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Model Visuals

Some GEM Global Strain Rate Model (GSRM) results are shown in the following visualizations. The model and results are by the Nevada Geodetic Laboratory, University of Nevada at Reno (UNR). The imagery, the KMZ file, and the Jules Verne Voyager visualizations were made by UNAVCO. The grid resolution is 0.1 degree by 0.1 degree, close to 10 km resolution.

Model Data

Users can obtain text files with model results and input data by contacting Corné Kreemer (kreemerunr.edu).

Google Earth

KMZ file of GEM strain rate magnitude imagery

Colors show strain rate magnitude (second invariant of the strain rate tensor), in units of nanostrain (10^-9) per year..

Jules Verne Voyager

Thumbnail links to the strain rate magnitude, velocity vectors, and strain style, in the interactive Jules Verne Voyager:

The UNAVCO Jules Verne Voyager shows the GSRM's strain rate magnitude (second invariant of the strain rate tensor), and also velocity vectors, strain style, and other strain parameters. To see a legend for the colors, when you have the image you want, click on the 'pop-up' menu (pop-ups for jules.unavco.org must be allowed) and then click on 'anc' for "ancillary information".

To learn how to use Voyager, see Jules Verne Voyager: Getting Started, the Tutorial, and the Advanced Help. Some Java plugins do not run the Jules Verne Voyager.

GEM GSRM GPS Velocities Google Maps Tool

Click for the GEM GPS Velocities Viewer with user velocity comparison and vector rotation tool.

GEM GSRM Strain Rate Maps

Maps of GSRM's strain rate magnitude (second invariant of the strain rate tensor), in units of nanostrain (10^-9) per year. Grid is 0.1 degree by 0.1 degree resolution, approximately 11 km resolution.

The topography is colored by elevation. Topography data is from Global Digital Elevation Models: Smith and Sandwell v11.1.

Image legends show strain rate magnitude values by color, in units of nanostrain (10^-9) per year.

Asia
Asia zoomed
Europe
Europe zoomed
Western Hemisphere
North America
South America
Pacific
Pacific zoomed

Here are map images of GSRM's strain rate magnitude (second invariant of the strain rate tensor). for some of the Geohazard Supersites. The GSRM model's grid, visible in the maps, is of resolution 0.1 degree by 0.1 degree.

The imagery was made by UNAVCO. The maps' legends show strain rate magnitude values by color, in units of nanostrain (10^-9) per year. You can see individual grid cells represented by single color squares in the maps. The squares are about 11 km along the north-south sides.

Chile
Haiti
Iceland
Greece and Turkey
Istanbul
Etna, Vesuvius, and Italy
Tokjo
Japan
Los Angeles
Seattle and Vancouver

The maps' projections are 'square' latitude-longitude, to enable these images to be used in mapping tools such as Google Earth. The gray latitude and longitude lines are on exact integral values of latitude and longitude. To convert the black background to transparent, on Linux use Image Magic's "convert" command, such as:

  convert GEM_GSRM_Supersites_lat_lon_Chile.png -transparent black GSRM_Chile_transpar.png

to make the true black pixels transparent in the new image file GSRM_Chile_transpar.png.