Which Country Invented This Earthquake Detector
The earliest seismoscopeseismoscopeModern sensitivities come in three broad ranges: geophones, 50 to 750 V/m; local geologic seismographs, about 1,500 V/m; and teleseismographs, used for world survey, about 20,000 V/m.https://en.wikipedia.org › wiki › SeismometerSeismometer – Wikipedia was invented by the Chinese philosopher Chang Heng in A.D. 132. This was a large…