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 (, 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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