This document provides an overview of the PSHA input models collected during GEM1, of the engine used to perform PSHA calculations, and the methods and criteria adopted for computing a proof-of-concept global hazard map.

The report reviews a set of probabilistic seismic hazard analysis (PSHA) computer programs (CRISIS, EQRM, NSHMP, OpenSHA, and SEISHAZ) proposed as possible platforms for the development of the GEM1’s hazard engine. The analysis is supplemented by including a number of additional software (FRISK88M, MoCaHAZ, MRS, OHAZ, and SEISRISK IIIM) considered important to obtain a more comprehensive understanding of the current state-of-the-art in PSHA.

New relationships between modified Mercalli intensity (MMI) and engineering ground-motion parameters are developed for Greece. The ground-motion parameters investigated were peak ground acceleration (PGA), velocity, displacement, Arias intensity, and cumulative absolute velocity. The observed earthquake intensity is quantified in terms of the observed MMI at the recording station and the data set consists of 310 time histories recorded from 89 Greek

The FEM was used to analyse the pattern of ground deformations caused by the potential slip of a known active fault crossing the Corinth Canal. The analysis was based on detailed geological- geotechnical data of the area and showed regions possessing high risk of future slope movements and traffic discontinuation across this serious marine navigation project of Eastern Mediterranean.

A software package with a friendly user interface has been developed for training engineers, geoscientists and city officials in all the subjects of seismic risk assessment and its reduction. As a pilot city we selected the city of Patras which is a representative middle size S. European city consisting of a great variety of old and new buildings, very complicated geology and very high seismic risk. The algorithm permits the trainee to experiment

Corinth canal is one of the most important navigation projects made in Greece and plays a significant role in marine transportation connecting the Ionian sea to the West through the Corinth Gulf and Saronikos Gulf to the Aegian sea to the East. It has a total length of 6.3km and due to its steep slopes possesses serious slope instability problems. This work deals with the effect that local seismicity has upon Corinth Canal by assessing the corresponding

New empirical attenuation relationships of Arias Intensity for various site conditions based on the strong-motion data recorded in Greece are presented. With regard to attenuation relationships, for the region of Greece, there are no Arias Intensity empirical attenuation models available today that may be used in seismic hazard analysis. For each site class, the attenuation relationship of Arias Intensity is expressed as a function of moment magnitude

The present study is a probabilistic seismic hazard assessment in terms of well known engineering parameters and is presented for the first time for the region of Greece. The following ground motion parameters have been investigated and mapped using the recently published attenuation relationships (predictive equations) of [Danciu & Tselentis, 2007], based on strong motion recordings of Greek earthquakes: peak ground acceleration (PGA), peak ground

Engineering ground-motion parameters can be used to describe the damage potential of an earthquake. Some of them correlate well with several commonly used demand measures of structural performance, liquefaction, and seismic-slope stability. The importance of these parameters comes from the necessity of an alternative measure to the earthquake intensity. In the proposed new attenuation relationship we consider peak values of strong motion, spectral