Solar corona photographs captured by Brno mathematicians during the August 12, 2026, total solar eclipse reveal coronal holes and plasma vortex structures known as smoke rings.
Coronal Holes and Solar Wind Mechanics
The solar corona appears as a glowing, nebulous ring around the sun when the moon completely blocks the solar disk. Within this bright envelope, the new imagery exposes a distinct coronal hole—a region where the sun’s magnetic field releases matter into space as the solar wind. Druckmüller explained that incoming charged particles from the solar wind strike Earth’s magnetic field, triggering auroras outside typical high-latitude regions as well as disruptions to satellite operations, radio communication, and navigation systems. The research team previously captured a similar structure in 2015 during a very similar phase of the prior 11-year solar activity cycle.
High-Resolution Documentation of Plasma Vortex Rings
Beyond broad coronal holes, the expedition photographs render fine vortex structures called smoke rings with exceptional clarity. Druckmüller first recorded these delicate formations during the 2008 solar eclipse, though investigators spent years identifying them as plasma instabilities within the solar corona. Space-borne solar probes eventually detected identical smoke ring structures roughly a decade after the Brno team's initial ground-based captures, confirming the precision of the Czech optical techniques. The latest observation campaign in Spain marks the sixteenth solar eclipse expedition undertaken by the BUT mathematicians, incorporating 28 researchers and university students.
Observational Comparisons with Spacecraft Data
| Observation Method | Primary Instrument / Team | Key Structural Discoveries |
|---|---|---|
| Ground-Based Eclipse Expedition (2026) | Brno University of Technology (Miloslav Druckmüller, Václav Široký) | High-resolution coronal holes, extended plasma ring structures from Pico Trigaza, Spain. |
| Space-Based Solar Probes | Orbital Observatories | Confirmed fine-scale smoke ring plasma instabilities approximately ten years after initial ground detection. |
Causes and effects of coronal holes and solar wind
What causes coronal holes to form on the sun?
Coronal holes are areas where the sun’s magnetic field releases matter into space in the form of solar wind.
How do ground-based cameras capture details invisible to the naked eye?
The solar corona is captureable when the moon completely blocks the sun.
What impact does the solar wind have on Earth?
When charged solar particles interact with Earth’s magnetosphere, they can produce visible auroras in lower latitudes and interfere with navigation systems, satellite electronics, and radio communication.