'IN THE FIRST months of 2020, the vibrations of the Earth changed. As monitored by a global network of seismologists, the average daily displacement of the surface of the planet – measured in nanometres, or increments of one billionth of a metre – fell around the world, from Nepal to Barcelona to Brussels. In Enshi, in China’s Hubei province, and in New York City, average ground displacement fell to less than one nanometre from pre-pandemic levels of 3.25 nm and 1.75 nm respectively'. (Ashley Hay : Introduction)