285 Analysis of Ground-Based Magnetometer Data for Regional Correlation and Space Wx Risk Assessment

Monday, 7 January 2013
Exhibit Hall 3 (Austin Convention Center)
Joseph DiTommaso, University of Alaska, Fairbanks, Fairbanks, AK; and D. Newman and D. Ogata

One of the oldest and most ubiquitous instruments for the behavior of the magnetosphere is the ground-based magnetometer. With stations from the Arctic to India, magnetometer installations have collected a large and extensive data set of geomagnetic measurements at the Earth's surface. This data set provides an interesting opportunity to investigate signals of the magnetic field at varying latitudes for different events and timescales. Underlying complex dynamical relationships may be evident in these data sets, and as such could be utilized to understand regional correlations. To investigate these relations, several analyses including Probability Distribution Function (PDF) and the Hurst R/S test are used, searching for heavy tail signals for large impact events. Cross-correlation analysis will also be run to search for these possible latitudinal-spanning relationships. If these correlations are observed, it may be possible to extrapolate prediction of large event frequencies for low latitude, high population areas using the more active and sampled data of the northern latitudes. The poster builds upon the analyses mentioned in further detail and demonstrates possible regional correlations.
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