Volcanic activity has played a role in grand minimum cooling. We could see some Northern Hemisphere cooling with the eruption of this volcano.
From the Icelandic Meteorological Office:
A summary of seismic activity, written Tuesday evening 19th August 2014 at 20:00
Around 1.000 small earthquakes were detected in the Bárðarbunga region from midnight (18/19) until Tuesday evening 19th August at 20:00. All of them were smaller than magnitude 3 and most were located in the cluster east of Bárðarbunga.
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