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

Abstract Following the observed pattern of a new geomagnetic jerk every 3–4 years, certain predictions suggested that event should occur around 2020 after one 2017.5. In this work, we explore scenario by analysing secular variation East field component in both ground and satellite data. At ground, use available data from 2015 to 2021 10 observatories worldwide distributed. This analysis shows occurrence mentioned mid-2017 at located Pacific region, but also reveals between mid-2019 early with clear global character. Swarm corroborate these findings means estimated using virtual 440 km altitude. addition, general view most recent CHAOS model confirms character 2020-jerk V-shaped changes meridional sectors covering Eastern Pacific, America, Asia Indian Ocean; ?-shapes Europe, Africa Western Pacific. The radial core–mantle boundary is investigated as origin jerk. Results show global-average acceleration exhibits pulse mid-2018, establishing starting epoch 2020-jerk.