancements and are expected to stay mostly at normal levels on UT day 31 May.
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 humans 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