Hazard in Comparison

_{The figure on the left shows an example comparison, at Martigny, of the 2015 hazard model (CH15) with the 2004 model (CH04) for various frequencies and the SIA-defined standard spectra (SIA261).Compared with CH04, CH15 covers a wider frequency range and for certain frequencies shows somewhat higher hazard. On the right we compare the models using so-called hazard curves — the expected return periods of spectral acceleration — for Basel at a frequency of 5 Hz.}