Nonlinear Processes in Geophysics www.nonlin-processes-geophys.net 1023-5809 1607-7946 11 4 2004 10.5194/npg-11-441-2004 http://www.nonlin-processes-geophys.net/11/441/2004/ http://www.nonlin-processes-geophys.net/11/441/2004/npg-11-441-2004.html http://www.nonlin-processes-geophys.net/11/441/2004/npg-11-441-2004.pdf 441 445 2004-09-28 Multifractal structure of the large-scale heliospheric magnetic field strength fluctuations near 85AU L. F. Burlaga NASA-Goddard Space Flight Center, Laboratory for Extraterrestrial Physics, Code 692, Greenbelt, Maryland 20771, USA During 2002, the Voyager 1 spacecraft was in the heliosphere between 83.4 and 85.9AU (1AU is the mean distance from the Sun to Earth) at 34° N heliographic latitude. The magnetic field strength profile observed in this region had a multifractal structure in the range of scales from 2 to 16 days. The multifractal spectrum observed near 85AU is similar to that observed near 40AU, indicating relatively little evolution of the multifractal structure of the magnetic field with increasing distance in the distant heliosphere in the epoch near solar maximum.