Magnetic Disturbance Movies

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 accommodates both Earth rotation and the universal time dependence of magnetospheric disturbance. Each magnetic storm recorded in the movie-maps is different. While some standard interpretations about the storm time equatorial ring current appear to apply to certain moments and certain phases of some storms, the movie-maps also show substantial variety in the local time distribution of low-latitude magnetic disturbance, especially during storm commencements and storm main phases.

Sample Frame

Movie Files

1999.04.17 (130 MB)
1999.05.11 (353 MB)
1999.09.22 (135 MB)
1999.10.22 (230 MB)
2000.07.16 (318 MB)
2000.08.12 (311 MB)
2000.09.17 (384 MB)
2000.10.05 (382 MB)
2000.11.06 (384 MB)
2001.03.20 (410 MB)
2001.03.31 (470 MB)
2001.04.11 (461 MB)
2001.10.03 (463 MB)
2001.10.21 (159 MB)
2001.10.28 (400 MB)
2001.11.06 (167 MB)
2001.11.24 (114 MB)
2002.04.20 (312 MB)
2002.09.08 (113 MB)
2002.10.01 (466 MB)
2003.10.30 (241 MB)
2003.11.20 (161 MB)
2004.07.27 (480 MB)
2004.11.08 (394 MB)
2005.05.15 (79 MB)
2005.05.30 (295 MB)
2005.08.24 (114 MB)
2005.09.11 (384 MB)
2006.12.15 (117 MB)

Related work published by USGS scientists include:

Primary USGS contact: Jeffrey J. Love