On: L'Aquila quake: Italy scientists found guilty of m...

[Uchikoma]

What you quote says:

1. "They were not accused of failing to predict the earthquake" 2. "whether the seismic sequence could be considered a precursor event"

[HerrMonnezza → Uchikoma]

My understanding is that "precursor event" has a specific meaning in seismology, i.e., sentence 2. is more restrictive than 1.

But I'm no expert, so I'll be grateful if someone with the knowledge could clarify.