The upward movement of the Yellowstone caldera floor between 2004 and 2008—almost each year—was more than three times greater than ever observed since such measurements began in 1923. From 2004 to 2008, the land surface within the caldera moved upward as much as at the White Lake GPS station. By the end of 2009, the uplift had slowed significantly and appeared to have stopped. In January 2010, the USGS stated that uplift of the Yellowstone Caldera has slowed significantly and that uplift continues but at a slower pace. The USGS, University of Utah and National Park Service scientists with the Yellowstone Volcano Observatory maintain that they see no evidence that another such cataclysmic eruption will occur at Yellowstone in the foreseeable future. Recurrence intervals of these events are neither regular nor predictable. This conclusion was reiterated in December 2013 in the aftermath of the publication of a study by University of Utah scientists finding that the size of the magma body beneath Yellowstone is significantly larger than had been thought. The Yellowstone Volcano Observatory issued a statement on its website stating,