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Cracks and fallen brick are seen in the main post office following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness.(AP Photo/Eric Risberg)

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Bricks and fallen rubble cover a car with the old courthouse in the background following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Rubble covers the sidewalk in front of the Vintners Collective multi-winery tasting room following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness.(AP Photo/Eric Risberg)

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Louis Secreto works at cleaning the storefront window of the Napa Running Company following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Will Wright, left, and Joe Pfeifer, right, clean up the broken windows of a restaurant following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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A broken mannequin and storefront window are on First Street following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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A Safeway employee cleans up merchandise which fell due to an earthquake Sunday, Aug. 24, 2014, in American Canyon, Calif. Officials say an earthquake with a preliminary magnitude of 6.0 has been reported in California's northern San Francisco Bay area. (AP Photo/Ben Margot)

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A reporter does a standup in front of the damaged Vintners Collective multi-winery tasting room following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness.(AP Photo/Eric Risberg)

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AP

Nina Quidit cleans up the Dollar Plus and Party Supplies Store in American Canyon Calif. after an earthquake on Sunday Aug. 24, 2014. Quidit and her husband were woken up in the early morning hours by the store's alarm company and immediately drove in to begin clean up. The 6.0-magnitude quake caused six significant fires, including at four mobile homes, Napa Division Fire Chief Darren Drake said. (AP Photo/Alex Washburn)

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People look at a damaged building with a top corner exposed following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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AP

Products litter the floor of the Dollar Plus and Party Supplies Store in American Canyon, Calif., Sunday, Aug. 24, 2014. Owners Nina and Marc Quidit were woken up in the early morning hours by the store's alarm company and immediately drove in to begin cleaning up. (AP Photo/Alex Washburn)

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A building is partially collapsed due to a 6.0-magnitude earthquake, Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Ben Margot)

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Rubble covers the sidewalk in front of the Vintners Collective multi-winery tasting room following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness.(AP Photo/Eric Risberg)

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AP

Nina Quidit cleans up the Dollar Plus and Party Supplies Store in American Canyon Calif., after an earthquake on Sunday, Aug. 24, 2014. Quidit and her husband were woken up in the early morning hours by the store's alarm company and immediately drove in to begin cleaning up. (AP Photo/Alex Washburn)

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Louis Secreto works at cleaning the storefront window of the Napa Running Company following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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People walk past a tumbled mannequin and broken storefront window on First Street following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness.(AP Photo/Eric Risberg)

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Will Wright, left, and Joe Pfeifer, right, clean up the broken windows of a restaurant following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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The top corner of a building is exposed following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness.(AP Photo/Eric Risberg)

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AP

Bricks are in the street after a building was damaged during an earthquake in Napa, Calif., Sunday, Aug. 24, 2014. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, knocking out power to thousands and sending residents running out of their homes in the darkness. (AP Photo/Ellen Knickmeyer)

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This photo provided by Lyall Davenport shows damage to a building in Napa, Calif. early Sunday, Aug. 24, 2014. Officials say an earthquake with a preliminary magnitude of 6.0 has been reported in California's northern San Francisco Bay area. (AP Photo/Lyall Davenport)

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A Safeway employee cleans up merchandise which fell due to an earthquake Sunday, Aug. 24, 2014, in American Canyon, Calif. Officials say an earthquake with a preliminary magnitude of 6.0 has been reported in California's northern San Francisco Bay area. (AP Photo/Ben Margot)

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Jean Meehan looks over the damage to her JHM Stamp and Collectibles store following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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A woman looks at the damage windows of the main post office following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Water flows out of McCaulous's department store past a broken storefront window following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Gurbir Bhandahl, an employee at a 7-Eleven store, cleans up after an earthquake Sunday, Aug. 24, 2014, in American Canyon, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Rich Pedroncelli)

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People watch as water flows out of McCaulous's department store following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Alan Mathison works at cleaning up a broken storefront window following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Jorge Sanchez looks over damage to the main post office following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Police tape blocks the entrance to the damaged main post office following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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A man photographs damage to a post office in Napa, Calif., following an earthquake Sunday, Aug. 24, 2014. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness (AP Photo/Noah Berger)

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An awning for Carpe Diem wine bar sits among rubble in Napa, Calif., following an earthquake Sunday, Aug. 24, 2014. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Noah Berger)

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Cans and bottles litter the floor of cold box at a 7-Eleven store after an earthquake Sunday, Aug. 24, 2014, in American Canyon, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Rich Pedroncelli)

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People watch as water flows out of McCaulous's department store following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Jorge Sanchez, left, and Rob Doughty, right, look over damage to the main post office following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage in California's northern Bay Area early Sunday, sending at least 70 people to a hospital, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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AP

Owner Mari Lou Abadilla works to clean 3J's Oriental Market after a large earthquake in Vallejo Calif. on Sunday Aug. 24, 2014. Abadilla owns two stores in the area with her husband and said the second store was not as badly hit. A large earthquake caused significant damage and left three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Alex Washburn)

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AP

Jose Dizon takes a photo of the damage at 3J's Oriental Market after a large earthquake in Vallejo Calif. on Sunday Aug. 24, 2014. Owners Mari Lou and Engracio Abadilla say their second store in the area was not as badly damaged as 3J's. A large earthquake caused significant damage and left three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Alex Washburn)

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A store employee inspects the damage at 3J's Oriental Market after a large earthquake in Vallejo Calif. on Sunday Aug. 24, 2014. Owners Mari Lou and Engracio Abadilla say their second store in the area was not as badly damaged as 3J's. A large earthquake caused significant damage and left three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Alex Washburn)

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Bricks and rubble cover the sidewalk in front of a heavily damaged building following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage and left three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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AP

Romy Abad inspects the damage at 3J's Oriental Market after a large earthquake in Vallejo Calif. on Sunday Aug. 24, 2014. Owners Mari Lou and Engracio Abadilla say their second store in the area was not as badly damaged as 3J's. A large earthquake caused significant damage and left three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Alex Washburn)

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Two men on bicycles ride past the Vintners Collective tasting room and look at damage following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage and left three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Tyler Dahl looks over stainless steel wine barrels that fell following an earthquake at Dahl Vineyards Sunday, Aug. 24, 2014, in Yountville, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Tyler Dahl, left, and his father Robert work at removing wine barrels from a damaged rack following an earthquake at Dahl Vineyards Sunday, Aug. 24, 2014, in Yountville, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Tyler Dahl looks over a $16,000 barrel of Pinot Noir wine that fell from a rack and broke open after an earthquake at Dahl Vineyards Sunday, Aug. 24, 2014, in Yountville, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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Janelle Dahl and her son Austin clean up broken bottles of wine in a tasting room after an earthquake at Dahl Vineyards Sunday, Aug. 24, 2014, in Yountville, Calif. A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Eric Risberg)

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AP

Napa firemen douse the remains of a mobile home Sunday, Aug. 24, 2014, at the Napa Valley Mobile Home Park, in Napa, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Ben Margot)

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A family surveys damage along Second St. in Napa, Calif., following an earthquake Sunday, Aug. 24, 2014. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Noah Berger)

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AP

An angel statue which lost its feet during the earthquake is seen Sunday, Aug. 24, 2014, at the Napa Valley Mobile Home Park, in Napa, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Ben Margot)

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A corner of the historic Napa County Courthouse sits exposed following an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Noah Berger)

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A mailbox is all that remains of one of four mobile homes which were destroyed in a gas fire Sunday, Aug. 24, 2014, at the Napa Valley Mobile Home Park, in Napa, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Ben Margot)

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A mobile home is seen knocked off its foundation at the Napa Valley Mobile Home Park, in Napa, Calif., after an early morning earthquake struck California's northern San Francisco Bay area Sunday, Aug. 24, 2014. (AP Photo/Ben Margot)

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AP

A Napa firefighter inspects mobile homes that were destroyed Sunday, Aug. 24, 2014, at the Napa Valley Mobile Home Park, in Napa, Calif. A gas fire destroyed four homes at the park after an earthquake struck California's northern San Francisco Bay area early Sunday morning. (AP Photo/Ben Margot)

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A youngster rides his scooter over a sidewalk buckled by an earthquake Sunday, Aug. 24, 2014, in Napa, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Rich Pedroncelli)

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AP

Steve Brody attempts entry into his mobile home, which was knocked off its foundation, Sunday, Aug. 24, 2014, at the Napa Valley Mobile Home Park, in Napa, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Ben Margot)

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The remains of a mobile home are seen after a gas fire destroyed it as the result of a magnitude 6.0 earthquake Sunday, Aug. 24, 2014, at the Napa Valley Mobile Home Park, in Napa, Calif. A large earthquake caused significant damage and left at least three critically injured in California's northern Bay Area early Sunday, igniting fires, sending at least 87 people to a hospital, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. (AP Photo/Ben Margot)

NAPA — A large earthquake rolled through California's northern Bay Area early Sunday, damaging some buildings, igniting fires, knocking out power to tens of thousands and sending residents running out of their homes in the darkness. Here are photos from Associated Press, along with photos from those in Napa via social media.