CONTRA COSTA COUNTY, CA - Monday morning, a 3.6 magnitude quake was reported close to San Ramon, according to the U.S. Geological Survey.

The earthquakes are not believed to be connected. But they are a reminder of lurking danger.

Over 200 people have reported feeling a 3.2-magnitude earthquake that struck Sunday morning in the Willamette Valley. The U.S. Geological Survey said the quake was recorded shortly before 8 a.m. about three miles southeast of Amity,

CONTRA COSTA COUNTY, CA - Monday morning, a preliminary 2.9 magnitude quake was registered close to San Ramon, according to the U.S. Geological Survey.

The 7.6-magnitude quake struck in waters off Aomori Prefecture on Japan’s main island, Honshu. It triggered a tsunami warning, which was later lifted.

UNR seismology lab says the ShakeAlert warning of a 5.9 east of Dayton was wrong.

There were no immediate reports of major damage, but the state transportation department said it would survey roads, bridges and other infrastructure.

An alert that notified Bay Area residents of a 5.9 earthquake Thursday morning in Nevada was deleted by the U.S. Geological Survey. The ShakeAlert message at 8:08 a.m. said the quake was about 15 miles east of Carson City, near Dayton. Within minutes, though, the notification was deleted.

The United States Geological Survey quickly deleted the alert, saying it had been sent in error. “This isn’t a good look,” one earthquake expert said.