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5.5. magnitude earthquake shakes off Oregon Coast, no tsunami expected

Five people reported feeling the quake, and the National Weather Service said no tsunami was expected.

  • A 5.5 magnitude earthquake struck off the Oregon coast early Monday, June 29, 2026, according to the United States Geological Survey, centered approximately 135.5 miles west of Bandon.
  • The seismic event originated along the Blanco Fracture Zone, an active fault system where tectonic plates slide past one another. Chief Meteorologist Brian MacMillan noted this is distinct from the Cascadia Subduction Zone.
  • Officials confirmed no tsunami threat existed following the 4:35 a.m. tremor, and the earthquake caused no reported damage or injuries. Seven residents reported feeling the shaking to the USGS.
  • The USGS encourages anyone who felt the earthquake to contribute to citizen science by reporting their experience on its website to help seismologists gather regional seismic data.
  • According to the USGS Aftershock Forecast, there is a 59% chance of at least one aftershock of magnitude 3.0 or greater in the next week, with an 18% probability for magnitude 4.0 or greater.
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5.5. magnitude earthquake shakes off Oregon Coast, no tsunami expected

The earthquake comes days after heightened seismic activity across the world.

·Spokane, United States
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KATU broke the news in Portland, United States on Monday, June 29, 2026.
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