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 . B = 31.2e-6T * (R_E_/R)^3^
 . Pressure = Energy density = $ B^2/2\mu_0 $ = 3.8e-4 *(R_E_/R)^6^ Pa
  . 2.26nPa -> 7.5 R_E_, 4.6nPa -> 6.6 R_E_		  . B = 31.2e-6T * ($R_E$/R)^3^
 . Pressure = Energy density = $ B^2/2\mu_0 $ = 3.8e-4 *($R_E$/R)^6^ Pa
  . 2.26nPa -> 7.5 $R_E$, 4.6nPa -> 6.6 $R_E$

Space Weather

AGU Geophysical Monograph 125 2001

  • p73 - Solar wind ... - C.T. Russell

    • 400 km/s, 5 electrons and ions per cm3, 5 nT

      • KHL: mass density, 8e-21 kg/m3 ... flux, 3.3e-15 kg/m2-s ... > 1.3 nPa pressure ... > 500μW/m2 power

  • p91 - Space Weather and the Changing Sun - E.N. Parker

    • Sun core 100,000 km 100g/cm3 10e7 K

      • ten times brighter than a supernova, only 5e-12 leaks out
      • convection zone 1e-4 of power is upwards kinetic, turns into flares and solar wind

        • 0.2g/cm3 at base, 500,000km

        • 2e-7g/cm2 at surface ... temp decline 300 times, pressure decline 3e8 times

  • p143 Theory of Coronal Mass Ejections - James A. Klimchuk
    • up to 1e13kg of material, some relativistic
  • p173 Gombosi - typical 1e12kg
    • pressure from 2.25 nPa to 4.6 nPa at peak 72 hours later
  • IMF = Interplanetary Magnetic Field
  • Dst index = deviation of equatorial field, typically 100nT out of 31200nT during storm
    • up to 1000nT, 2200nT/minute

Calculations

  • B = 31.2e-6T * (R_E/R)3

  • Pressure = Energy density = B^2/2\mu_0 = 3.8e-4 *(R_E/R)6 Pa

    • 2.26nPa -> 7.5 R_E, 4.6nPa -> 6.6 R_E

SpaceWeather (last edited 2013-12-21 04:12:23 by KeithLofstrom)