SALEM, Ore. (AP) — Five earthquakes ranging in magnitude up to 5.9 have struck off the coast of the Pacific Northwest, but they weren’t strong enough to generate tsunamis, scientists said. The earthquakes were shallow, at 6 miles deep, often a signal of a dangerous quake. It usually takes an earthquake of magnitude 7 or better to trigger a tsunami, said geophysicist Paul Caruso of the U.S. Geological Survey.