Blasts from the Past: Orbiting radar spots old nuclear-test sites

Satellite analysis can reveal sites of past underground nuclear tests, U.S. government scientists report. The technique can detect the settling of ground above blasts that occurred decades ago, before current monitoring networks were established.

SINKING FEELING. Ground subsidence around the Nevada Test Site’s Junction cluster (arrow) of underground nuclear tests (asterisks) shows up on InSAR images as fringes of pink and yellow.