The correlations between macroseismic intensity and peak-ground acceleration, and between macroseismic intensity and Arias intensity are compared. The data base consists of 56 records (168 time histories related to NS, EW and Z components) derived from nine Italian earthquakes that occurred between 1980 and 1990. The intensity data have been determined using two approaches: (1) the standard approach, which is a general description of the effects on a certain village/town (general intensity), and (2) a localized approach, based on a description of effects in the immediate vicinity and in the same lithological, morphological and hydrogeological conditions as the recording instrument itself (local intensity). This second approach to determining intensity could more closely approximate the ground-motion parameters obtained from the accelerograms. Indeed, the results of the regressions that were performed show a clear improvement in the correlation when using the local instead of the general intensity in a comparison with peak-ground acceleration/Arias intensity. © 1992.
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology