Extract from British Geological Survey Report:
BGS received several reports from residents of an earthquake in the Finsbury park area of NE London on 8 and 9 August 1992 at 20:30 UTC and 20:OO UTC, respectively. They were felt in Green Lane, Rowley Gardens and Anwell Court and reports included “cracked balcony” and “cracked windows”. The local police evacuated 3 tower blocks and the Fire Department checked for damage before allowing re-entry. The times both corresponded to a Madness pop concert in Finsbury Park and it was concluded that this was the cause of the disturbances. No significant earthquakes were detected at these times on the national monitoring network although the nearest station was some 30 km away.