Looking at the earthquake reports I see that a shallow, 6.1 magnitude July 2, 2013 earthquake in the Indonesia area reportedly claimed several dozen lives, perhaps more.

I don't know if any of the recently detected low intensity signals might have been pointing to that earthquake. They probably were.

There is an unusual effect that results in strong EM Signals being detected a day or two after an earthquake like that. A number of theories are being considered for why that happens. It appears to involve another approaching powerful earthquake.