Results 21 to 30 of about 154 (118)

Interaction between Equatorial Plasma Bubbles and a Medium-Scale Traveling Ionospheric Disturbance, observed by OI 630 nm airglow imaging at Bom Jesus de Lapa, Brazil

Earth and Planetary Physics, 2021
OI 630.0 nm airglow observations, from a new observatory at Bom Jesus de Lapa, were used to study the interaction between EPBs (Equatorial Plasma Bubbles) and the MSTID (Medium-Scale Traveling Ionospheric Disturbance) over the Northeast region in Brazil.
Cristiano Max Wrasse, Cosme Alexandre Oliveira Barros Figueiredo, Diego Barros, Hisao Takahashi, Alexander José Carrasco, Luiz Fillip Rodrigues Vital, Láysa Cristina Araujo Resende, Fábio Egito, Geângelo de Matos Rosa, Antonio Hélder Rodrigues Sampaio   +9 more
doaj   +1 more source

Ionospheric Disturbances Triggered by the Mw7.6 Earthquake off the Coast of El Salvador on 13 January 2001

Terrestrial, Atmospheric and Oceanic Sciences, 2006
A network of five ground-based receivers of the global positioning sys- tem (GPS) was use to detect seismo-ionospheric disturbances in the total elec- tron content (TEC) triggered by the 13 January 2001 El Salvador Mw 7.6 earthquake.
Ting-Kuo Jung, Jann-Yenq Liu, Ho-Fang Tsai, Bor-Shouh Huang, Cheng-Horng Lin, Shui-Beih Yu, Yih-Shiung Yeh   +6 more
doaj   +1 more source

Origin of the Ionospheric Changes Immediately Before the 15 January 2022 Eruption of the Hunga-Tonga Hunga-Ha’apai Submarine Volcano

Atmosphere
Near-field ionospheric total electron content records before and after the 15 January 2022 eruption of the Hunga-Tonga Hunga-Ha’apai submarine volcano were studied using GNSS total electron content data.
Kosuke Heki
doaj   +1 more source

On the Ionospheric Disturbances in New Zealand and Australia Following the Eruption of the Hunga Tonga‐Hunga Ha'apai Volcano on 15 January 2022

Space Weather, 2023
The Hunga Tonga‐Hunga Ha'apai (hereafter HTHH) submarine volcano erupted at 04:14:45 UT on 15 January 2022, causing ionospheric disturbances. This paper uses carrier phase observations from GNSS tracking stations in New Zealand and Australia to calculate
Peng Chen, Mingzhu Xiong, Rong Wang, Yibin Yao, Fucai Tang, Hao Chen, Liangcai Qiu   +6 more
doaj   +1 more source

Investigation of Acoustic Waves in the Ionosphere Generated by a Deep Convection System Using Distributed Networks of GPS Receivers and Numerical Modeling

Geophysical Research Letters, 2018
Acoustic waves generated in the lower atmosphere may become an important source of variability in the upper atmosphere. Although excited with small amplitudes compared to gravity waves, they are minimally subjected to viscous dissipation and may reach ...
Irfan Azeem, Richard L. Walterscheid, Geoff Crowley   +2 more
doaj   +1 more source

ESTIMATED INFLUENCE OF STRATOSPHERIC ACTIVITY ON THE IONOSPHERE ACCORDING TO MEASUREMENTS WITH ISTP SB RAS TOOLS

Solar-Terrestrial Physics, 2021
We present the results of a comprehensive study of the manifestation of wave activity with periods of internal gravity waves (IGW) in various regions of the atmosphere: in the stratosphere, upper mesosphere, and in the F2-region of the ionosphere.
M.V. Tolstikov, K.G. Ratovsky, I.V. Medvedeva, D.S. Khabituev   +3 more
doaj   +1 more source

Successively Equatorward Propagating Ionospheric Acoustic Waves and Possible Mechanisms Following the Mw 7.5 Earthquake in Noto, Japan, on 1 January 2024

Space Weather
On 1 January 2024, the Mw 7.5 Noto Peninsula earthquake in Japan generated ionospheric disturbances detected via dense GNSS networks. Significant coseismic acoustic waves emerged ∼8 min post‐event, exhibiting 0.3 TECU amplitudes, 2–8 min periods, and ∼1 ...
Bing Zhang, Tong Liu, Xueshang Feng, Guochang Xu   +3 more
doaj   +1 more source

Ionospheric response to magnetar flare: signature of SGR J1550–5418 on coherent ionospheric Doppler radar [PDF]

Annales Geophysicae, 2017
This paper presents observational evidence of frequent ionospheric perturbations caused by the magnetar flare of the source SGR J1550–5418, which took place on 22 January 2009.
A. Mahrous
doaj   +1 more source

Ionospheric Disturbances Over the Indian Sector During 8 September 2017 Geomagnetic Storm: Plasma Structuring and Propagation

Space Weather, 2021
The series of X and M class flares and associated coronal mass ejections that occurred on the first days of September 2017 induced significant perturbations on the low‐latitude ionospheric electrodynamics.
L. Alfonsi, C. Cesaroni, L. Spogli, M. Regi, A. Paul, S. Ray, S. Lepidi, D. Di Mauro, H. Haralambous, C. Oikonomou, P. R. Shreedevi, A. K. Sinha   +11 more
doaj   +1 more source

Geomagnetic Storm Effect on F₂-Region Ionosphere during 2012 at Low- and Mid-Latitude-Latitude Stations in the Southern Hemisphere

Atmosphere, 2022
The ionospheric effects of six intense geomagnetic storms with Dst index ≤ −100 nT that occurred in 2012 were studied at a low-latitude station, Darwin (Geomagnetic coordinates, 21.96° S, 202.84° E), a low-mid-latitude station, Townsville (28.95° S, 220 ...
Edwin A. Kumar, Sushil Kumar
doaj   +1 more source