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About AGU
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Who We Are

AGU Membership Value

Empower your future today!

Ethics, Diversity & Inclusive Science

Promoting an inclusive scientific culture

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AGU Net Zero Headquarters

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Upper Atmosphere Processes and Space Weather

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Space Weather VOL.24 ISSUE 7 | 28 July 2026

The Impact of the May 2024 Geomagnetic Storm on TRISAT Orbital Decay: A TLE‐Based Analysis With a Lifetime Forecast

Nejc Kosanič + Iztok Kramberger

The 10–13 May 2024 geomagnetic storm was one of the strongest space‐weather events of Solar Cycle 25 and produced a major expansion of the thermosphere, substantially increasing...

Space Weather VOL.24 ISSUE 6 | 24 June 2026

Space Weather Disrupts Low‐Latitude Network RTK: Evidence From LSTIDs During June 2025 Geomagnetic Storm

Tong Liu + Jianghe Chen + Wenfeng Nie ...

The geomagnetic storm on 1 June 2025 generated pronounced large‐scale traveling ionospheric disturbances (LSTIDs) over China, captured by dense GNSS networks. It has been...

Journal of Geophysical Research: Space Physics VOL.131 ISSUE 7 | 28 June 2026

Disturbances in Atmospheric Electric Field and Collocated Geophysical Parameters Recorded by the MVP‐LAI System During the May 2024 Great Geomagnetic Storm

Yang‐Yi Sun + Chieh‐Hung Chen + Yongxin Gao ...

Our Earth experienced an extreme solar storm on the Mother's Day weekend from 10–12 May 2024, leading to the most severe geomagnetic storm in the past two decades. In addition...

Journal of Geophysical Research: Space Physics VOL.131 ISSUE 7 | 28 July 2026

Evolution of Atmospheric Oxygen Escape From Earth Since the Great Oxidation Event

Maria Luisa Alonso Tagle + Aline Vidotto + Caue Borlina ...

The present study reconstructs the evolution of Earth's oxygen escape into space since the Great Oxidation Event, approximately 2450 Myr ago. We use a semi‐empirical model...

Journal of Geophysical Research: Space Physics VOL.131 ISSUE 7 | 28 June 2026

Characterizing Ionospheric Variability Over Iran Using 3D Ray‐Tracing and Amateur Radio Observations

Saba Haizi Lotfabad + Alireza Mahmoudian

The ionosphere over Iran remains largely uncharacterized, despite its significant influence on high‐frequency (HF) radio‐wave propagation. In this study, three key ionospheric...