Fig. 7
a) Fast drifting quasi-periodic “fat” S events (FS) with a negative drift rate ~-30 MHz/s. The rectangular area is zoomed in b). The high resolution image in b) reveals superimposed or forking QS bursts (encircled) with their usual drift rate ~-17 MHz/s and bandwidth ~10 kHz. Resolution: 1 pixel = 32 kHz × 2 ms a), 8 kHz × 0.5 ms b). Blue and green segments illustrate drift rates.
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