There are infrasonic warnings of imminent tectonic events, to which cetaceans must be sensitive. We do know that dolphins and whales can be fatally sensitive to DOR of Navy sonar, and underwater towers.
This latest round of large Asian tremblors began 12. Nov. with a 6.0 in Papua New Guinea: http://www.iris.edu/seismon/last30.html
Given the time zone differences, am not sure of the sequence of events, but on 13. Nov, there were 78 pilot whales beached at Whangerai, No. Island, New Zealand.
Here’s the image link, in case the graphic does not post: