Events in this spectral region are characterized by a quantity called the dispersion measure, which had a remarkably high value of 375 for an event named after Duncan Lorimer. In 2006, ARCADE detected noise in this spectral region that was sixfold higher than expected for still-unknown reasons, which has been dubbed a “space roar.” The CHIME telescope has predominantly been used to detect mysterious, extragalactic events in this region lasting milliseconds; (-5[1])those are ■END■