Discrete events
2) Sprite associated burst
The horizontal magnetic field components Bx
and By at Silberborn
(52 N, 10 E), Germany exhibit a
discrete event
at the occurence of a
sprite
associated positive
ground-to-cloud
lightning discharge
(July 15th, 6:10:22.387 UT) in the midwesetern
United States (41 N, 101 W) at 0.00 seconds.
Both components oscillate at 8 Hz, hence denoted
Earth-ionosphere cavity
resonances.