Results 291 to 300 of about 211,583 (346)

Gamma-Ray Burst - Supernova Relation

, 1999
B. Paczyński
openalex   +2 more sources

Ionospheric D Region: Characteristics Near Dawn and Dusk

Journal of Geophysical Research: Space Physics, Volume 130, Issue 4, April 2025.
Abstract The characteristics of very low frequency (VLF) radio wave propagation in the Earth‐ionosphere waveguide are determined particularly through dawn and dusk using phase and amplitude measurements of man‐made signals propagating below the ionospheric D region. For the first time variations of “Wait” height and sharpness parameters, H' and β, have
Neil R. Thomson, Mark A. Clilverd, Craig J. Rodger   +2 more
wiley   +1 more source

A delayed 400 GeV photon from GRB 221009A and implication on the intergalactic magnetic field. [PDF]

Nat Commun
Xia ZQ, Wang Y, Yuan Q, Fan YZ.
europepmc   +1 more source

Correlation Between the Delay and Rise Time of VLF/LF Amplitudes During 20 Solar X‐Ray Flares Observed in February 2014 at Mid‐Latitude

Radio Science, Volume 60, Issue 4, April 2025.
Abstract During daylight hours, the concentration of electrons in the ionosphere can be amplified by solar flares, which may subsequently influence the propagation of radio waves. Previous research on Very Low Frequency (VLF) signals focused on X‐class and M‐class flares.
Y. Liu, M. Füllekrug
wiley   +1 more source

Beta-gamma phase-amplitude coupling of scalp electroencephalography during walking preparation in Parkinson's disease differs depending on the freezing of gait. [PDF]

Front Hum Neurosci
Kimoto Y, Tani N, Emura T, Matsuhashi T, Yamamoto T, Fujita Y, Oshino S, Hosomi K, Khoo HM, Miura S, Fujinaga T, Yanagisawa T, Kishima H.   +12 more
europepmc   +1 more source

Development of Intra‐Rift Basins During Stress Field Change in the Central Upper Rhine Graben (SW Germany)

Tectonics, Volume 44, Issue 4, April 2025.
Abstract The essentially non‐magmatic continental rift system of the Upper Rhine Graben (URG) is segmented and characterized by intra‐rift sub‐basins that exhibit NE to NW trends suggesting complex basin development during rifting. Structural modeling and analyses of an about 40 km2 3D seismic survey from the northern part of the central URG segment ...
Florian Bauer, Jens C. Grimmer, Lars Houpt, Thomas Hertweck, Eva Schill   +4 more
wiley   +1 more source

Fast neutron generation with few-cycle, relativistic laser pulses at 1 Hz repetition rate. [PDF]

Sci Rep
Osvay K, Singh PK, Varmazyar P, Füle M, Gilinger T, Kis B, Lehotai L, Nagy B, Stuhl L, Elekes Z, Halász Z, Korkulu Z, Kuti I, Biró B, Fenyvesi A, Fülöp Z, Csedreki L, Dombrádi Z, Bembibre A, Benlliure J, Peñas J, Börzsönyi A, Csontos J, Farkas A, Mohacsi A, Somoskői T, Szabó G, Tóth S.   +27 more
europepmc   +1 more source

Energetic Compact Strokes as the Major Source of Downward Terrestrial Gamma‐Ray Flashes in Winter Thunderstorms

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract Terrestrial gamma‐ray flashes (TGFs) are short bursts of intense gamma radiation associated with lightning discharges. Although thousands of TGFs have been observed from space, TGFs detected at ground level, known as downward TGFs, are still very limited, and their relationship with lightning discharge processes remains elusive. Here we report
Ting Wu, David M. Smith, Yuuki Wada, Kazuhiro Nakazawa, Manari Oguchi, Masashi Kamogawa, Tomoyuki Suzuki, Qingliu Yang, Daohong Wang   +8 more
wiley   +1 more source

Generalizing the similitude approach for laboratory astrophysics through equivalence symmetries for the example of radiative waves. [PDF]

Sci Rep
Tranchant V, Charpentier N, Van Box Som L, Ciardi A, Falize É.   +4 more
europepmc   +1 more source

An Upward Multi‐Pulse TGF Involved With Two Thunderstorm Cells

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 6, 28 March 2025.
Abstract Gamma rays associated with lightning discharges are evidence of ∼30 ${\sim} 30$ MeV electrons acceleration by electric field in the atmosphere. However, the acceleration site and actual condition of it are not yet identified. On 30 December 2021, a terrestrial gamma ray flash (TGF) with five (or six) consecutive pulses were detected by our ...
K. Nakazawa, M. Oguchi, T. Wu, Y. Wada, K. Okuma, D. Wang, Y. Tsuji, Y. Omiya, M. Ando, T. Enoto, M. Tsurumi, J. Kataoka, T. Kanda, R. Iwashita, N. Koshikawa, T. Shinoda, G. Diniz, Y. Ikkatai   +17 more
wiley   +1 more source