Results 71 to 80 of about 86,535 (196)

Validation of ShakeMaps Created From Global Navigation Satellite System (GNSS) Velocities

Earthquake Spectra, Volume 42, Issue 3, August 2026.
Ground velocity observations generated through a time difference of Global Navigation Satellite Systems (GNSS) phase observables and orbits have been shown to be comparable to seismic recordings without clipping during intense ground motions. Computing GNSS velocities is also computationally scalable and increases the density of ground motion ...
Jensen V. DeGrande, Brendan W. Crowell
wiley   +1 more source

On the Generation of Pre‐Sunrise Equatorial Plasma Bubbles in Southeast Asia During the Geomagnetic Storm of May 2024

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract A set of fresh Equatorial Plasma Bubbles (EPBs) formed during pre‐sunrise hours in the Southeast Asian sector amid the recovery phase of May 2024 geomagnetic storm. They offered new insights into their formation mechanism. This study used Total Electron Content (TEC) and Rate of TEC Index maps over Indonesia, along with ionosondes in Thailand ...
Sri Ekawati, Prayitno Abadi, Takuya Sori, Rezy Pradipta, Ihsan Naufal Muafiry, Teguh Nugraha Pratama, Agri Faturahman, Noersomadi, Febrylian Fahmi Chabibi, Punyawi Jamjareegulgarn   +9 more
wiley   +1 more source

D region HF radar echoes associated with energetic particle precipitation and pulsating aurora [PDF]

, 2008
Milan et al. (2001) identified a class of narrow, slow-moving HF radar backscatter echoes which originate between altitudes of 80 and 100 km, the ionospheric D- and lower E-regions.
Milan, S.E., S. E. Milan, K. Hosokawa, Yamagishi, H., N. Sato, Lester, M., F. Honary, Hosokawa, K., Honary, F., Sato, N., M. Lester, H. Yamagishi   +11 more
core   +2 more sources

Leveraging ROTI map derived from Indonesian GNSS receiver network for advancing study of Equatorial Plasma Bubble in Southeast/East Asia

Earth and Planetary Physics
This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble (EPB) studies in Southeast and East Asia, as ionospheric irregularities within EPB can disrupt GNSS signals and degrade positioning accuracy.
Prayitno Abadi, Ihsan N. Muafiry, Teguh N. Pratama, Angga Y. Putra, Suraina, Gatot H. Pramono, Sidik T. Wibowo, Febrylian F. Chabibi, Umar A. Ahmad, Wildan P. Tresna, Asnawi   +10 more
doaj   +1 more source

MMS Observations of Multi‐Species Wave‐Particle Interactions and Rapid Foreshock Evolution

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The ion foreshock is the region upstream of Earth's bow shock where magnetic field lines connect to the quasi‐parallel shock surface. Within this region, there exist a variety of backstreaming ion populations from the shock ramp that can generate ultra‐low frequency (ULF) waves through wave‐particle interactions. In this work, we use data from
Guan Le, Xochitl Blanco‐Cano, Yuxi Chen, Megha Pandya, Gangkai Poh, Hanying Wei, Scott Boardsen, Poshan Belbase, Christopher T. Russell, Daniel J. Gershman, Ian J. Cohen, S. A. Fuselier   +11 more
wiley   +1 more source

Multiscale Modeling of Ionospheric Irregularities [PDF]

, 2014
Abstract : Developed novel multi-nesting, time splitting and implicit relaxation techniques for coupled three-dimensional mesoscale/microscale ionospheric dynamics; resolved secondary Rayleigh-Taylor instabilities and characterized turbulent dynamics of plasma bubbles/ionospheric layers.
openaire   +1 more source

An observing system simulation experiment for FORMOSAT-5/AIP probing topside ionospheric plasma irregularities by using DEMETER/IAP

Terrestrial, Atmospheric and Oceanic Sciences, 2017
The ion density probed by IAP (Instrument d’Analyse du Plasma) on board the DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite is used to find whether the science payload of Advanced Ionospheric Probe (AIP) on
Jann-Yenq Liu, Yang-Yi Sun, Chi-Kuang Chao, Shih-Ping Chen, Michel Parrot   +4 more
doaj   +1 more source

Plasma diagnostic experiments on board of the Brazilian scientific microsatellite SACI-1 [PDF]

Geofísica Internacional, 2000
A set of three plasma diagnostic experiments, known as PLASMEX, are planned to investigate ionospheric plasma bubbles in the ionospheric region. We propose to measure the density, temperature and spectral distribution of irregularities of plasma using (1)
Koh-Ichiro Oyama, J.H.A. Sobral, M.A. Abdu, P. Muralikrishna   +3 more
doaj  

Efficient Usage of Dense GNSS Networks in Central Europe for the Visualization and Investigation of Ionospheric TEC Variations

Sensors, 2017
The technique of the orthogonal projection of ionosphere electronic content variations for mapping total electron content (TEC) allows us to visualize ionospheric irregularities.
Grzegorz Nykiel, Yevgen M. Zanimonskiy, Yuri M. Yampolski, Mariusz Figurski   +3 more
doaj   +1 more source

Correction [to “Ionospheric irregularities”] [PDF]

Reviews of Geophysics, 1981
B. G. Fejer, M. C. Kelley
openaire   +1 more source