GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 2.2 GNGTS 2024 Fig. 1 Example distribuCon of M and R with indicaCon of the mean and modal scenarios. For each distribuCon, mean and modal scenarios of M - R are then compared to the upper- bound curves defined by Keefer (1984) and the preferred magnitude is selected as follows: ● if all M - R pairs stand above the reference upper-bound curve, then the triggering of earthquake-induced landslides can be neglected. ● if at least one M - R pair is below the reference upper-bound curve, then the triggering of earthquake-induced landslides can not be discounted. ● if more than one M - R pair lies below the reference upper-bound curve, then the triggering of earthquake-induced landslides can not be excluded and the M - R scenario that contributes the most to hazard (i.e., the M - R pair with the largest PMF value) is selected as the preferred magnitude. Figure 2 shows an applicaCon of the criteria above to the case displayed in Figure 1.

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