Helsinki Analysis Seminar March 16, 2015 Speaker: Ilgiz Kayumov Abstract: The topic of the talk is Makarov's law of the iterated logarithm and metrical properties of harmonic measure. We are going to explain how the integral means spectrum near the origin is related to the Makarov law of the iterated logarithm. Also we are going to discuss the relations between the asymptotic variance, boundary behaviour of conformal mappings and asymptotical behaviour of the integral means spectrum near the origin.