Gone, too, is the combative, infelicitous side of Strawberry that erupted periodically.

His chronic disease, which erupted periodically like a benign volcano, was his insurance policy.

The volcanic ridges also periodically erupt hot lava to form new ocean floor, as was the case here last June.

It began erupting in 1900 and erupted periodically for four years until a landslide changed the local water table.

Violence, atrocities, and reprisals continued to erupt periodically for the next 18 months.

Though two cones had subsided, the third and smallest still erupted periodically over the centuries.

Tension erupted periodically over trade and technology issues.

The creatures had no choice but to periodically erupt into violence.

The complexity of population and rapid rate of change has caused social tensions to erupt periodically in violence.

Press release battles between Turkey and other countries erupt periodically in Washington.