The project is regulated by Cornwall Council. Our seismicity management protocol uses existing British Standards and planning guidelines for blasting, quarrying and mining activity. Importantly, it is based on how much ground vibration is measured at the surface, referred to as Peak Ground Velocity, or PGV. This is believed to be a more accurate depiction of what will be felt by people in the local area compared to the magnitude (ML) of an event (see “What does seismic magnitude mean?” section).