Data and Tools
RTD - Geomagnetism
View graphs of real-time magnetic data from USGS and partner observatories and download historical definitive data.
Movie-maps of low-latitude horizontal-intensity magnetic disturbance are derived from magnetic vector time series data collected at multiple ground-based observatories. Using a technique similar to that used in the calculation of Dst, a quiet time baseline is subtracted from the time series from each observatory. The remaining disturbance time series are shown in a polar coordinate system that...
Real-time HEZF index display from USGS geomagnetic observatories internet feeds without filling gaps with satellite data