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Global homogenized datasets

Datasets are the critical starting point for most assessments and are based on best practice that can be replicated. GEM’s international team together with international consortia of leading experts, and the wider community, are working on the development of uniform datasets, based on the latest developments in the field.  

The OpenQuake platform will feature a series of global homogenized datasets, which will be continuously enhanced for increased use at the local community level.

The following datasets are already available:

ISC-GEM Global Instrumental Earthquake Catalogue [1900-2009]

The ISC-GEM Global Instrumental Earthquake Catalogue is a homogenous global catalogue of nearly 20,000 earthquakes. Archiving and re-assessing records from the early days of instrumental seismology at the beginning of the 20th century through to the present day. The catalogue represents the state-of-the art record for earthquake locations and magnitudes available today.

GEM Global Historical Earthquake Catalogue [1000-1900]

A catalogue archiving almost a thousand earthquakes. Using the most detailed and up-to-date studies in the scientific literature,spanning over a millennium, from the early Middle Ages (1000 CE) to the advent of instrumental recording at the beginning of the 20th century (1903 CE). The catalogue provides detailed parameters on 827 earthquakes of magnitude greater than 7 across the globe.

Spatial distribution of seismic events

A remarkable difference in spatial distribution of events occurs when the historical catalogue (top) is combined with events from the instrumental catalogue (bottom) in the Mexico/Guatemala region

The following datasets are currently been developed:

The individual early release of some of these datasets before the end of 2014 (as in the cases of the Instrumental and Historical catalogues) has and will continue to allow the scientific community to further test them and integrate them within research. However, the main advantage of the OpenQuake platform is that such datasets will be brought together for the first time within a single environment, allowing users to explore, for example, how strain rate data and catalogues are correlated, how many buildings are located near active faults, and so on.

The presentations below will give you a flavour of the potential of these datasets and their complementarity in providing a more precise and complete assessment of seismic risk and its mitigation.