Tremors in Earth's magnetic field around 11:11:11........
Spaceweather.com
TREMORS IN EARTH'S MAGNETIC FIELD: Solar wind flowing from a hole in the sun's atmosphere has been buffeting Earth's magnetic field since Nov. 9th, sparking polar auroras and geomagnetic "quakes." Stuart Green detected the tremors from his private magnetic observatory in Preston, Lancashire, UK.
"The solar wind delivered a double blow, moving magnetometer needles around the globe," reports Green. "The first wave arrived on November 9th at approximately 18:00 UT and lasted for 4.5 hrs. The second wave arrived almost 24 hrs later. It was less geoeffective than the first, although no less spectacular according to the beautiful images of the aurora being submitted to Saceweather.com."
The squiggles in Green's chart represent changes in the local magnetic field caused by the buffeting of solar wind high overhead. "The sensor is buried in my garden about 0.5 meters below the surface in an East/West orientation," he explains. "This allows very sensitive (sub nanotesla) measurements of magnetic declination during geomagnetic storms. The plot shows the change in magnetic flux density in nanotesla occurring between readings every few minutes."
