Seismology has been the primary focus in the creation of the GSN, but the infrastructure is inherently multi-use and can be extended to other disciplines. GSN instrumentation measures and records with high fidelity all seismic vibrations possible from high-frequency, strong ground motions near an earthquake to the slowest global Earth oscillations excited by great earthquakes. The stations of the GSN attempt to obtain the best possible recording capability, balanced with global geographic coverage. The NSF component is part of NSF’s SAGE facility, operated by the Incorporated Research Institutions for Seismology (IRIS) under Cooperative Support Agreement EAR-1851048.
#Usgs 3d earthquake map install#
Geological Survey (USGS), coordinated with the international community, to install and operate a global, multi-use scientific facility as a societal resource for Earth observations, monitoring, research, and education. The Global Seismographic Network is a cooperative scientific facility operated jointly by the National Science Foundation (NSF) and the U.S.
The map above shows the distribution of the current station network with respect to network operations. This hazard map results from an integration process that is solely the responsibility of the GEM Foundation.The Global Seismographic Network (GSN) is a 152 station, globally distributed, state-of-the-art digital seismic network that provides free, realtime, open access data through the IRIS DMC. These models represent the best information publicly accessible, and the GEM Foundation recognises their credibility and authoritativeness. This hazard map is the combination of results computed using 30 hazard input models covering the vast majority of landmass. Readers seeking this information should consult national databases. The values of seismic hazard in this map do not constitute an alternative nor do they replace building actions defined in national building codes. The information included in this map must not be used for the design of earthquake-resistant structures or to support any important decision involving human life, capital and movable and immovable properties. This map was created for dissemination purposes.
#Usgs 3d earthquake map license#
This work is licensed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA): Legal statements Global Earthquake Model (GEM) Seismic Hazard Map (version 2018.1 - December 2018), DOI: 10.13117/GEM-GLOBAL-SEISMIC-HAZARD-MAP-2018.1 Many thanks to our Sponsors and Contributors. Technical details on the compilation of the hazard and the underlying models are available at. The GEM Foundation plans to release future updates of this map on a regular basis as new information becomes available. Due to possible model limitations, regions portrayed with low hazard may still experience potentially damaging earthquakes. The map and the underlying database of models are a dynamic framework, capable to incorporate newly released open models. Greenland) are currently not covered by a hazard model. Overall the differences between the original and translated model results are small, notwithstanding some diversity in modelling methodologies implemented in different hazard modelling software. While translating these models, various checks were performed to test the compatibility between the original results and the new results computed using the OpenQuake engine.
#Usgs 3d earthquake map software#
The map is based on a database of hazard models described using the OpenQuake engine data format (NRML) those models originally implemented in other software formats were converted into NRML. A smoothing methodology was applied to homogenise hazard values along the model borders. The OpenQuake engine, an open-source seismic hazard and risk calculation software developed principally by the GEM Foundation, was used to calculate the hazard values. The map was created by collating maps computed using national and regional probabilistic seismic hazard models developed by various institutions and projects, and by GEM Foundation scientists. The Global Earthquake Model (GEM) Global Seismic Hazard Map (version 2018.1) depicts the geographic distribution of the Peak Ground Acceleration (PGA) with a 10% probability of being exceeded in 50 years, computed for reference rock conditions (shear wave velocity, VS30, of 760-800 m/s). Monelli Publication dateġ0.13117/GEM-GLOBAL-SEISMIC-HAZARD-MAP-2018.1 LicenseĬreative Commons BY-NC-SA 4.0 (CC BY-NC-SA 4.0)
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