Nonlinear changes in seismic scaling before the Iceland earthquake of June 17, 2000

The multifractal fields modeling the spatial distribution of the epicenters and temporal behavior of weak seismicity before the earthquake that occurred on June 17, 2000 in Iceland (M = 6.6) are analyzed. It is shown that the main shock of this event was preceded by the broadening of the f(a) spectra of the proxy fields of both the spatial distribution of the epicenters and the temporal behavior of weak seismicity. The physical interpretation of this effect is presented.