I-MAG STS Corporation
The red diamond is the November 17 1984 7.4 - all quiet for a month before it. 5.3, 5.0 and 3.8 aftershocks that day  
Nias 1984
Nias 2002
The red diamond is the November 2 2002 7.6 - all quiet for six weeks. 10 aftershocks followed with 7 more quakes  later  
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