As the present swarm appears to be on the French side of the  channel I 
won't worry about it.
I believe the seismic activity is the results of an old wound from the  
closure of the Rheic sea that separated Avalonia from Gondwana some time  ago. 
I expect there have been many large earthquakes over the last few  hundred 
million years,
 
Martin





 
 
As the present swarm appears to be on the French side of th=
e 
channel I won't worry about it.
I believe the seismic activity is the results of an old wound fr=
om the 
closure of the Rheic sea that separated Avalonia from Gondwana some time=
 
ago. I expect there have been many large earthquakes over the last fe=
w 
hundred million years,
 
Martin