Results 21 to 30 of about 26,415 (203)

Determining ULF Wave Contributions to Geomagnetically Induced Currents: The Important Role of Sampling Rate

Space Weather, 2023
Past studies found that large‐amplitude geomagnetically induced current (GIC) related to magnetospheric Ultra Low Frequency (ULF) waves tend to be associated with periods >120 s at magnetic latitudes >60°, with comparatively (a) smaller GIC amplitudes at
Michael D. Hartinger, Xueling Shi, Craig J. Rodger, Ikuko Fujii, E. Joshua Rigler, Karl Kappler, Jürgen Matzka, Jeffrey J. Love, Joseph B. H. Baker, Daniel H. Mac Manus, Michael Dalzell, Tanja Petersen   +11 more
doaj   +1 more source

Modeling radiation belt radial diffusion in ULF wave fields: 1. Quantifying ULF wave power at geosynchronous orbit in observations and in global MHD model [PDF]

, 2010
[1] To provide critical ULF wave field information for radial diffusion studies in the radiation belts, we quantify ULF wave power (f = 0.5–8.3 mHz) in GOES observations and magnetic field predictions from a global magnetospheric model.
Huang, Chia-Lin L., Hughes, W. Jeffrey, Singer, Howard J., Spence, Harlan E.   +3 more
core   +2 more sources

Modulation of chorus intensity by ULF waves deep in the inner magnetosphere [PDF]

, 2016
Previous studies have shown that chorus wave intensity can be modulated by Pc4-Pc5 compressional ULF waves. In this study, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The
Chan, Anthony A., Chen, Lunjin, Claudepierre, Seth G., Dai, Lei, Reeves, G.D., Soto-Chavez, A.R., Xia, Zhiyang   +6 more
core   +1 more source

Observation of Ultra-Low-Frequency Wave Effects in Possible Association with the Fukushima Earthquake on 21 November 2016, and Lithosphere–Atmosphere–Ionosphere Coupling

Atmosphere, 2023
The study presents seismogenic ULF (ultra-low-frequency) wave effects, as observed at our own new magnetic observatory at Asahi (geographic coordinates: 35.770° N, 140.695° E) in Chiba Prefecture.
Masashi Hayakawa, Alexander Schekotov, Hiroki Yamaguchi, Yasuhide Hobara   +3 more
doaj   +1 more source

Modeling radiation belt radial diffusion in ULF wave fields: 2. Estimating rates of radial diffusion using combined MHD and particle codes [PDF]

, 2010
[1] Quantifying radial transport of radiation belt electrons in ULF wave fields is essential for understanding the variability of the trapped relativistic electrons.
Elkington, Scot R., Huang, Chia-Lin L., Hudson, Mary K., Spence, Harlan E.   +3 more
core   +2 more sources

Chapman Conference on Magnetospheric ULF Waves [PDF]

Eos, Transactions American Geophysical Union, 2005
Waves in the ultra‐low‐frequency (ULF) band (periods of 1 to 1000 s) are a permanent feature in the region called the magnetosphere, where the behavior of charged particles is influenced by the Earth's intrinsic magnetic field. These waves transport momentum and energy from the solar wind to the magnetosphere and farther down to the ionosphere.
K. Takahashi, P. J. Chi, R. E. Denton, T. K. Yeoman, V. A. Pilipenko   +4 more
openaire   +1 more source

Determining the mode, frequency, and azimuthal wave number of ULF waves during a HSS and moderate geomagnetic storm [PDF]

, 2018
Ultra-low frequency (ULF) waves play a fundamental role in the dynamics of the inner-magnetosphere and outer radiation belt during geomagnetic storms.
Ali, Anderson, Aryan, Baker, Blake, Brautigam, Brautigam, Brito, Burch, Burnham, Carpenter, Cenko, Chisham, Claudepierre, Claudepierre, Degeling, Degeling, Denton, Dungey, Elkington, Elkington, Friedel, Goldstein, Gruber, Halford, Hartinger, Hasegawa, Hasegawa, Huppenkothen, Inglis, Inglis, Kalmoni, Kataoka, Kepko, King, Le, Lee, Lin, Liu, Loto'aniu, Mann, Mann, Mann, Mathie, Mauk, McHardy, Min, Murphy, Murphy, Murphy, Nita, Ozeke, Ozeke, Ozeke, Ozeke, Ozeke, Pahud, Plaschke, Press, Rae, Rae, Rae, Ren, Roux, Russell, Sarris, Schulz, Shprits, Shue, Sibeck, Southwood, Southwood, Southwood, Takahashi, Takahashi, Takahashi, Takahashi, Tan, Turner, Vaughan, Vaughan, Walt, Waters, Yeoman, Zhou, Zong   +85 more
core   +2 more sources

On the Close Correspondence Between Storm Time ULF Wave Power and the POES VLF Chorus Wave Amplitude Proxy

Geophysical Research Letters, 2019
Ground‐based Pc5 ultralow frequency (ULF) wave power in multiple ground‐based meridians is compared to the very low frequency (VLF) wave amplitude proxy, derived from Polar Operational Environmental Satellite (POES) precipitation, for the 33 storms ...
Stavros Dimitrakoudis, Ian R. Mann
doaj   +1 more source

Letter to the editor
CUTLASS observations of a high-m ULF wave and its consequences for the DOPE HF Doppler sounder [PDF]

Annales Geophysicae, 1999
The CUTLASS (Co-operative UK Twin Located Auroral Sounding System) Finland HF radar, whilst operating in a high spatial and temporal resolution mode, has measured the ionospheric signature of a naturally occurring ULF wave in scatter artificially ...
D. M. Wright, D. M. Wright, T. K. Yeoman
doaj   +1 more source

ULF waves in Ganymede's upstream magnetosphere [PDF]

Annales Geophysicae, 2013
Abstract. Ganymede's mini-magnetosphere, embedded in Jupiter's larger one, sustains ULF (ultra-low frequency) waves that are analyzed here using data from two Galileo flybys that penetrate deeply into the upstream closed field line region. The magnetometer data are used to identify field line resonances, magnetopause waves and ion cyclotron waves.
M. Volwerk, X. Jia, C. Paranicas, W. S. Kurth, M. G. Kivelson, K. K. Khurana   +5 more
openaire   +3 more sources