percent "g". G or g is the force of gravity (an acceleration of 9.78 meters/second2). When there is an earthquake, the forces caused by the shaking can be measured as a percentage of the force of gravity, or percent g. Found on http://www.encyclo.co.uk/local/21456
percent "g". G or g is the force of gravity (an acceleration of 9.78 meters/second2). When there is an earthquake, the forces caused by the shaking can be measured as a percentage of the force of gravity, or percent g.