  Multifractal fluctuations in the time dynamics of seismicity data have been
analyzed. We investigated the interspike intervals (times between successive
earthquakes) of one of the most seismically active areas of central Italy by
using the Multifractal Detrended Fluctuation Analysis (MF-DFA). Analyzing the
time evolution of the multifractality degree of the series, a loss of
multifractality during the aftershocks is revealed. This study aims to suggest
another approach to investigate the complex dynamics of earthquakes.
