IMAGE: St. Stephen's tower and Big Ben
Max Nash  /  AP file
Spring flowers are shown in London's Parliament Square in front of St. Stephen's tower, which contains Big Ben, in March.
updated 5/28/2005 10:21:05 AM ET 2005-05-28T14:21:05

Big Ben, the landmark London clock renowned for its accuracy and chimes, stopped ticking for 90 minutes, an engineer said Saturday.

Officials do not know why the 147-year-old clock on the banks of the River Thames stopped at 10:07 p.m. Friday. It resumed keeping time, but stalled again at 10:20 p.m. and remained still for about 90 minutes before starting up again, said an engineer at the Palace of Westminster, which operates the clock.

The engineer requested anonymity because he was not officially authorized to speak to the press.

There has been speculation a recent spell of hot weather may have been to blame. Temperatures in London reached 90 Saturday, and forecasters called it England’s hottest day in May since 1953.

But the engineer said the cause was unclear.

'Minor glitch'
“We’ve been told there was a minor glitch, but then it was started up again,” he told The Associated Press.

Big Ben survived attacks by German Luftwaffe bombers during World War II, continuing to mark the time to within 1½ seconds of Greenwich Mean Time.

However, the clock has experienced occasional problems.

In 1962, snow caused the clock to ring in the New Year 10 minutes late. In 1976, the clock stopped when a piece of its machinery broke. Big Ben also stopped on April 30, 1997, and once more three weeks later.

Big Ben, the clock’s 13-ton bell, which was named after Sir Benjamin Hall, the British commissioner of works at the time the clock was built.

The official name for the Gothic tower holding Big Ben is St. Stephen’s Tower. Standing 315 feet tall, it was completed in 1858 after an 1834 fire destroyed most of the Palace of Westminster.

© 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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