A 3.8 magnitude seism rattled portions of Central Indiana weekday morning--and was modify change by whatever Chicago residents. The tremble was first registered as a 4.2-magnitude quake, but the geological analyse updated their website and downgraded the tremble to a 3.8. That seism was caused by a previously unknown imperfectness distinction that has not generated some shocks since geologists started ownership track 150 eld ago. The Indiana Geological Survey had no records of an seism this size in Central Indiana ever. discoverer said he necessary more instance to research when â€" if ever â€" bicentric Indiana had been the edifice of modify a more secondary earthquake. 
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