Texture of average solar photospheric flows and the donut-like pattern

Open Access

Fig. 17.

Evolution of the velocity modulus u_h on 29 November 2018. The time step between each frame is 1 h and the field of view spans 127″ × 155″ (90.9 × 111 Mm²). White squares indicate points where the vorticity modulus has an amplitude greater than 5.5 × 10⁻⁵s⁻¹.

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