1.   Now, methods are in place to detect restless volcanoes in advance, quickly analyze trouble zones and issue detailed status reports to commercial and military authorities.

2.   Stairways presented the second most common trouble zone.

3.   When our golden glutes sag and our muscles turn gelatinous, we beat a path to the nearest gym to redefine the trouble zones.

4.   By contrast, if the results go according to form Saturday, Everton can move well clear of the trouble zone.

5.   Police sealed off the trouble zones, making it impossible for news reporters and the media to determine what was going on.

6.   Residents said police and paramilitary troops had cordoned off the latest trouble zone.