failing to adequately warn of the L'Aquila earthquake
They didn't just fail to warn people, they explicitly reassured already-worried people that there would be no large quake. See http://tremblingearth.wordpress.com/2012/10/23/conviction-of-italian-seismologists-a-nuanced-warning/
Discussion article for the meetup : Cincinnati February: Predictions
WHEN: 16 February 2013 02:00:00PM (-0500)
WHERE: 354 Ludlow Avenue
We will meet at the Amol India on Ludlow street at 1400. This month's exercise is to try for calibration. Each of us should give a probability for each of the five events below occurring before April 1st; at the meetup we will discuss our reasoning and perhaps update. Then in April we'll see how we did, as a group and individually.
If you like, you can substitute other questions, or suggest new ones, in the comments. Posting to PredictionBook is optional but encouraged.
Discussion article for the meetup : Cincinnati February: Predictions