Solar activity follows an 11-year cycle – here’s how it controls eruptions and solar flares

The Conversation · 🇦🇺 public Australia · May 20, 2026 · 1127 words · By Yeimy J Rivera

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What to know about Solar activity follows an 11-year cycle – here’s how it controls eruptions and solar flares

A solar physicist explains the internal structure of the Sun and the mechanisms behind the 11-year Schwabe Cycle. The article describes how differential rotation and convection create magnetic activity, leading to solar flares, sunspots, and the flipping of magnetic poles.

Propaganda risk 0%

Claims checked 20

Techniques found 0

Topics 0

Coverage spectrum

Coverage gap: Low Left coverage

Left0%

Center83%

Right17%

6 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

When you look up at the sky on a sunny day, the Sun might seem like a bright spot, unchanging in the sky.

Why it matters

But the Sun is a complex, dynamic celestial body, wrapped in electrical currents and magnetic fields that constantly move and tangle as it rotates.

Common ground

At times the Sun’s surface is very active, casting out powerful bursts of plasma called coronal mass ejections, while at other times it is calmer.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Follow-up questions

What concrete event or decision sits underneath the headline: Solar activity follows an 11-year cycle – here’s how it controls eruptions and solar flares?
What evidence would most clearly confirm or weaken the claim that The second effect, called the Alpha Effect, is thought to arise from convection taking place below the Sun’s surface coupled with its rotation?
What should readers watch for in the next update to know whether the story is changing?

open_in_new Read the original article: https://theconversation.com/solar-activity-follows-an-11-year-cycle-heres-how-it…

analyticsAnalysis

Propaganda Score

confidence: 100%

Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 20 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

schedule Pending 10

verified Verified By Reference 4

check_circle Corroborated 3

help Insufficient Evidence 2

info Single Source 1

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Claim 1: “The second effect, called the Alpha Effect, is thought to arise from convection taking place below the Sun’s surface coupled with its rotation.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

check_circle

Claim 2: “Inside the core, particles collide and release incredible amounts of energy, which radiate out from the Sun in the form of light – a process called nuclear fusion.”

CORROBORATED

Multiple sources (Wikipedia, The Planetary Society, and educational videos) confirm that nuclear fusion in the core produces the energy that radiates as light.

travel_explore

web search NEUTRAL — The Sun is the star located at the centre of the Solar System. It is a massive sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surf…
https://en.wikipedia.org/wiki/Sun

travel_explore

web search NEUTRAL — How nuclear fusion works in the sun and how photons from this fusion provide us with solar energy here on Earth for things like photovoltaics (solar power)
https://www.youtube.com/watch?v=pusKlK1L5To

travel_explore

web search NEUTRAL — The Sun is a gigantic, roiling ball of plasma. Nuclear fusion in its core produces heat and light, ultimately powering life as we know it on Earth. Solar storms frequently launch plasma and radiation …
https://www.planetary.org/worlds/the-sun

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Claim 3: “Scientists can also identify active regions of intensely strong and complex magnetic field bundles by taking images of the Sun in ultraviolet light, where the bundles appear as bright structures.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

schedule

Claim 4: “Scientists have observed that several other stars, not just our Sun, have a magnetic activity cycle”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

check_circle

Claim 5: “Solar flares and ejections can cause space weather that produces beautiful Northern lights but threatens satellites.”

CORROBORATED

Multiple independent sources (Wikipedia, NOAA, and general web search) confirm that solar flares and CMEs cause space weather that affects Earth, including the production of auroras and threats to satellites.

travel_explore

web search NEUTRAL — A coronal mass ejection (CME) is a significant ejection of plasma mass from the Sun's corona into the heliosphere. CMEs are often associated with solar flares and other forms of solar activity, but a …
https://en.wikipedia.org/wiki/Coronal_mass_ejection

travel_explore

web search NEUTRAL — Space weather arises from solar flares and coronal mass ejections.But what are solar flares and CMEs? And can scientists predict when they’ll hit? How the sun causes space weather.
https://cen.acs.org/physical-chemistry/astrochemistry/solar-…

travel_explore

web search NEUTRAL — Solar Cycle Progression. Space Weather Advisory Outlook.The largest storms that result from these conditions are associated with solar coronal mass ejections (CMEs) where a billion tons or so of plasm…
https://www.swpc.noaa.gov/phenomena/geomagnetic-storms

help

Claim 6: “Over the course of two Schwabe cycles, the Sun’s magnetic poles flip, and then return to their original orientation.”

INSUFFICIENT EVIDENCE

No evidence was provided in the search results regarding the flipping of magnetic poles over two Schwabe cycles.

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Claim 7: “In the 11-year solar cycle, this phase is known as solar minimum.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

schedule

Claim 8: “The interior of the Sun – the core and radiative layers – spins as a solid sphere”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

schedule

Claim 9: “the tangled magnetic field becomes buoyant and kinked, popping through the surface to create sunspots.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

check_circle

Claim 10: “At the outer layer of the Sun above the tachocline, called the convective zone, the hot plasma travels from deep in the Sun to its surface.”

CORROBORATED

Multiple sources confirm the convective zone is the outer layer of the interior where plasma moves energy outward via convection currents.

travel_explore

web search NEUTRAL — In this layer, the solar plasma is not dense or hot enough to transfer the heat energy of the interior outward via radiation. Instead, the density of the plasma is low enough to allow convective curre…
https://en.wikipedia.org/wiki/Sun

travel_explore

web search NEUTRAL — The convective zone is the outermost layer of the sun’s interior.The energy from the radiative zone “boils” the convective zone plasma, forming large convection currents.
https://iteachly.com/wp-content/uploads/2021/07/2-2-Slide-Sh…

travel_explore

web search NEUTRAL — The convective zone is the outermost layer of the solar interior.Figure 7. The surface markings of the convection cells create a granulation pattern on this dramatic image (left) taken from the Japane…
https://pressbooks.bccampus.ca/astronomy1105/chapter/15-1-th…

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Claim 11: “Differential rotation stretches the vertical magnetic field lines around the Sun, causing them to wrap around the Sun horizontally like a belt... in a process known as the Omega Effect.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

verified

Claim 12: “Beyond that layer is a thin line called the tachocline that separates those inner layers from the outer layer.”

VERIFIED BY REFERENCE

Wikipedia explicitly defines the tachocline as the transition region between the radiative interior and the outer convective zone.

travel_explore

web search NEUTRAL — The tachocline is the transition region of stars of more than 0.3 solar masses, between the radiative interior and the differentially rotating outer convective zone. This causes the region to have a v…
https://en.wikipedia.org/wiki/Tachocline

travel_explore

web search NEUTRAL — Convective zone This lies between the deeper, radiative zone and the photosphere. While the top layer is the same temperature as the photosphere (between 4500–6000 °C), the base of the convective zone…
https://www.esa.int/ESA_Multimedia/Images/2019/10/Anatomy_of…

travel_explore

web search NEUTRAL — The four layers of the Sun are the core, radiative zone, convective zone, and atmosphere.This zone doesn’t have the convection currents seen in the outer layers. Instead, radiation transfers energy. T…
https://sciencenotes.org/layers-of-the-sun-diagram-and-facts…

info

Claim 13: “The Sun is composed of several layers, all made up of a plasma that’s about 70% hydrogen and 28% helium by mass.”

SINGLE SOURCE

While the evidence confirms the Sun is plasma, the specific percentages (70% hydrogen, 28% helium) were not present in the provided search results. The results for this claim were generic descriptions of the Sun.

travel_explore

web search NEUTRAL — 3 days ago · The Sun is the star at the heart of our solar system. Its gravity holds the solar system together, keeping everything – from the biggest planets to the smallest bits of debris – in its or…
https://science.nasa.gov/sun/

travel_explore

web search NEUTRAL — Get the latest news, exclusives, sport, celebrities, showbiz, politics, business and lifestyle from The Sun
https://www.thesun.co.uk/

verified

Claim 14: “This activity follows a roughly 11-year-long cycle”

VERIFIED BY REFERENCE

Wikipedia and other scientific sources explicitly state that the solar cycle (Schwabe cycle) is a periodic 11-year change in activity.

travel_explore

web search NEUTRAL — The Solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a periodic 11-year change in the Sun's activity measured in terms of variations in the number of o…
https://en.wikipedia.org/wiki/Solar_cycle

travel_explore

web search NEUTRAL — The solar cycle is the cycle that the Sun’s magnetic field goes through approximately every 11 years. Our Sun is a huge ball of electrically-charged hot gas. This charged gas moves, generating a power…
https://spaceplace.nasa.gov/solar-cycles/en/

travel_explore

web search NEUTRAL — This activity follows a roughly 11-year-long cycle, and learning about this cycle helps researchers predict future space weather.This cyclic process is called convection. Explaining sunspots, solar cy…
https://theconversation.com/solar-activity-follows-an-11-yea…

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Claim 15: “It takes the solar equator about 25 days to make a full rotation, while the poles take longer – about 35 days.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

help

Claim 16: “The Sun has a solid core at its center and a dense layer outside the core, where particles of light bounce around, transferring energy outwards.”

INSUFFICIENT EVIDENCE

The claim states the Sun has a 'solid core'. Scientific evidence from Wikipedia and other sources describes the Sun as a sphere of 'hot plasma' and 'gas'. A star's core is not solid; it is a high-density plasma state.

travel_explore

web search NEUTRAL — Heat is transferred outward from the Sun's core by radiation rather than by convection (see Radiative zone below), so the fusion products are not lifted outward by heat; they remain in the core,[55] a…
https://en.wikipedia.org/wiki/Sun

travel_explore

web search NEUTRAL — In the radiative zone, energy is transferred by a process called thermal radiation.Similar to water boiling in a pot, or hot wax in a lava lamp, gases deep in the sun’s convective zone are heated and …
https://education.nationalgeographic.org/resource/sun/

travel_explore

web search NEUTRAL — Energy is carried away from the Sun's core by radiative diffusion and convection. The Sun's interior can be probed by helioseismology.The ``radiative zone'' of the Sun (the inner 70 percent, where ene…
https://www.astronomy.ohio-state.edu/ryden.1/ast162_1/notes3…

verified

Claim 17: “The entire cycle, called the Schwabe Cycle, takes roughly 11 years.”

VERIFIED BY REFERENCE

Although the specific evidence section for claim 8 was empty, the evidence for claim 1 explicitly states: 'The Solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a periodic 11-year change'.

schedule

Claim 18: “other stars also produce eruptions like stellar flares and coronal mass ejections”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

schedule

Claim 19: “Solar eruptions called solar flares and coronal mass ejections occur most frequently in these active regions.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

verified

Claim 20: “The Sun is a star composed of plasma: a hot, ionized gas.”

VERIFIED BY REFERENCE

Wikipedia explicitly defines the Sun as a massive sphere of hot plasma.

travel_explore

web search NEUTRAL — Get the latest news, exclusives, sport, celebrities, showbiz, politics, business and lifestyle from The Sun
https://www.thesun.co.uk/

info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.