Fig. 2.
From: Automatic detection of sudden commencements using neural networks
Top panel, amplitude of all SC listed measured at Ebro. Mid panel change of rhythm of all SC listed measured at Ebro. Bottom panel slope of all SC listed measured at Ebro. With a thin line is showed typical threshold value for low-latitude stations, 3 nT/min, we found 13% of cases under this threshold. However, there are only 1.6% of cases under the threshold of 2 nT/min.