FORECAST SOL: Normal green MAG: Moderate yellow ION: Moderate yellow
SDO solar image - Helioseismic and Magnetic Imager (HMI image)- Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
satellite
radio propagation
Today's Space Weather
Monday 01 March
last updated 01/0956 UT
Very low solar activity is expected today 01 March with a chance of C-class flares. The Earth entred the a High Speed Stream associated with a coronal hole. A geomagnetic storm is in progress, prolonged periods of southward directed Bz component and geomagnetic storm levels are possible in the hours ahead. Possibilities of Aurora viewing tonight from Tasmania and Southern parts of Victoria are increasing. Normal to fair HF propagation conditions are expected for today.
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
Aurora Australis as seen from the International Space Station, with the port wing of space shuttle Atlantis, and segment of a boom sensor system attached to the shuttle's robotic arm.
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