An undated - clipping from a New Zealand newspaper, some time in the early '80s reads...
Rock band really did
Brussells [sic] A concert on October 28 by the Irish new wave band U2 in Brussels rocked not only their fans but also seismic equipment at the Belgian Meteorological Institute, scientists said today. Martine Debecker of the Royal Meteorological Institute said its equipment measured unknown vibrations on October 28. The culptit has since been found: U2 which gave an ear-shattering concert in a music hall 5km away that critics have termed frightening and possessed.