Results 61 to 70 of about 527 (105)

Geomagnetic Activity Dependence of the Auroral Electron Precipitation Spectrum at High Latitudes

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract Auroral electron forcing with energy greater than tens keVs impacts D‐region ionization in high‐latitude regions, exhibiting increased energy from midnight to dawn. This increase, known as spectrum hardening, is characterized by a higher energy at the electron‐precipitation peak flux and/or a gradual power‐law spectrum gradient.
S. Oyama, I. I. Virtanen, H. W. Tesfaw, T. Raita, L. Holappa, Y. Miyoshi, L. Cai, H. Vanhamäki, A. T. Aikio, Y. Ogawa, K. Hosokawa   +10 more
wiley   +1 more source

Statistical Survey of Arase Satellite Data Sets in Conjunction With the Finnish Riometer Network [PDF]

, 2022
During disturbed geomagnetic conditions, the energetic particles in the inner magnetosphere are known to undergo precipitation loss due to interaction with various plasma waves.
Asamura, Kazushi, Higashio, Nana, Hori, Tomoaki, Hyötylä, Miikka, Jun, C.-W., Kasahara, Satoshi, Kasahara, Yoshiya, Kazama, Yoichi, Keika, Kunihiro, Kero, Antti, Matsuda, Shoya, Mitani, Takefumi, Miyoshi, Yoshizumi, Nakamura, Satoko, Raita, Tero, Shinohara, Iku, Shiokawa, Kazuo, Takashima, Takeshi, Thomas, Neethal, Wang, Shiang-Yu, Yokota, Shoichiro   +20 more
core   +1 more source

Exploring Outer Radiation Belt Losses From the International Space Station

Geophysical Research Letters, Volume 52, Issue 13, 16 July 2025.
Abstract The precipitation of energetic electrons from the outer radiation belt plays a crucial role in regulating their flux dynamics and influencing ionospheric properties. While theoretical and numerical studies, often based on near‐equatorial spacecraft measurements, are essential for assessing the precipitation efficiency, low‐altitude ...
Xiao‐Jia Zhang, Anton Artemyev, Yuto Katoh, Yikai Hsieh, Vassilis Angelopoulos, Shoji Torii, Ryuho Kataoka, Yosui Akaike, Satoshi Nakahira   +8 more
wiley   +1 more source

The impact of energetic electron precipitation on mesospheric hydroxyl during a year of solar minimum [PDF]

, 2016
In 2008 a sequence of geomagnetic storms occurred triggered by high-speed solar wind streams from coronal holes. Improved estimates of precipitating fluxes of energetic electrons are derived from measurements on board the NOAA/POES 18 satellite using a ...
Degaard, L-K., Espy, Patrick Joseph, Hibbins, Robert Edward, Sandanger, Marit Irene, Stadsnes, Johan, Tyssøy, Hilde Nesse, Zawedde, Annet Eva   +6 more
core   +1 more source

Imprints of Intense Geomagnetic Storm on Very Low Frequency (VLF) Radio Waves Over the Mediterranean Region

Journal of Geophysical Research: Space Physics, Volume 130, Issue 7, July 2025.
Abstract The study of solar and geomagnetic activity effects on the D‐region ionosphere (60–90 km altitude) using signals from very low frequency and low frequency (VLF, 3–30 kHz) transmitters has garnered considerable attention over the past decades. This research investigates the impacts of the geomagnetic storm (GMS) of 23–24 March 2023, utilizing ...
Muyiwa P. Ajakaiye, Ben Romano, Yuval Reuveni   +2 more
wiley   +1 more source

Investigating Mid-Latitude Lower Ionospheric Responses to Energetic Electron Precipitation: A Case Study

Data
Localized ionization enhancements (LIEs) in altitude range corresponding to the D-region ionosphere, disrupting Very-Low-Frequency (VLF) signal propagation.
Aleksandra Kolarski, Vladimir A. Srećković, Zoran R. Mijić, Filip Arnaut   +3 more
doaj   +1 more source

WACCM Simulation of Polar Ozone Response to Relativistic Electron Precipitation

Geophysical Research Letters, Volume 52, Issue 11, 16 June 2025.
Abstract Various studies have been dedicated to quantifying the atmospheric chemical effects of energetic electron precipitation (EEP), but the contribution from relativistic electron precipitation (REP) was largely overlooked. Based on the precipitating fluxes estimated from Polar‐orbiting Observational Environmental Satellites, we quantify the REP ...
Yudi Pan, Wei Xu, Xudong Gu, Binbin Ni, Joshua M. Pettit, Hilde Nesse, Jingyuan Feng, Shiwei Wang, Wen Cheng, Haotian Xu, Wenchen Ma, Dongfang Zhai, Hanqing Shi, Robert A. Marshall   +13 more
wiley   +1 more source

Variations of cosmic noise absorption (CNA) by energetic electron precipitation (EEP) and changes of the auroral morphology [PDF]

, 2019
The Tenth Symposium on Polar Science/Ordinary sessions: [OS] Space and upper atmospheric sciences, Wed. 4 Dec.
Hiroshi Miyaoka, Keisuke Hosokawa, Ryuho Kataoka, Satoshi Kurita, Shin-ichiro Oyama, Taishiro Miyamoto, Tero Raita, Yasunobu Ogawa, Yoshizumi Miyoshi   +8 more
core   +1 more source

Atmospheric Ionization Caused by EMIC‐Wave Driven Energetic Electron Precipitation at Auroral Latitude

Geophysical Research Letters, Volume 52, Issue 11, 16 June 2025.
Abstract Electromagnetic ion cyclotron (EMIC) waves are recognized as one of the primary drivers of energetic electron precipitation (EEP) into the Earth's atmosphere. A problematic discrepancy has remained between the occurrence frequency of waves in magnetic local time (MLT) and the resultant precipitation observed by satellites.
Kiyoka Murase, Ryuho Kataoka, Yoshimasa Tanaka, Takanori Nishiyama, Taishi Hashimoto, Kaoru Sato   +5 more
wiley   +1 more source

Self‐Assembling Cracks to Fabricate Antireflective Antifogging Metasurfaces

Advanced Optical Materials, Volume 13, Issue 16, June 6, 2025.
A multifunctional optical device combining antireflective and photothermal antifogging properties is developed by leveraging crack formation in colloidal films. Plasmonic nanoparticle arrays enable localized heating under illumination, while a mesoporous silica coating provides antireflection and water repellency.
Fanny Thorimbert, Maria Cristina Rivadeneira, Marco Faustini   +2 more
wiley   +1 more source