http://eserver.org/history/aurora-of-1192.txt Since the publication of Ladourie's Histoire de climat depuis l'an mil in 1967, historians have generally accepted that the European climate deteriorated after about the year 1000. They have seen this deterioration as a cause of the Great Famine of 1315-1317, a factor the Black Death of 1347, and contributing to the depression of the fifteenth century. There has been little demand for a more precise chronology, and even less for a cause. Since it was noted that there were few sun spots during the period, and since someone coined the term, "The Era of the Quiet Sun," historians have been more or less content to accept a lack of solar storms somehow caused the deterioration of the medieval European climate. Is this an accurate work ?