Motion of the dipolarization front during a flow burst event observed by Cluster

This paper presents the results of work undertaken to develop and test contrasting data analysis approaches for the detection of bursts/leaks and other anomalies within wate r supply systems at district meter area (DMA)level. This was conducted for Yorkshire Water (YW) sample data sets from the Harrogate and Dales (H&D), Yorkshire, United Kingdom water supply network as part of Project NEPTUNE EP/E003192/1 ). A data analysissystem based on Kalman filtering and statistical approach has been developed. The system has been applied to the analysis of flow and pressure data. The system was proved for one dataset case and have shown the ability to detect anomalies in flow and pres sure patterns, by correlating with other information. It will be shown that the Kalman/statistical approach is a promising approach at detecting subtle changes and higher frequency features, it has the potential to identify precursor features and smaller l eaks and hence could be useful for monitoring the development of leaks, prior to a large volume burst event.

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A model of the gamma-ray burst event of 1979 March 5 (paper I)

Chinese Astronomy and Astrophysics ◽

10.1016/0275-1062(82)90060-1 ◽

1982 ◽

Vol 6 (1) ◽

pp. 28-32 ◽

Cited By ~ 1

Author(s):

Qu Qin-yue ◽

Wang De-yu ◽

Li Ze-qing ◽

Xu Ao-ao

Keyword(s):

Gamma Ray ◽

Gamma Ray Burst ◽

Burst Event

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Periodic black auroral patches at the dawnside dipolarization front during a substorm

Journal of Geophysical Research Atmospheres ◽

10.1029/2010ja015957 ◽

2011 ◽

Vol 116 (A5) ◽

Cited By ~ 6

Author(s):

K. Sakaguchi ◽

K. Shiokawa ◽

E. Donovan ◽

A. Nakajima ◽

Y. Hiraki ◽

...

Keyword(s):

Dipolarization Front

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Investigation of energy conversion processes and wave activity related to dipolarization fronts observed by MMS

10.5194/egusphere-egu21-11118 ◽

2021 ◽

Author(s):

Soboh Alqeeq ◽

Olivier Le Contel ◽

Patrick Canu ◽

Alessandro Retino ◽

Thomas Chust ◽

...

Keyword(s):

Energy Conversion ◽

Energy Flow ◽

Poynting Vector ◽

Wave Activity ◽

Electromagnetic Energy ◽

Particle Measurements ◽

Dipolarization Front ◽

The Earth ◽

Current Densities ◽

Scale Properties

<p>In the present work, we consider four dipolarization front (DF) events detected by MMS spacecraft in the Earth&#8217;s magnetotail during a substorm on 23rd of July 2017 between 16:05 and 17:19 UT. From their ion scale properties, we show that these four DF events embedded in fast Earthward plasma flows have classical signatures with increases of Bz, velocity and temperature and a decrease of density across the DF. We compute and compare current densities obtained from magnetic and particle measurements and analyse the Ohm&#8217;s law. Then we describe the wave activity related to these DFs. We investigate energy conversion processes via J.E calculations and estimate the importance of the electromagnetic energy flow by computing the divergence of the Poynting vector. Finally we discuss the electromagnetic energy conservation in the context of these DFs.</p>

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Rippled Electron‐Scale Structure of a Dipolarization Front

Geophysical Research Letters ◽

10.1029/2018gl080826 ◽

2018 ◽

Vol 45 (22) ◽

pp. 12,116-12,124 ◽

Cited By ~ 10

Author(s):

Dong‐Xiao Pan ◽

Yuri V. Khotyaintsev ◽

Daniel B. Graham ◽

Andris Vaivads ◽

Xu‐Zhi Zhou ◽

...

Keyword(s):

Scale Structure ◽

Dipolarization Front

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Asymmetric Reconnection Within a Flux Rope‐Type Dipolarization Front

Journal of Geophysical Research Space Physics ◽

10.1029/2019ja027296 ◽

2020 ◽

Vol 125 (1) ◽

Cited By ~ 1

Author(s):

A. T. Marshall ◽

J. L. Burch ◽

P. H. Reiff ◽

J. M. Webster ◽

R. B. Torbert ◽

...

Keyword(s):

Flux Rope ◽

Dipolarization Front

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Energy Range of Electron Rolling Pin Distribution Behind Dipolarization Front

Geophysical Research Letters ◽

10.1029/2019gl082100 ◽

2019 ◽

Vol 46 (5) ◽

pp. 2390-2398 ◽

Cited By ~ 12

Author(s):

M. J. Zhao ◽

H. S. Fu ◽

C. M. Liu ◽

Z. Z. Chen ◽

Y. Xu ◽

...

Keyword(s):

Energy Range ◽

Dipolarization Front

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Structure of the near-Earth plasma sheet during tailward flows

Annales Geophysicae ◽

10.5194/angeo-26-709-2008 ◽

2008 ◽

Vol 26 (3) ◽

pp. 709-724 ◽

Cited By ~ 2

Author(s):

A. Runov ◽

I. Voronkov ◽

Y. Asano ◽

W. Baumjohann ◽

M. Fujimoto ◽

...

Keyword(s):

Data Analysis ◽

Plasma Flow ◽

Plasma Sheet ◽

Electron Flux ◽

Neutral Sheet ◽

Magnetic Filed ◽

Current Filaments ◽

Tailward Flow ◽

Flow Burst

Abstract. A detailed analysis of successive tailward flow bursts in the near-Earth magnetotail (X~−19 RE) plasma sheet is performed on the basis of in-situ multi-point observations by the Cluster spacecraft on 15 September 2001. The tailward flows were detected during a northward IMF interval, 2.5 h after a substorm expansion. Each flow burst (Vx<300 km/s) was associated with local auroral activation. Enhancements of the parallel and anti-parallel ~1 keV electron flux were detected during the flows. The spacecraft configuration enables to monitor the neutral sheet (Bx≈0) and the level of Bx≈10–15 nT simultaneously, giving a possibility to distinguish between closed plasmoid-like structures and open NFTE-like surges. The data analysis shows NFTE-like structures and localized current filaments embedded into the tailward plasma flow. 3-D shapes of the structures were reconstructed using the four-point magnetic filed measurements and the particle data.

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