How did a weather satellite track Europe’s total eclipse?
On August 12, ESA’s MTG-I1 satellite followed the Moon’s shadow across the North Atlantic and into the Iberian peninsula.
MTG-I1 images captured the path of totality crossing Greenland and Iceland before reaching northeastern Portugal and Spain, where mainland totality lasted only a few minutes.[1] Ground-level photographs simultaneously revealed the solar corona, normally overwhelmed by the bright solar disc, as the…
MTG-I1 images captured the path of totality crossing Greenland and Iceland before reaching northeastern Portugal and Spain, where mainland totality lasted only a few minutes.[1] Ground-level photographs simultaneously revealed the solar corona, normally overwhelmed by the bright solar disc, as the eclipse passed from Greenland toward Europe.[4]
Why it matters: The event demonstrates how a geostationary weather satellite can provide a continuous, continent-scale view of an eclipse while observers inside the narrow path record details of the Sun’s atmosphere.[1][4]
Key insights: MTG-I1 observes Europe and northern Africa from geostationary orbit about 36,000 km above Earth, allowing it to keep the same region continuously in view.[1] | The satellite recorded the Moon’s shadow converging with Europe’s advancing twilight as dusk fell.[1] | Totality followed a narrow track, but a partial eclipse was visible from northern Canada and the Nordic countries to the western African coast as far south as Sierra Leone and Liberia.[1]
Cheatsheet facts: What changed: MTG-I1 produced an orbital sequence of the Moon’s shadow sweeping from Greenland and Iceland into Portugal and Spain.[1] | Why now: The total eclipse crossed mainland Europe between 20:26 and 20:34 CEST on August 12, while evening twilight was advancing.[1] | Watch next: MTG-I2 is scheduled to launch on August 27, 2026, aboard Ariane 6 flight VA270 from Europe’s Spaceport in French Guiana.[1]
MTG-I1 images captured the path of totality crossing Greenland and Iceland before reaching northeastern Portugal and Spain, where mainland totality lasted only a few minutes.[1] Ground-level photographs simultaneously revealed the solar corona, normally overwhelmed by the bright solar disc, as the eclipse passed from Greenland toward Europe.[4]
Why it matters: The event demonstrates how a geostationary weather satellite can provide a continuous, continent-scale view of an eclipse while observers inside the narrow path record details of the Sun’s atmosphere.[1][4]
Key insights: MTG-I1 observes Europe and northern Africa from geostationary orbit about 36,000 km above Earth, allowing it to keep the same region continuously in view.[1] | The satellite recorded the Moon’s shadow converging with Europe’s advancing twilight as dusk fell.[1] | Totality followed a narrow track, but a partial eclipse was visible from northern Canada and the Nordic countries to the western African coast as far south as Sierra Leone and Liberia.[1]
Cheatsheet facts: What changed: MTG-I1 produced an orbital sequence of the Moon’s shadow sweeping from Greenland and Iceland into Portugal and Spain.[1] | Why now: The total eclipse crossed mainland Europe between 20:26 and 20:34 CEST on August 12, while evening twilight was advancing.[1] | Watch next: MTG-I2 is scheduled to launch on August 27, 2026, aboard Ariane 6 flight VA270 from Europe’s Spaceport in French Guiana.[1]