(NewsNation) — An earthquake that struck Humboldt County in Northern California was felt in the Bay Area Thursday morning. The quake was a preliminary magnitude of 6.6, according to the United States Geological Survey. However, the USGS later revised that magnitude to 7.0 and then to 7.3.
No significant damage reported in San Francisco, Eureka
The cities of San Francisco and Eureka said there have been no reports of significant damage from the 7.3 earthquake off the coast of California’s Humboldt County.
Transit operations resume in San Francisco Bay Area
BART and MUNI announced that all services have resumed, but travelers could still expect system-wide delays.
Emergency operations center activated
California Gov. Gavin Newsom announced he was activating the state’s Emergency Services operations following the earthquake.
Commuters can expect significant delays
BART announced it was clearing trains out of the Transbay Tube, which runs under the San Francisco Bay between Oakland and San Francisco.
The agency warned that commuters could expect significant delays. Alternate transit operations are being provided by MUNI and SAMTRANS.
MUNI also announced two lines were being suspended.
The San Francisco Bay Ferry and Golden Gate Ferry were continuing normal operations.
Aftershocks could last for a week
The USGS is forecasting aftershocks of magnitude 3.0 or greater could occur throughout the upcoming week.
Significant aftershock after quake
A significant aftershock was reported in Lake County, California, registering 5.8 on the Richter scale.
Earthquake felt as far away as Eugene, Oregon
Residents in the area reported feeling the quake as far south as Santa Cruz, California, and as far north as Eugene, Oregon, according to the US Geological Survey reporting system.
Earthquake largest in area in decades
The earthquake is the largest to hit Northern California since the 1992 Cape Mendocino earthquake, also with an epicenter in Humboldt County.
Tsunami warning lifted by NOAA
The National Oceanic and Atmospheric Administration lifted an earlier tsunami warning following a 7.3 earthquake in Humboldt County, California.
BART halts underground
Bay Area Rapid Transit announced it was suspending all underground service, and there would be no service in the Transbay Tube due to the earthquake. Riders were urged to seek alternate transit, with MUNI and SAMTRANS providing alternate options.
US Geological Survey upgrades earthquake to 7.3
The earthquake in Humboldt County was initially measured at a magnitude of 6.6 but was upgraded to a 7.0 and then later a 7.3.
The quake was felt around the Bay Area at 10:44 a.m. PT, and a tsunami warning was issued for coastal regions in California up to Oregon. Anyone near water should move to higher ground immediately.
San Francisco Zoo closes
The San Francisco Zoo announced it was closing due to a national weather emergency and tsunami warning. Guests were evacuated and animals secured as staff moved to higher ground.