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Published on Sep 4, 2012
On Tuesday, September 4, 2012 at 0045 - 0116 UTC Mexican XHTAU, Azteca-7 relayer analog channel 2 from Tampico, Tamaulipas was detected in Tampa, Florida via sporadic-e at a distance of 1,036 air miles airing the American animated sitcom Simpsons.
Signal mid-point was 518 miles, directly in the center of the Gulf of Mexico.
Earths magnetic field (Bz component) dipped to -5 during the late 0001 UTC hour.
At the time of reception Geomagnetic K-index of 5 (NOAA scale: G1 - Minor) threshold reached at 0001 UTC.
Nine hours prior to the above mentioned event, Geomagnetic K-index of 6 (NOAA scale: G2 - Moderate) threshold was reached on September 3 at 1500 UTC.
G2 - Moderate: Potential Impact: Area of impact primarily pole-ward of 55 degrees Geomagnetic Latitude. Induced Currents: Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft: Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio: High Frequency radio propagation can fade at higher latitudes. Aurora may be seen as low as New York to Wisconsin to Washington state.