OpenQuake (OQ) - comprised of the engine, platform and tools - caters to a variety of users, from modellers and researchers to emergency planners - OpenQuake is used for a wide range of purposes for disaster risk reduction and management.

OQ Engine
OQ Platform
OQ Data & Tools

Get started: OQ Engine

The OpenQuake Engine is the Global Earthquake Model Foundation’s (GEM) state-of-the-art, open-source software collaboratively developed for earthquake hazard and risk modelling. It runs on operating systems such as Linux, macOS and Windows; and can be deployed on laptops, desktops, standalone servers and multi-node clusters. The functionality to analyze hazard and risks at specific site, city, country or regional level makes the OpenQuake Engine a powerful and dynamic tool for assessing the potential impacts of earthquakes at any location in the world.


For modellers, researchers, scientists and engineers


Download the latest user manual.


Download the latest version of the


Follow the installation guide here.

For developers


Follow the instructions here.

Related Documentation

Join the OpenQuake Forum

Check OQ Engine's Project Status here.

OQ Engine Key Features


Classical PSHA*:

  • hazard curves, hazard maps, uniform hazard spectra (UHS), disaggregation


Event-based hazard:

  • stochastic earthquake event sets and ground motion fields, hazard curves, hazard maps


Scenario hazard:

  • single event - stochastically generated ground motion fields

Additional features:

  • 5 typologies for modeling seismic sources

  • 100+ GMPEs implemented and tested

  • Tools for harmonizing catalogs, creating seismogenic input files, analyzing strong motions and GMPEs


Classical PSHA-based:

  • asset-specific loss exceedance curves, average annual loss, loss maps, building typology disaggregation

Event-based risk:

  • event loss tables, loss exceedance curves - asset specific and aggregated, average annual loss, loss maps, loss disaggregation


Scenario hazard:

  • loss statistics, loss maps

Scenario damage:

  • collapse maps, damage distribution per asset and building typology

Single software

Combines hazard and risk  in a single software


Compatible with various existing hazard, vulnerability and exposure models


Calculates scenario and probabilistic hazard and risk analysis

Different Scales

Supports calculations at different scales


Accounts for wide spectrum of uncertainties


Large set of source typologies for modelling faults as well as distributed seismicity

Logic Tree

Logic tree support (representing epistemic uncertainty)

Explicit Uncertainty

Explicit representation of uncertainty, including separation of epistemic from aleatory

Pre-computed data

Runs risk calculations for precomputed hazard curves and ground motion fields

OQ Engine Calculators and Outputs

OQ Platform

The OpenQuake Platform is a website that allows the community to explore, manipulate and visualize the datasets and models and to use tools that GEM produces. The platform also allows users to contribute, share and discuss new findings and results with the GEM community.

Share your outputs - datasets, maps, models - to the GEM OpenQuake community through the Platform. The OpenQuake Platform hosts a number of national, regional and global models. Follow the instructions below to access data from GEM and the OQ community. For users who only need outputs such as datasets, layers or maps, you can simply register for free and browse the Platform for the data that you need.

To start sharing your data, follow the instructions below.

  1. Sign in or register here.

  2. Click Layers > Upload Layers

  3. Create maps based on GEM’s existing datasets or create one based on your uploaded Layer. Click Maps > Create Maps

  4. Save and Publish your map to share with the OpenQuake community.

To start browsing and downloading data, follow the instructions below.

  1. Sign in or register here.

  2. In the Search box, type the name of the map or dataset you’re looking for. Look for your item from the search results, click to Download.

  3. To customize or create your own maps, click Maps > Create Maps

  4. Click the Add Layer icon and select from the available layers from the dropdown list.

  5. Save and Publish your map.

  6. Download your map.

Openquake: Tools and Data

GEM works on a wide range of open-source source (software) tools to allow you to calculate, share and explore earthquake risk. Most of these are already embedded in the platform, but others are released as stand-alone applications.


Filters: 33 results found



User manual


Guidelines for Analytical Vulnerability Assessment-Low/Mid-Rise

Guidelines (GEM-ASV) for developing analytical seismic vulnerability functions are offered for use within the framework of the Global Earthquake Model (GEM).


User manual


Guidelines for component-based analytical vulnerability assessment of buildings and nonstructural elements

A procedure is offered for the analytical derivation of the seismic vulnerability of building classes, that is, probabilistic relationships between shaking and repair cost as a fraction of replacement cost new for a category of buildings.


User manual


Guidelines for Empirical Vulnerability Assessment

These Guidelines provide state-of-the-art guidance on the construction of vulnerability relationships from post-earthquake survey data.


User manual


Integrated Risk Modelling Toolkit Manual

At the core of the Global Earthquake Model (GEM) is the development of state-of-the-art modeling capabilities and a suite of software tools that can be utilized worldwide for the assessment and communication of earthquake risk.

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