
Are the following mentions coreferent?:
<m> 6 . 1 - magnitude quake </m> in A powerful 6. 1 - magnitude earthquake strikes the northern Indonesian province of Aceh, killing at least three people and injuring dozens more across the affected region. According to the US Geological Survey, the quake hit at a depth of 10 kilometers ( 6 miles ) in the Northern Province of Aceh. Last year, a 6. 4 - magnitude quake rocked the west coast of Sumatra Island, killing at least one person. 
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<m> 7.5 magnitude </m> in As aid started to arrive, hundreds of aftershocks continued to rattle the coastal city which was hit by the 7.6 and 7.5 magnitude quakes early on Sunday, cutting power and prompting a brief tsunami warning. 