Information content of a macroseismic field is generally summarized by tracing the isoseismals. A simple examination of a series of fields on the basis of these curves fully proves the complexity of the problem to identify a global pattern among the trends of decay of the macroseismic intensity shown by the various earthquakes. This investigation raises some questions on: 1) the dependence of the decay pattern on the epicentral intensity; 2) the existence of a specific shape for the isoseismals in a seismogenic zone; 3) the way in which the velocity of the decay changes as a function of the epicentre-site distance; 4) the possible correlation among shape of the isoseismals and some tectonic features; 5) how to quantify and include into the model the various sources of uncertainty inherent in the phenomenon.
Statistical tools in the analysis of macroseismic fields for probability modelling of the attenuation analysis of macroseismic
R Rotondi
2013
Abstract
Information content of a macroseismic field is generally summarized by tracing the isoseismals. A simple examination of a series of fields on the basis of these curves fully proves the complexity of the problem to identify a global pattern among the trends of decay of the macroseismic intensity shown by the various earthquakes. This investigation raises some questions on: 1) the dependence of the decay pattern on the epicentral intensity; 2) the existence of a specific shape for the isoseismals in a seismogenic zone; 3) the way in which the velocity of the decay changes as a function of the epicentre-site distance; 4) the possible correlation among shape of the isoseismals and some tectonic features; 5) how to quantify and include into the model the various sources of uncertainty inherent in the phenomenon.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
