Examination of NERC GMD Standards and Validation of Ground Models and Geo-Electric Fields [open pdf - 4MB]
"The analysis of the US electric power grid vulnerability to geomagnetic storms was originally conducted as part of the work performed by Metatech Corporation for the Congressional Appointed US EMP [electromagnetic pulse] Commission, which started their investigations in late 2001. In subsequent work performed for the US Federal Energy Regulatory Commission, a detailed report was released in 2010 of the findings . In October 2012, the FERC [U.S. Federal Energy Regulatory Commission] ordered the US electric power industry via their standards development organization NERC [North American Electric Reliability Corporation] to develop new standards addressing the impacts of a geomagnetic disturbance to the electric power grid. NERC has now developed a draft standard and has provided limited details on the technical justifications for these standards in a recent NERC White Paper 22."
First EMP Commission: http://www.firstempcommission.org/