We generally cannot predict when a volcano will erupt next unless it is imminent and the volcano is well-monitored. Kilauea is erupting now, and has been erupting almost continuously for over 30 years with no end in sight.
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December 21,2012
April 1st 2009April 1st 2009
The last eruption of Hawaii's Hualālai volcano was either in the year 1800 or 1801. It is still active and the next eruption is predicted to occur sometime during this century.
The Montserrat eruption was predicted by scientists. They warned the British government that the volcano was still active and would erupt again. The predictions were ignored.
Yes, the Mount Pinatubo Eruption was predicted.
The Eyjafjallajokull volcano was predicted because the only way was to see if there were any earthquakes or tremors or magma.
Volcanic eruptions are almost as difficult to predict as earthquakes. Any "prediction" would be little better than throwing darts at the calendar.
It is currently not known when Popocatepetl will erupt again. It's most recent eruption was on July 4th 2013. It is generally very hard to know when a volcano will erupt though scientists are finding ways to know when to expect one.
Can't prevent them but they are predicted by weather observations. This is called meteorology. Tornados can be predicted but what can't be predicted is how they move or where they will go next.
Probably the biggest problem with earthquakes is that they can't be predicted.
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