Of particular interest is the overlap with the Maunder Minimum.

The severe cold occurred during the time of low sun spot activity known as the Maunder Minimum.

The period of low sunspot activity from 1645 to 1717 is known as the "Maunder Minimum".

The Maunder Minimum occurred between 1645 and 1715 when very few sunspots were observed.

During the Maunder minimum, for example, the Sun underwent a 70-year period with almost no sunspot activity.

These larger-scale changes are most obvious in the case of the Maunder Minimum, a period that ran roughly between 1645 and 1715.

These indicate lower solar activity during the Maunder Minimum.

Astronomers do not know what caused this "Maunder Minimum".

This period is known as the Maunder Minimum.

The reconstruction showed a cool period extending beyond the Maunder Minimum, and warmer temperatures in the 20th century.