BGS ALERT: POSSIBLE SONIC EVENT  LlANDRINDOD WELLS  15 SEPTEMBER 2004

BGS have received numerous reports from the media and residents of the Llandrindod Wells area of Mid Wales, of a felt event sometime between 11:00 and 11:15 BST, this morning.  Felt reports described, "heard a loud bang", "the windows rattled" and "the whole building shook".  Data from the BGS rapid-access networks in the region were examined and no earthquakes or signals consistent with a sonic origin were recorded. However, the reports received are consistent with historical observations received for previous events with a sonic origin.

RAF flying complaints have been contacted but were unable to confirm if aircraft were operational at the time.



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Bennett Simpson
Global Seismology & Geomagnetism Group
Murchison House West Mains Road 
Edinburgh
EH9 3LA

Tel: +44(0)1316671000 (switchboard)
Tel: +44(0)1316500217 (direct line)

mailto:b.simpson@bgs.ac.uk 
Internet http://www.earthquakes.bgs.ac.uk/
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