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calculations at any scale. This software is developed in an open environ-
ment, allowing a wider community of developers and expert-users to
jointly enhance the software. Models, databases, software and toolkits
for developing models and making decisions on retrofi tting and insur-
ance will be the main ingredients of OpenQuake. A dedicated Testing
and Evaluation facility will test datasets and model components before
they are released to the public for the fi rst time.
In order to support collaborative development of uniform and open data-
bases, standards, (regional) models and tools, a platform has been devel-
oped for GEM collaborators, experts and practitioners in earthquake risk
assessment to collaborate, share, discuss and suggest. GEM Nexus ('a
means of connection') is home to the various groups working on GEM,
who have access to a set of collaboration instruments (http://www.nexus.
globalquakemodel.org/). Nexus is also open to the wider scientifi c com-
munity who can follow the groups, provide feedback on the work being
carried out and connect with others that are making a difference in earth-
quake risk assessment.
From 2014 onwards, the OpenQuake platform will be available that will
allow researchers, agencies and institutions to adopt and enhance the tools,
provide comments and populate the datasets, so as to continuously update
and improve global risk assessment. Such a process of 'crowd-sourcing' is
obviously closely monitored and data quality-controlled to ensure the
highest quality of data and compatibility.
It is hoped and envisaged that scientists, practitioners, IT experts and
others will actually make use of the critical research gaps that we highlight,
to collaborate with us and collectively work on making the datasets, models
and tools of better use for all stakeholders worldwide.
30.2 Current status of Global Earthquake
Model (GEM)
1
GEM is currently funding fi ve hazard global components projects planned
to prepare global datasets with basic information necessary to create proba-
bilistic seismic hazard analysis (PSHA) input models. These fi ve projects
- which all started in 2010 - are: the Global Earthquake History, the Global
Instrumental Catalogue, the Global Active Fault and Seismic Source Data-
base, the Global Geodetic Strain Rate Model and the Global Ground
Motion Prediction Equations.
Requests for Proposals for fi ve Global Components related to Physical
Risk were drafted by a focus group and subsequently modifi ed based on
1
This section was drafted in April 2012.
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