BASELINE DATA. “On average, the solar wind at Earth orbit has mean density of about 4 cm−3, mean velocity of about 400 kms−1, and mean interplanetary magnetic field (IMF) magnitude of 5 nT. The average direction of the interplanetary magnetic field along the Parker spiral in the ecliptic plane is at an angle of about 45° from the radial direction.”
https://link.springer.com/article/10.12942/lrsp-2007-1