Local Twitterers reported the incident nearly 40 minutes before BBC. Here's some of the first tweets in chronological order:

wwwicked (Morecambe, U.K.) EARTHQUAKE!! #morecambe Felt the building shudder, at least. 28 Apr 2009 from TwitterFox aarmitage (Grange over Sands, U.K.) whoooa! Think we just had a mini earthquake! Did the earth move for you? 28 Apr 2009 from TweetDeck andasmith (Morecambe, U.K.) whole house just shook, scared me still shaking. earth moved for me. 28 Apr 2009 from web atl (Carnforth, U.K.) Up in Carnforth, the #earthquake felt like a big "bounce"… as if the house foundations were giving. What was it like in Lancaster? 28 Apr 2009 from Tweetie iMacstu (Yealand Redmayne, U.K.) @wwwicked #EARTHQUAKE bonkers mate!! not felt one like that for a while!! right in the city centre oposite the market 28 Apr 2009 from OutTwit in reply to wwwicked
Minor earthquake rattles North West England
May 7
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May 6
Supreme Court protests in Brazil
Library fire drill in Egypt
Russia responds to NATO act
Pregnant woman escapes death penalty
May 5
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Pakistan asks Swat citizens to flee
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Georgia claims attempted coup
U.S. officials predict recession end in 2009
May 4
Featured TwitPic: West Coast of Ireland
Swine flu shows signs of slowdown
Nepal Prime Minister Prachanda resigns
Twitter buzzing about Star Wars Day
May 3
Hand of Harmony in South Korea
'Crazy' Martinelli elected president of Panama
Economic woes plague Zimbabwe
IOC leaves Rio impressed by 2016 Olympic bid
May 2
Rio de Janeiro impresses IOC
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Violence escalates in Karachi, Pakistan
Edinburgh helicopters cause a stir on Twitter
May Day protests spark violence in Europe
May 1
Small earthquake shakes Los Angeles area
Sunset at Magnetic Island in Australia
China takes precautions for swine flu
U.N. criticizes Egypt's pig slaughter
Delara Darabi executed in Iran