Since it's highly unlikely that an M9.5 quake could be covered up, as some have suggested, it seems to me that something is triggering the seismographs, and for now i'm thinking that perhaps it's related to some cosmic effect/electrical surges of some kind (i have no how or what it could be!), although perhaps even a hack attack could explain it.
Note that it's not a case of them getting the quake's strength wrong, it's that no quake happened, a fact backed up by the official data and citizen reporting in both cases.
Strange Sounds reported on the incident with screen shots, the full article is posted below
This seems very plausible to me especially with the accounts of strange sounds.
My thoughts exactly...
When meteor exploded over Zagreb, my friend said it felt like an earthquake and shook the apartment.
Accompanying shockwave was strong enough to show up on seismographs as an earthquake (no one said how high), also there were reports of a loud sonic boom.
But to trigger M9,5 - that must have been some big object...