The last GSM was the Maunder Minimum - the period around 1645 to 1715 during which sunspots became exceedingly rare. It roughly coincided with the middle part of the Little Ice Age, during which Europe and North America experienced colder than average temperatures. The team's calculations not only match up with the timelines of the Maunder Minimum, but also the Wolf minimum (1300–1350), Oort minimum (1000–1050), Homer minimum (800–900 BC); also the Medieval Warm Period (900–1200), the Roman Warm Period (400–150 BC) and so on with great accuracy.
Our planet and Sun move in a complex orbital pattern which in turn affects our climate. The upcoming GSM, predicted to start in 2020 and last until 2055, is a huge cause for concern. We are already witnessing increased unstable weather patterns, prolonged major floods, massive crop failures and wild swings in temperature (both up and down) among other extreme events, including high-level volcanic eruptions, suggesting NOW is the time to adapt.
Both NASA and NOAA are forecasting very low solar activity during the next solar cycle (Solar Cycle 25), in fact, the lowest in 200 years. NOAA expects the end of Cycle 24 and start of Cycle 25 to occur no earlier than July 2019, and no later than September 2020.
For more information, follow the link to the article by The Watchers below, which includes links to a You Tube video by Valentina, as well as to a book called Climate Revolution – The Grand Solar Minimum.