Results 41 to 50 of about 449 (162)

Evidence for Deep Ingression of the Midlatitude MSTID Into As Low as ~3.5° Magnetic Latitude [PDF]

Journal of Geophysical Research: Space Physics, 2019
An observational evidence of medium‐scale traveling ionospheric disturbances (MSTIDs) reaching to magnetic latitude as low as ~3.5° over the Indian sector is provided for the first time based on OI 630‐nm airglow imaging observation from a low‐latitude station, Gadanki (13.5°N, 79.2°E; 6.6° magnetic latitude), on 12 January 2016 ...
M. Sivakandan, D. Chakrabarty, T. K. Ramkumar, A. Guharay, A. Taori, N. Parihar   +5 more
openaire   +1 more source

Dynamic Evolution of a Storm‐Time “Super‐EPB” Event Over China on the Magnetically Disturbed Night of 01 December 2023

Space Weather, Volume 24, Issue 10, October 2026.
Abstract This paper investigates the dynamic evolution of a storm‐time “Super‐EPB” event over China on 1 December 2023 (Kp ≤ 7, SYM/H ≥ −130 nT) using multi‐instrument observations. Occurring near sunset as the IMF‐Bz abruptly turned southward, with auroral extension to midlatitudes, the “Super‐EPB” extended to 40°N with an apex height of ∼2,460 km ...
Longchang Sun, Jiyao Xu, Wei Yuan, Yajun Zhu, Maosheng He, Wenjie Sun, Guozhu Li, Jiaojiao Zhang, Hong Gao, Aibin Zhang, Weijun Liu, Guojun Wang   +11 more
wiley   +1 more source

Multievent Analysis of Oscillatory Motion of Medium‐Scale Traveling Ionospheric Disturbances Observed by a 630‐nm Airglow Imager Over Tromsø [PDF]

, 2020
We present a comprehensive investigation on the propagation characteristics of duskside medium‐scale traveling ionospheric disturbances (MSTIDs) using 630.0‐nm airglow emissions over Tromsø (69.6°N, 19.2°E; magnetic latitude: 66.7°N).
Shiokawa, K., Y. Otsuka, Otsuka, Y., S. Oyama, Yadav, Sneha, Sneha Yadav, K. Shiokawa, Oyama, S., 101160, 101161, 101162, 101159   +11 more
core   +1 more source

The Persistent Ionospheric Responses Over Japan After the Impact of the 2011 Tohoku Earthquake

Space Weather, 2020
In this study, we report the persistent impacts of the 2011 Tohoku earthquake/tsunami on the ionosphere using the ground‐based Global Navigation Satellite System and FORMOSAT‐3/COSMIC total electron content.
Min‐Yang Chou, Iurii Cherniak, Charles C.H. Lin, N.M. Pedatella   +3 more
doaj   +1 more source

Connections Between Stratospheric GWs, the Polar Vortex, and MSTIDs From Longitudinally Distinct Regions During Nine Arctic Winters

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Midlatitude medium‐scale traveling ionospheric disturbances (MSTIDs) are a common source of ionospheric variability that may influence GNSS‐based positioning and can disrupt HF‐communication channels. Here, we present a comprehensive nine‐winter analysis (2014–2023) that establishes a robust connection between stratospheric gravity waves (GWs)
S. Derghazarian, L. Goncharenko, V. L. Harvey, S.‐R. Zhang, A. Coster, E. Becker, G. Kwon   +6 more
wiley   +1 more source

Characteristics of Nighttime Medium‐Scale Traveling Ionospheric Disturbances: Longitudinal Comparison of Their Seasonal and Local Time Variations

Space Weather
This study presents a statistical analysis of the occurrence rate of midlatitude nighttime medium scale traveling ionospheric disturbances (MSTIDs) that were detected in Swarm plasma density measurements from 2014 to 2023.
Zama T. Katamzi‐Joseph, John Bosco Habarulema, Yuichi Otsuka, Tshimangadzo M. Matamba, Amoré E. Nel   +4 more
doaj   +1 more source

Medium‐Scale Traveling Ionospheric Disturbances Induced by Secondary Gravity Waves Associated With Record‐Breaking Heavy Rainfall in August 2021 Over Kyushu, Japan

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract This study reconstructs a multistep gravity wave (GW) pathway, from the generation of primary GWs by deep convection in the troposphere to the generation of secondary GWs that drive semi‐concentric medium‐scale traveling ionospheric disturbances (MSTIDs) in the ionosphere, during the record‐breaking heavy rainfall over Kyushu, Japan, in August
Masaru Kogure, In‐Sun Song, Byeong‐Gwon Song, Huixin Liu, Michi Nishioka, Septi Perwitasari, Hosik Kam, Junseok Hong   +7 more
wiley   +1 more source

The Impacts of Tropospheric Gravity Wave‐Generated MSTIDs on Skywaves at Mid‐latitude North American Sector Observed and Modeled Using SuperDARN HF Radars

Radio Science, Volume 61, Issue 9, September 2026.
Abstract Trans‐ionospheric high frequency (HF: 3–30 MHz) response to atmospheric gravity waves (GWs) is studied in the middle‐latitude ionosphere in relation to thunderstorm activity. SuperDARN HF radar observations are compared against the model simulations to quantify the impact of GW‐generated medium‐scale traveling ionospheric disturbances (MSTID ...
S. Chakraborty, P. A. Inchin, S. Debchoudhury, B. Bergsson, M. Zettergren, J. M. Ruohoniemi   +5 more
wiley   +1 more source

First Comprehensive Study of MSTID Generation and Propagation Characteristics in Iran

Journal of Geophysical Research: Space Physics
AbstractTo investigate medium‐scale TID (MSTIDs) at mid‐latitudes across Iran, TEC data obtained from a dense ground‐based GNSS receiver during the 7 months from May–November 2021 were analyzed. To remove the diurnal variability of the TEC, an 8th‐order Butterworth bandpass filter was applied to the data. Then, two‐dimensional TEC maps of the detrended
M. Vazifehkhah Hafteh, A. Mahmoudian
openaire   +3 more sources

Studies of medium scale travelling ionospheric disturbances using TIGER SuperDARN radar sea echo observations [PDF]

Annales Geophysicae, 2004
Seasonal and diurnal variations in the direction of propagation of medium-scale travelling ionospheric disturbances (MSTIDs) have been investigated by analyzing sea echo returns detected by the TIGER SuperDARN radar located in Tasmania (43.4° S, 147.
L.-S. He, L.-S. He, P. L. Dyson, M. L. Parkinson, W. Wan   +4 more
doaj   +1 more source