Esa Hiltula/Daniel Jara/Getty The cooling may be linked to major volcanic eruptions: Mount Pelée on Martinique in 1902 and Cotopaxi in Ecuador in 1877. These eruptions likely cast a volcanic ...

The scientists identified blue rings caused by particularly cold summers in 1877 and 1902, which could potentially have been caused by the eruptions of far-off volcanoes Cotopaxi in Ecuador and Mount ...

possibly caused by the eruptions of Mount Pelée on the island of Martinique and Cotopaxi in Ecuador. "Blue rings look like unfinished growth rings, and are associated with cold conditions during ...

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 ...

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 ...

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

Strange blue rings found in Scandinavian trees leave scientists perplexed - Rings hint at unusually cold summers in Norway between 1877 and 1902 ...