Fractal : A geometrical structure or object which is self-similar on all scales (i.e., scale invariance), and is quantified by a fractional (instead of an integer) dimension. See Mandelbrot and Frame (2002) for a general review of fractals
Peter Bormann, Keiiti Aki, William H. K. Lee, and Johannes Schweitzer (Compilers and Amenders), Glossary of Terms Interest to Earthquake and Engineering Seismologists (Version 1), Publication records from external use of GFZ scientific infrastructure, Germany 2011. http://gfzpublic.gfz-potsdam.de/pubman/item/escido c:56137:3/component/escidoc:56143/Glossary_rev1.pd f, (ND/ Erthq - Amer) {980}