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Earth, Planets and Space

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
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