TOKYO -- Japan on Friday issued a tsunami advisory after a 6.7 magnitude earthquake shook the country’s northeast, according to the Japan Meteorological Agency. The quake occurred off the east coast of Aomori prefecture, in the north of Honshu, the main Japanese island, at a depth of 20 kilometers (12.4 miles) at 11:44 a.m. local time, JMA said.

On Monday morning, around 30 minor earthquakes erupted in a swarm near the Geysers geothermal field south of Clear Lake. The day before, seven quakes rattled Sonoma County, including a 4.0 quake. The recent uptick isn't out of the ordinary, according to U.S. Geological Survey seismologist Susan Hough.

A powerful earthquake of 6.7 magnitude struck northeast Japan on Friday, the U.S. Geological Survey (USGS) reports.

A powerful 7.5-magnitude earthquake has struck off northern Japan, injuring over 20 people and triggering a tsunami

The Japanese Meteorological Agency said the quake struck off Hokkaido and issued an alert for a tsunami of up to 10 feet.

A 6.7 magnitude earthquake occurred Friday afternoon local time off the northern coast of Japan, the Japan Meteorological Agency said. The earthquake comes after a 7.5 magnitude earthquake struck the same region earlier this week.

Japan’s government says that the chances of a magnitude 8 earthquake have increased. Scientists can’t predict when one will strike, but it represents a meaningful jump over typical odds.

TOKYO >> Japanese authorities lifted tsunami warnings on Tuesday hours after a powerful 7.5-magnitude earthquake shook northeastern regions, injuring at least 30 people and forcing about 90,000 residents to evacuate their homes.

A 6.7 magnitude earthquake occurred Friday afternoon local time off the northern coast of Japan, the Japan Meteorological Agency said. The earthquake comes after a 7.5 magnitude earthquake struck the same region earlier this week.

For millions of Californians, the ground did not simply shake once and fall silent. It pulsed again and again over roughly eight hours, a rolling sequence of small and moderate earthquakes that stretched from the Bay Area to the mountains of Southern California and turned a familiar hazard into an unnerving drumbeat.