Heavy oilfield activity anon. It's in Alaska's North Slope oilfield region. Alaskanon who works there periodically. FYI - 3.3 isn't shit for an AK earthquake. We generally wouldn't even feel that. I don't know why a 3.5 or 4.0 does significant damage in some places and not others but it doesn't raise an eyebrow in AK.
Go to your search engine, type Alaska earthquakes. You'll learn a few things.