- Geodetic Strain Rate Model (v2.1)
- CC BY-SA 3.0
+ Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
+ For more info see http://creativecommons.org/licenses/by-sa/3.0/.
The model is based on the largest self-consistent set of secular velocities
It is the best estimate of present-day plate motions and strain accumulation, being potentially released through earthquake events
The model is a significant improvement over the one that was produced in 2004
The model includes estimates of uncertainty; while GPS velocity uncertainties are typically 0.1-0.3 mm/yr, the strain rate uncertainty at any point is largely dependent on the GPS station density.
- Publication Date
- Dec. 19, 2014, 6:23 p.m.
- GC , geodetic , global component , strain
- Seismic Hazard
Strain rate measures how fast the outer solid part of the earth (the lithosphere) is being deformed due to tectonic plate movement. At some places, the lithosphere is brittle enough to produce earthquakes by faulting, such as within a subducted oceanic plate. When earthquakes happen they release the accumulated crustal strain and therefore strain rate is a proxy for earthquake potential. Strain rate measurements can also be compared to the rate with which faults slip and with earthquake activity rates, to better understand seismicity in an area.
- Supplemental Information
- C. Kreemer, G. Blewitt and E. C. Klein (2014) A geodetic plate motion and Global Strain Rate Model. Geochemistry, Geophysics, Geosystems, 15, 3849 - 3889.