1. Delft University of Technology, Faculty of Civil Engineering and Geosciences, Department of Geotechnology, Delft, The Netherlands..
2. University of Bergen, Faculty of Mathematics and Natural Sciences, Department of Earth Science, Bergen, Norway..
3. The University of British Columbia, Faculty of Science, Department of Earth, Ocean and Atmospheric Sciences, Vancouver, British Columbia, Canada..
4. Delft University of Technology, Faculty of Civil Engineering and Geosciences, Department of Geotechnology, Delft, The Netherlands and Shell Global Solutions International BV, Rijswijk, The Netherlands..