Geomagnetically Induced Currents Measured in BPA Transformers, Near-Real-Time
Charged particles from the sun impacting Earth's magnetic field sometimes introduce significant currents into
BPA's transmission system. These currents can be measured on the wire connecting a 3-phase power transformer's
neutral to ground. The chart below illustrates GIC data from 11 BPA substations.
Data automatically refreshes every 5 minutes...
Download data (tab separated values)
Image and data update independently of page refresh;
Content Manager: Dan Goodrich, Transmission Technical Operations