If we look at the years where there are a high
number of magnitude 7 earthquakes and compare them to solar maximum and
solar minimum events
we can see a clear correlation between the two.
There is a very strong tendency for large earthquakes to occur in large
numbers during the solar minimum. For example, there were 5 magnitude 7
earthquakes in 1812, which was a solar minimum. The next time there was a
large number of magnitude 7 earthquakes was in 1843. This correlation
repeats itself in 1855, 1867-68, 1875, 1888,
