The British Geological Society has warned of aftershocks following the largest earthquake in the Channel Islands for almost a century.
The BGS spokesman said: "Small earthquakes do occur in this region from time to time. It is not unusual for earthquakes like this to be followed by aftershocks.
"We get an earthquake of magnitude 4 to 4.9 roughly every two years."
Up to 300 earthquakes are detected in the UK by the BGS annually.
More top news
It will be increasingly humid and thundery with highs of 30C or more today.
Holidaymakers in Tunisia are determined not to be beaten. But, as Neil Connery writes, it won't be easy to escape the shock of the massacre.