Strange blue rings found in Scandinavian trees leave scientists perplexed - Rings hint at unusually cold summers in Norway ...

21 from the volcano in the Andean mountain range, just 45 kilometers southeast of Quito, so a full eruption is expected anytime soon. The Cotopaxi is one of the most active volcanoes in Ecuador.

Scientists studying tree rings in northern Norway have linked ‘blue’ rings, caused by cold summers, to volcanic eruptions ...

These rings are not just a visual anomaly but serve as natural archives of past cold summers. Researchers studying samples ...

Volcanic eruptions and cold summers leave lasting marks in the wood of northern trees, unlocking the secrets of past climate extremes.

In Norway, scientists have found blue rings in trees that hint at how volcanic eruptions disrupted growth throughout history.

Some studies have also found links between the cold Norwegian summer of 1877 and the eruption of Cotopaxi in Ecuador. But researchers say “there is no other evidence” to link the volcanic ...

While the blue rings from 1877 align with a June eruption of Cotopaxi in Ecuador, the blue rings from 1902 align with a May eruption of Mount Pelée in Martinique. Mostly observed in latewood, which ...

Geodetic techniques have been considered a seminal part of volcano monitoring and eruption forecasting for decades. Ground deformation and gravity are used to determine mass change below active ...