(1) Gravity was measured using a LaCoste-Romberg model G gravimeter , and readings were referenced to a BGS temporary base station located at Corrie.(2) Brown was taking the volcano's pulse with a highly sensitive device called a gravimeter .(3) Using a gravimeter , an instrument that measures the motion of the Earth's surface, Weber hoped to u2018tune intou2019 the Earth's natural frequencies and see if it had been excited by a passing gravity wave.(4) Over a thousand modes, with periods ranging from 56 minutes down to less than 40 seconds, have been identified using the present network of long-period seismometers and gravimeters .(5) Weiss worked with Dicke on building gravimeters to measure the Earth's unique resonances, its u2018ringingu2019 when excited.
