“Could volcanic period be ahead?” asks the headline in the Iceland Monitor.


Iceland eruption could mark the beginning of a volcanic period lasting a few centuries

David Hartley

Interesting article in the Iceland Monitor about eruptive phases on Iceland. What caught my eye was the fact it settled round about 1300 which Wiki has as round about the beginnings of the Little Ice Age.

“If an eruption occurs, it would likely mark the beginning of such a [volcanic] period – lasting a few centuries (emphasis added), I believe,” states Magnús Á. Sigurgeirsson, geologist at ÍSOR Iceland GeoSurvey – a consulting and research institute in the field of geothermal sciences and utilization.

Research reveals that during the latter part of Holocene – a term used to describe a period that began about 11,700 years ago – the volcanic systems on the Reykjanes peninsula have erupted every 900 to 1100 years. Less is known about the first part of Holocene.

Each eruption period appears to have lasted about 500 years, and during that time most of the volcanic systems appear to have been active, albeit generally not simultaneously. The volcanic activity is characterized by eruptions that each last a few decades. Lava flows from volcanic fissures that can be as long as 12 km (7.5 mi).

It has been conventionally defined as a period extending from the 16th to the 19th centuries, but some experts prefer an alternative timespan from about 1300 to about 1850.

The NASA Earth Observatory notes three particularly cold intervals: one beginning about 1650, another about 1770, and the last in 1850, all separated by intervals of slight warming.

The incidences of slight warming is vaguely analogues with much of what we see today.

The Medieval Warm Period (MWP) also known as the Medieval Climate Optimum, or Medieval Climatic Anomaly was a time of warm climate in the North Atlantic region lasting from c. 950 to c. 1250. It was likely related to warming elsewhere while some other regions were colder, such as the tropical Pacific. Average global mean temperatures have been calculated to be similar to early-mid-20th-century warming. Possible causes of the Medieval Warm Period include increased solar activity, decreased volcanic activity, and changes to ocean circulation.

As we can see this Mediaeval period could perhaps have ended in something like a hiatus in Globull warming for 18 yrs before the World became a little chillier. Across the articles one can also see anomalies of warmer/colder in some spots that others. However as History has proven what the Green Terrorists refuse to accept that one measures climate by trends of Decades, Centuries and Geological Epochs. NOT last weeks weather reports.

This article goes into great depth concerning the dates of previous volcanic periods:

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March 6, 2021 at 02:42PM