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

An analysis of the low frequency geomagnetic\udfield fluctuations at an Antarctic (Terra Nova Bay) and a low latitude\ud(L'Aquila, Italy) station during the Earth's passage of a coronal ejecta on\udApril 11, 1997 shows that major solar wind pressure variations were followed at\udboth stations by a high fluctuation level. During northward interplanetary\udmagnetic field conditions and when Terra Nova Bay is close to the local\udgeomagnetic noon, coherent fluctuations, at the same frequency (3.6 mHz) and\udwith polarization characteristics indicating an antisunward propagation, were\udobserved simultaneously at the two stations. An analysis of simultaneous\udmeasurements from geosynchronous satellites shows evidence for pulsations at\udapproximately the same frequencies also in the magnetospheric field. The\udobserved waves might then be interpreted as oscillation modes, triggered by an\udexternal stimulation, extending to a major portion of the Earth's magnetosphere.  \ud<b>Key words.</b> Magnetospheric physics (MHD waves and\udinstabilities; solar wind-magnetosphere interactions

annales geophysicae

The Earth's passage of the April 11, 1997 coronal ejecta: geomagnetic field fluctuations at high and low latitude during northward interplanetary magnetic field conditions