Journal
SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
Volume 14, Issue 9, Pages 668-681Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016SW001376
Keywords
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Funding
- SHIELDS project, a LANL/Laboratory Directed Research and Development (LDRD) Program - U.S. Department of Energy
- Department of Homeland Security
- LANL LDRD award [20150127ER]
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Geoelectromagnetic disturbances (GMDs) are an important consequence of space weather that can directly impact many types of terrestrial infrastructure. In this paper, we analyze 30 years of SuperMAG magnetometer data from the range of magnetic latitudes 20 degrees <= lambda <= 75 degrees to derive characteristic latitudinal profiles for median GMD amplitudes. Based on this data, we obtain a parameterization of these latitudinal profiles of different types of GMDs, providing an analytical fit with Dst-dependent parameters. We also obtain probabilistic estimates for the magnitudes of 100 year GMDs, finding that B = 6.9 (3.60-12.9) nT/s should be expected at 45 degrees <= lambda <= 50 degrees, exceeding the 5 nT/s threshold for dangerous inductive heating.
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