BGS ALERT: CONFIRMED SONIC EVENT NORTH WALES 23 AUGUST 2007  11:00-11:20
UTC

BGS has received information from members of the public and the media of
events between 11:00 and 11:20 UTC this morning, from the Angelsey area
of North Wales. Reports describe "the windows rattled" and the house
shook" Data from the BGS rapid-access networks in the region were
examined and no tectonic seismic events were detected.=20

However, the reports received are consistent with historical
observations received for previous events with a sonic origin.=20

British Aerospace was contacted and has confirmed that a Typhoon
Euro-fighter was on supersonic exercises over the Irish Sea at the time
and that the aircraft went supersonic on two occasions within the time
window reported.


Bennett Simpson
British Geological Survey=20
Room 5/44
Murchison House=20
West Mains Road=20
Edinburgh, EH9 3LA=20
Tel: 0131 667 1000 (ext: 339)=20
Web: www.earthquakes.bgs.ac.uk


***************************************************************************=
************************************
This message (and any attachments) is for the recipient only. NERC is subje=
ct to the Freedom of Information Act 2000 and the contents of this email an=
d any reply you make may be disclosed by NERC unless it is exempt from rele=
ase under the Act. Any material supplied to NERC may be stored in an electr=
onic records management system.
***************************************************************************=
************************************