Usually the way it works.
But the truth is it is not always the way it work. Whether any tsunami happens depends on undersea displacement along with a host of other factors. The default position is assume tsunami with a big coastal earthquake and hope for the best. Since there have been no subsequent reports I am guessing no big tsunami threat on this one.
I did say, usually.
I had to stop Anonymous comments due to spam. But I welcome all legitimate comments. Thanks.