Yellowstone Monthly Update issued May 1, 2014 12:50 Volcano Alert Level NORMAL - Aviation Color Code GREEN

Ground deformation
The ground deformation occurring in north-central Yellowstone abruptly changed direction on about April 6, 2014, one week following a M4.8 earthquake in the same region. The change is most prominent on the NRWY GPS station (http://earthquake.usgs.gov/monitoring/gps/YellowstoneContin/nrwy/), but is also detectable on other nearby stations. Since April 6, 2014, NRWY has moved about 0.5 cm west, 1 cm north, and 2 cm down, reversing about 1/3 of the deformation accumulated over the previous 8 months. (Note that last months update erroneously reported that NRWY had …

Source: Volcanoes

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