BLOOMINGTON, Ind. -- An Indiana University seismologist says equipment IU operates as part of a Midwestern earthquake-monitoring network detected this week's nuclear test in North Korea.
IU operates seismographs in a network of about 70 such devices in Indiana, Illinois, Missouri and Kentucky that track the North America continent's seismic activity.
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Professor of geological sciences Michael Hamburger says some seismographs in that network detected the North Korean blast around 10:10 p.m. Monday, about 13 minutes after the nuclear device was detonated.
He says the IU experiment picked up a P-wave signal from the explosion at detectors in Missouri. That explosion was equivalent to a magnitude 5.1 earthquake.
Monday's nuclear test in North Korea is the authoritarian communist nation's third to date.