English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a substorm event study using the four Cluster spacecraft incombination with ground-based instruments, in order to perform simultaneousobservations in the ionosphere and magnetotail. We show good correlationbetween substorm signatures on the ground and in the magnetotail, even thoughdata from the northern-ground and southern-tail hemispheres are compared.During this event ground-based magnetometers show a substorm onset overScandinavia in the pre-midnight sector. Within 1.5h the onset and threeintensifications are apparent in the magnetograms. For all the substormsignatures seen on the ground, corresponding plasma sheet boundary motion isvisible at Cluster, located at a downtail distance of 18.5 RE. As aresult of the substorm onset and intensifications, Cluster moves in and outbetween the southern plasma sheet and lobe. Due to the lack of an apparentsolar wind driver and the good correlation between substorm signatures on theground, we conclude the substorm itself is the driver for these plasma sheetdynamics. We show that in the scales of Cluster inter-spacecraft distances(~0.5 RE) the inferred plasma sheet motion is often directed inboth Ygsm- and Zgsm-directions, and discuss thisfinding in the context of previous studies of tail flapping and plasma sheetthickness variations

Correlation between ground-based observations of substorm signatures and magnetotail dynamics