No earthquake reported or felt, darn strange. Sure bounced the needle here. At about 10 am Portland time. Nothing to show on other seismographs.
http://earthquake.usgs.gov/monitoring/operations/data/Seismic_Data/telemetry_data/COR_24hr.html
http://earthquake.usgs.gov/monitoring/operations/data/Seismic_Data/telemetry_data/COR_24hr.html