6 ms·
As far as I understand it, the primary reason is that gravity is a much weaker force than any of the others, so detecting gravitational effects is difficult unl
by chousuke 7y ago
As far as I understand it, the primary reason is that gravity is a much weaker force than any of the others, so detecting gravitational effects is difficult unless the scale of the event is colossal. These instruments are extremely sensitive; the effects they detect are just that small.
- kovrik 7y agoYep, gravity is 39 orders of magnitude weaker than electromagnetic force. https://en.wikipedia.org/wiki/Hierarchy_problem https://en.wikipedia.org/wiki/Hierarchy_problem
- User23 7y agoIt may be weak, but we can still measure it quite accurately: “...Concluding on a lighter topic, let me remind the GGP community of what I recall as probably the most memorable moment of the first campaign. It occurred at the GGP Workshop in Munsbach Castle, 1999, when Virtanen was describing the effect of snow cover on the residual gravity at Metsahovi. He showed a figure of gravity increasing by about 2 microgal over a 4-h period as men shoveled snow from the roof of the SG station, when a member of the audience asked why there was an interruption in the rise of gravity, Heikki said this was a 'tea break'...” D. Crossley, in Journal of Geodynamics 38/3-4 (2004), p. 234.