FORECAST SOL: Normal green MAG: Normal green ION: Normal green
SDO solar image - 304 angstroms - Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
satellite
radio propagation
Today's Space Weather
Friday 07 August
last updated 06/2326 UT
Very low solar flare activity is expected for today, UT day 07 August. The earth is currently under the influence of mildly elevated solar wind speed associated with coronal hole effect. The solar wind speed is expected to decline to nominal levels today. Geomagnetic conditions are expected to be mostly quiet with a chance of isolated unsettled periods. Mostly normal 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