(Reuters) - Scientists reacted with alarm to the manslaughter conviction of six earthquake experts in Italy for failing to give adequate warning of the 2009 earthquake in the city of L'Aquila that killed 308 people.

Scientists warned that researchers in areas involving unpredictable natural threats, like volcanology and even meteorology, will now be more reluctant to offer advice and insight to the public.

"If it stands, this verdict will have a chilling effect on earthquake science in Italy and throughout Europe," said Sandy Steacy, professor of earthquake physics at the University of Ulster.

"Who would now be willing to serve on an earthquake hazard evaluation panel when getting it wrong could mean a conviction for manslaughter?"

The ruling comes at a time when scientists are being coaxed into more active engagement with the public to demonstrate the importance of their work for the economy and the community.

"This case suggests that such engagement can be very dangerous," said Steacy.

Prosecutors had argued the experts gave inaccurate reassurances after tremors that preceded the 6.3 magnitude quake.

The six seismologists and one government official took part in a meeting before the quake in March 2009 where a risk assessment committee told city officials that a major quake was improbable, although not impossible.

"What those six scientists said was correct and any seismologists would support it," said Roger Musson at the British Geological Survey. "It seems to be wrong that they should be prosecuted for offering scientific advice to the best of their ability."

In the United States, Michael Halpern at the Union of Concerned Scientists lobby group said in a blog: "This is an absurd and dangerous decision that U.S. officials should rebuke, and Italian President Giorgio Napolitano should overturn."

MORE