Global Ground Motion Prediction Equations

The main goal of the Global GMPE project is to select a suite of Ground Motion Prediction Equations that can be used at both the global and regional level for hazard and risk assessment, by using a collaborative approach.

The project has a 24month duration and a budget of 450.000 Euro to achieve the above mentioned goal.

Consortium
PEER, the Pacific Earthquake Engineering Research Center,  leads a consortium that furthermore includes 26 international collaborators who combined have extensive GMPE expertise on allmost all parts of the world. Click here to read about them and their expertise.

There is furthermore a project coordination committee which consists of 4 international experts who coordinate the tasks, and communicate with GEM’s Executive Committee and the Regional Programs.

Approach
The experts will compare the observed data in their regions with those predicted by a the short-listed GMPEs obtained in task 3. They will consult colleagues in the region where and when necessary.

  • For a given GMPE, if there is no significant trend in the regional residuals, it will imply that the GMPE is generally applicable to the region, and the GMPE will be selected for use.
  • If there is a significant trend in the residuals, either (a) the GMPE will be modified to remove the trend (where possible; or (b) the GMPE will not be selected.

Tasks
The work is revolved around 6 tasks; which are explained in more detail on a dedicated page.

Task 1: Definition of a consistent strategy of modelling ground motion; a) consistency in model parameters, b) consistency in site parameters.
Task 2: Compilation and critical review of GMPEs
Task 3: Selection or derivation of a global set of GMPEs.
Task 4: Inclusion of near-fault effects
Task 5: Database of Recorded Waveform
Task 6: Specifications for compilation of a global database of Soil Classification.

Relevant issues
In order to support a positive project outcome, the following ingredients are of importance:

  • Building upon ongoing projects and using current output and knowledge to bring into the model; [for example NGA-East: development of GMPEs for stable continental regions and NGA-West 2: update of NGA-West GMPEs].
  • Cooperation with other consortia and Regional Programmes on GMPE standards and use
  • In-kind contribution which contributes to efficient spending of the budget
  • Sharing of results; [after about 1,5 year a supplemental report with the latest developments in GMPEs worldwide will be published].

Presentations


Contact
The project is managed by Yousef Bozorgnia, who is assisted by Carola Di Alessandro: yousef[a]tberkeley.edu and carola.dialessandro[at]berkeley.edu
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