Solar wind today, October 22, 2026
Solar wind speed and density in real time, with IMF Bz data and recent charts from NOAA SWPC.
Speed
Elevated
Density
Normal
IMF Bz
Southward
Speed and density — last 2 hours
Interplanetary magnetic field (Bz) — last 2 hours
Negative Bz makes it easier for solar wind energy to enter Earth's magnetosphere. Values below -5 nT increase geomagnetic storm potential.
Solar wind speed scale (km/s)
Slow solar wind with generally calm conditions.
Typical solar wind speed.
May contribute to mild geomagnetic activity.
Higher chance of noticeable disturbances.
Can contribute to stronger magnetic storms.
Very fast flow with high disturbance potential.
What is solar wind and why is it important?
Solar wind is a continuous stream of charged particles flowing from the Sun. Its speed, density and magnetic field determine how strongly it can interact with Earth's magnetosphere.
A rapid increase in solar wind speed or a sustained southward Bz can raise the risk of geomagnetic storms. This page shows recent data in a practical format.
FAQ
What is solar wind?▾
Solar wind is a flow of charged particles coming from the Sun.
Why does speed matter?▾
Higher speed means stronger pressure on Earth's magnetosphere.
What is density?▾
Density shows how many particles are present in a given volume of solar wind.
What does Bz mean?▾
Bz is the vertical component of the interplanetary magnetic field. Negative values increase storm potential.
How often is data updated?▾
Data comes from NOAA measurements and is refreshed regularly.