US Edition40 Years of Data Reveals Sun's Interior During Quiet Phases
Analysis of 40 years of helioseismology data reveals subtle internal changes in the Sun during four solar minima, with the 2008–2009 minimum showing the strongest helium signal and fastest sound speed.
- The report on March 3, 2026, from researchers at the University of Birmingham and Yale University shows that more than 40 years of BiSON data reveal the Sun’s internal structure shifts between solar cycle minima.
- Using BiSON's six ground telescopes, the researchers compared four successive solar minima spanning cycles 21–25 by analysing trapped sound waves inside the Sun.
- The 2008–2009 minimum, one of the quietest and longest on record, revealed a stronger helium glitch and faster sound speeds, implying higher gas pressures, temperatures, and weaker magnetic fields.
- Researchers say the results could improve long-term solar forecasting and monitoring as solar models used for forecasting must reproduce 2008–2009 shifts to capture key physics and assess space-weather impacts on infrastructure.
- Shifts during deep minima may influence how the next solar cycle builds momentum, and techniques could be applied to other Sun-like stars with ESA's European Space Agency's PLATO, said Bill Chaplin.
16 Articles
16 Articles
An analysis of more than four decades of astronomical observations made it possible to detect subtle changes in the internal structure of the Sun during periods of lower solar activity.The study was carried out by scientists from the University of Birmingham in the United Kingdom and Yale University in the United States.The results were published in the scientific journal Monthly Notices of the Royal Astronomical Society.The research concludes t…
Scientists reveal how Sun’s hidden musical notes could predict ‘space weather’
A new study has revealed “notes” produced by the sun may be able to predict powerful solar eruptions that can disrupt satellites, communications and power grids on Earth.By tracking the subtle shifts of notes during quiet periods, scientists have been able to identify “standing waves” that resonate and produce a clear pitch amid the turbulent outer layers of the sun.Sound waves bouncing around pockets of the sun begin to resonate, rendering it a…
Published 40 years of data on changes occurring between solar cycles (ANSA)
Coverage Details
Bias Distribution
- 60% of the sources are Center
Factuality
To view factuality data please Upgrade to Premium
