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It looks like there is a good chance this will now keep going and fill in the normal 14-month ETS area that goes from southern Vancouver Island to southern Puget Sound. If that is the case it could take another two to three weeks to finish making this one of the longer and largest ETS sequence we have observed. The next couple of days should provide the data to make this prediction more sure (and then it too will probably end up being wrong).
This ETS seems significantly different...
Garry Rogers, who looked back through older Canadian records says: " We have not seen that behaviour before since we have had continuous digital data to analyse; i.e. April 1997 event onwards."
I haven't determined if it is unique yet or not but there have also been periods when this tremor seems VERY strong compared to previous ETS events.