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04:57 Jan 18, 2001
Italian to English translations [Non-PRO] Science
Italian term or phrase:sciame sismico
quando uno sciame sismico di oltre 800 scosse di cui alcuni di quasi 6 grado della scala Richter si è abbattuto sulla città distruggendola in parte
Explanation: As I too had the option of the swarm or the shower, I did a web search before I confirmed my answer.
I got quite a few hits for "seismic swarm" and got none for "seismic shower".
I did get "meteor shower", so I presumed that sciame is more applicable as shower in the meteor context and as swarm in the geolological context.