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
Natural and Environmental Disaster Information Exchange System NEDIES, European Commission, Directorate General Joint Research Centre (DG JRC), Institute for the Protection and Security of the Citizen (IPSC), Ispra (Varese) Italy, http://nedies.jrc.it/index.asp?ID=82#Top, ScienceMaster, physical Science, Earthquake Glossary, CA, USA 2010. http://www.sciencemaster.com/physical/item/earthqu ake_glossary.php, (ND/ Erthq - Amer) {161}