Tag

Solar Activity

All articles tagged with #solar activity

space-weather24 days ago•30 min saved

Earthward CME from M1.9 flare prompts August 2 geomagnetic watch

A long-duration M1.9 solar flare from Active Region 4492 on July 30, with an associated filament eruption, produced an Earth-directed partial-halo CME and a minor solar radiation storm. WSA-Enlil model runs place the CME’s arrival at Earth around August 2, with NOAA’s Space Weather Prediction Center forecasting G1–G2 (Minor–Moderate) geomagnetic storm conditions. Solar wind parameters have been mostly nominal, but disturbances from July 26–27 CMEs and the July 30 CME could arrive; increased drag, potential voltage alarms on power systems, spacecraft orientation corrections, and radio fade are possible, with auroras potentially visible as far south as New York and Idaho under favorable conditions.

via The Watchers - Watching the world evolve and transform|

#aurora #coronal-mass-ejection #geomagnetic-storm

space-weather1 month ago•32 min saved

X1.1 solar flare after M5.8 storm warning raises CME-space-weather prospect

A moderate M5.8 solar flare from AR 4475 on June 29 prompted an S1 solar radiation storm warning (issued 16:00 UTC, canceled 16:36 UTC) with no CME detected at that time, though Western-limb location kept Earth at risk for energetic particles. Later, an Earth-facing X1.1 flare from AR 4479 near the solar disk center at 20:50 UTC produced a strong radio blackout (R3) and emitted Type II and IV radio bursts, with analysts awaiting coronagraph data to confirm any Earth-directed CME. Space‑weather conditions were quiet for now, but CME activity from later flares could bring unsettled to active conditions on June 30 into July 1, potentially triggering minor geomagnetic activity on approach of any CME.

via The Watchers - Watching the world evolve and transform|

#cme #solar-activity #solar-radiation-storm

space3 months ago•5 min saved

Solar Activity Quickens Space Debris Decay in Low Earth Orbit

A 36-year study of 17 debris objects in low Earth orbit shows that when solar activity rises to a certain level, heating of the thermosphere expands the atmosphere and increases drag, causing debris to lose altitude faster. The researchers identify a transition threshold near two-thirds of solar maximum and note stronger extreme ultraviolet emissions around solar peaks, with practical implications for satellite operators who may need more frequent orbit corrections and greater fuel reserves during active solar phases.

via The Daily Galaxy|

#low-earth-orbit #orbital-decay #solar-activity

science7 months ago•42 min saved

Northern Lights May Dazzle 10 States Across the U.S.

During periods of heightened solar activity, the aurora borealis could be visible from ten U.S. states on clear, dark nights; check local aurora forecasts and cloud-free skies for the best viewing chances.

via Forbes|

#aurora #northern-lights #science

space7 months ago•5 min saved

Sun's 94-Day 'Monster' Active Region Unleashed Earth-Impacting Space Weather

A 94-day observation of solar active region NOAA 13664 by Solar Orbiter and SDO captured its evolving magnetic field, revealing the Sun's strongest geomagnetic storms in over two decades and causing auroras visible as far south as Switzerland along with disruptions to satellites and railway signaling; the study, published in Astronomy & Astrophysics, marks a major advance in understanding space weather.

via The Daily Galaxy|

#geomagnetic-storms #noaa-13664 #solar-activity

science7 months ago•4 min saved

Exclusive Data Reveals New Insights into the Sun

A groundbreaking collaboration between the ground-based DKIST telescope and the space-based Solar Orbiter has provided new insights into the Sun's activity, including the discovery of tiny structures called 'campfires' and detailed observations of the Sun's magnetic fields, advancing our understanding of solar phenomena and their impact on Earth.

via Indian Defence Review|

#campfires #dkist #science

science7 months ago•0 min saved

Earth Faces Major Solar Storms and Magnetic Activity in Early January 2026

NOAA has issued G1-G2 watches for January 3-4 due to expected CMEs from solar activity, which may cause minor to moderate geomagnetic storms, affecting HF radio and navigation signals.

via NOAA Space Weather Prediction Center (.gov)|

#cme #geomagnetic-storm #noaa

science8 months ago•4 min saved

NASA's Parker Probe Reveals New Details of the Sun's Dynamic Atmosphere

NASA's Parker Solar Probe captured unprecedented close-up images of the Sun's magnetic activity during its 22nd flyby, revealing new details about magnetic 'tadpoles', the tearing of the heliospheric current sheet, and the formation of magnetic in/out pairs, advancing our understanding of solar phenomena.

via Indian Defence Review|

#heliospheric-current-sheet #magnetic-structures #parker-solar-probe

science8 months ago•5 min saved

NASA's Parker Solar Probe Reveals Solar Wind Dynamics and Sun's Magnetic Boundary

NASA's Parker Solar Probe captured detailed images of solar material doing a 'U-turn' after eruptions, revealing how the sun recycles its magnetic energy and material, which could improve space weather forecasting.

via Space|

#nasa #parker-solar-probe #science

science8 months ago•0 min saved

Solar Activity Alert: Sunspot, Solar Flare, and Geomagnetic Storm Warnings

NOAA has issued a G3 warning due to effects from a coronal hole high-speed stream, impacting radio communications and navigation, with conditions expected to persist into Wednesday evening, December 3, 2025.

via National Oceanic and Atmospheric Administration (NOAA) (.gov)|

#coronal-hole #g3-warning #noaa

science8 months ago•2 min saved

Massive Solar Flare Triggers Geomagnetic Storm and Aurora Alerts

A powerful X1.9 solar flare from sunspot AR4299 caused radio blackouts in Australia and Southeast Asia, with further solar activity expected from the larger, more complex sunspot AR4294, potentially leading to additional flares and minor geomagnetic storms in the coming days.

via The Daily Galaxy|

#geomagnetic-storm #radio-blackout #science

science8 months ago•0 min saved

Geomagnetic Storm Watch Issued Amid Solar Flare Activity

NOAA has issued a G2 (Moderate) geomagnetic storm watch for December 3-4 due to a coronal mass ejection associated with an X1.9 solar flare, which may impact radio communications and navigation systems.

via SpaceWeather.gov|

#cme #geomagnetic-storm #noaa

science8 months ago•5 min saved

India’s Aditya-L1 to Observe Sun’s Peak Activity in 2026

India's Aditya-L1 solar mission is poised to observe the Sun during its maximum activity cycle in 2026, a period marked by increased solar storms and coronal mass ejections (CMEs). The mission aims to study these phenomena to better understand solar behavior and improve space weather forecasting, which is crucial for protecting Earth's infrastructure and satellites. Aditya-L1's unique instrumentation allows continuous observation of the Sun's corona, providing valuable data during this intense solar period.

via BBC|

#aditya-l1 #cmes #science

science9 months ago•2 min saved

Northern Lights Illuminate U.S. Skies Amid Geomagnetic Storm

The Northern Lights have been visible across the U.S. and parts of the world due to a G4 geomagnetic storm caused by solar eruptions, creating spectacular displays in the sky, including in England, China, Germany, and various U.S. states, with the storm being one of the strongest in decades.

via Axios|

#aurora-borealis #geomagnetic-storm #northern-lights

science9 months ago•1 min saved

Severe Space Weather Alert: Solar Flare and Geomagnetic Storms Impacting Earth

NOAA has issued geomagnetic storm watches from November 11 to 13 due to coronal mass ejections (CMEs) impacting Earth, with storm levels ranging from minor to moderate, and ongoing analysis to refine forecasts.

via NOAA Space Weather Prediction Center (.gov)|

#cme #geomagnetic-storm #noaa