Small Quake Shakes Off Oregon Coast This Weekend As Another Rattles Alaska Published 02/28/21 at 5:20 PM PDT By Oregon Coast Beach Connection staff (Bandon, Oregon) – A small earthquake shook off the southern Oregon coast early Saturday morning, clocking in at a minor 4.0 in magnitude. Meanwhile, a larger quake rattled parts of southern Alaska a bit later in the day, reminding some Oregonians of the quake there that caused a tsunami here in the '60s. (Graphic courtesy Pacific Northwest Seismic Network. Other recent tremblors are in yellow) The undersea quake took place about 250 miles off the south coast, this time in more of a straight line westward from Dunes City instead of the usual Coos Bay or Reedsport. At a magnitude 4.0 it was not strong enough to generate a tsunami; it takes at least a 7.0 to do that. The quake shook at 5:33 a.m. Saturday at a depth of about six miles.