Skip to Main content Skip to Navigation
Journal articles

First detection of the supersonic upward plasma flow structures in the early morning sector

Abstract : We present the first observations of the supersonic updrafting plasma drifts in the predawn sector. Two DMSP satellites quasi-simultaneously detected two fast-speed events: one of ~385 km spatial extension and with the maximum upward velocity of 1683 m/s appeared at ~3 LT, and the other of ~1500 km large with maximum speed of 1770 m/s occurred at ~5 LT. Both supersonic structures were observed above the eastern Pacific region, separated by ~35° of longitude in space and by 45 min in time. The events occurred at the recovery phase of the geomagnetic storm of 19 February 2014, during rapid oscillations of the interplanetary magnetic field B z and the interplanetary electric field E y components, which increased the eastward electric field in the equatorial nighttime ionosphere and triggered the generation of plasma irregularities. The storm time penetration electric fields seem to be the principal driver of the observed supersonic events.
Document type :
Journal articles
Complete list of metadatas

Cited literature [41 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01514041
Contributor : Eva Fareau <>
Submitted on : Tuesday, April 25, 2017 - 3:38:15 PM
Last modification on : Friday, March 27, 2020 - 2:13:05 AM
Long-term archiving on: : Wednesday, July 26, 2017 - 2:15:22 PM

File

Astafyeva_et_al-2015-Geophysic...
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Elvira Astafyeva, Irina Zakharenkova. First detection of the supersonic upward plasma flow structures in the early morning sector. Geophysical Research Letters, American Geophysical Union, 2015, 142, pp.9642-9649. ⟨10.1002/2015JA021447⟩. ⟨insu-01514041⟩

Share

Metrics

Record views

298

Files downloads

831