Canada east of the Cordillera, extending north from the US border to the Arctic Ocean, comprises about two-third of the stable craton of the North American plate. Much of this large area appears to be substantially aseismic, although it contains several zones of significant seismicity and a few other regions of lower-level seismicity.
Tuesday, February 21, 2012
Wednesday, February 08, 2012
In 2003, a group of scientists was established to determine the stable North America reference frame (SNARF). They aimed to define a regional reference frame that is consistent and stable at the level of sub-mm yr-1 across North America (Henton et al., 2006).
Friday, February 03, 2012
Standard synthetic aperture RADAR interferometry (InSAR), is a method which is applied to phase component of two SAR images acquired from relatively close positions to form the interference patterns between the two images. If the Earth surface deforms between the two acquisitions, the surface displacement with sub-centimetre accuracy can be theoretically mapped in the absence of atmospheric artefacts (Sarti et al., 2006).