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Table 1 Jerk occurrence time and amplitude at several observatories regarding the Y-component

From: Signs of a new geomagnetic jerk between 2019 and 2020 from Swarm and observatory data

  2017 nominal jerk 2020 nominal jerk
  Date (year) Amplitude (nT/year2) Date (year) Amplitude (nT/year2)
API 2019.77 ± 0.06 − 18 ± 2
TUC 2019.70 ± 0.08 7.3 ± 1.0
ASC 2019.21 ± 0.15 − 13.3 ± 1.2
EBR 2019.34 ± 0.12 − 7.2 ± 1.0
LRM 2018.05 ± 0.08 − 6.0 ± 0.4
KNY 2019.97 ± 0.06 9 ± 2
CNB 2017.20 ± 0.02 6.7 ± 0.4
  1. Positive amplitudes denote V-shapes, while negative amplitudes denote Λ-shapes of the SV trend. The "–" symbol indicates that the jerk was not evident at that observatory or not enough data are available after the 2020-jerk