This week, Red Wing welcomed six Japanese exchange students from Ikata Junior High School as part of the Red Wing Sister Cities Commission cultural exchange program.
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Preseismic Atmospheric Radon Anomaly Associated with 2018 Northern Osaka Earthquake
The concentration of the radioactive element radon is known to change in the ground before and after earthquakes. Previous studies have shown elevated radon levels in the atmosphere before the mainshock of a large inland earthquake due to foreshock activity and slow slip.
But now, researchers from Tohoku University have revealed an anomaly in this phenomenon. Through the analysis of data before and after the 2018 Northern Osaka Earthquake, they discovered that the atmospheric radon concentration decreased.
The results of their research were published online in Scientific Reports on April 2, 2021.