Here's why a tsunami warning was sent

A 7.0 magnitude earthquake that hit Humboldt County on Thursday morning was quickly followed by a tsunami warning from the National Weather Service. The warning has since been canceled.
Santa Cruz Sentinel on MSN5d
Tsunami warning: Was it a false alarm?
They were being cautious,” said Amy Williamson, a research scientist at the UC Berkeley Seismology Lab. “They would rather ...