We should expect large earthquakes and volcanic eruptions during the solar minimum we are entering. The volcanoes represent a worldwide threat, we could see serious disruptions to agriculture due to matter in the stratosphere. Most people are getting hysterical about global warming, but cooling actually represents a much greater threat, likely because the earth's crust contracts and the extra pressure results in large earthquakes and volcanic eruptions.
"Research shows that large earthquakes occur at low sunspot frequencies. A sample of global earthquakes greater than Magnitude 6 for the period 1973-2005 (USGS) compared to smoothed monthly sunspot figures (SIDC) show that 71% of earthquake energy is released and 59% of earthquake events occur at lower than average sunspot activity."