Traffic on the Golden Gate Bridge. The bridge spans San Francisco Bay and connects San Francisco and Marin Counties. It was designed by Joseph Baermann Strauss and was opened to the public in 1937. (Photo by James Leynse/Corbis via Getty Images)
PHOTO: James Leynse/Corbis via Getty Images
Traffic on the Golden Gate Bridge. The bridge spans San Francisco Bay and connects San Francisco and Marin Counties. It was designed by Joseph Baermann Strauss and was opened to the public in 1937. (Photo by James Leynse/Corbis via Getty Images)
Now playing
01:35
5 things you should know about earthquakes
earthquake early warning system orig mg_00002310.jpg
earthquake early warning system orig mg_00002310.jpg
Now playing
01:38
Why aren't earthquake warnings better?
orig 5 most powerful earthquakes on record npr_00002704.jpg
orig 5 most powerful earthquakes on record npr_00002704.jpg
Now playing
01:03
5 most powerful recorded earthquakes
weather 15 years of earthquakes jj nccorig_00004316.jpg
PHOTO: NOAA
weather 15 years of earthquakes jj nccorig_00004316.jpg
Now playing
00:47
See 15 years of earthquakes in 45 seconds
ring of fire chad myers weather orig_00003221.jpg
ring of fire chad myers weather orig_00003221.jpg
Now playing
01:13
What is the 'Ring of Fire'?
A resident sifts through debris past the rubble of a mosque in Palu, Indonesia's Central Sulawesi following the September 28 earthquake and tsunami.
PHOTO: ADEK BERRY/AFP/AFP/Getty Images
A resident sifts through debris past the rubble of a mosque in Palu, Indonesia's Central Sulawesi following the September 28 earthquake and tsunami.
Now playing
01:52
Search for survivors after tsunami continues
indonesia earthquake tsunami palu orig mg_00000711.jpg
PHOTO: Indonesia's Disaster Management Agency
indonesia earthquake tsunami palu orig mg_00000711.jpg
Now playing
01:06
Deadly tsunami hits Indonesian island of Sulawesi
honduras earthquake map 1.09.2018
PHOTO: CNN
honduras earthquake map 1.09.2018
Now playing
00:50
Strong earthquake prompts tsunami threat
Anuwat Kongko, a 28-year-old hiker from Thailand, was on top of Mount Rinjani when the earthquake hit.
 
"I reached the summit [Mont Rinjani] at around 6am along with some friends. Then I spent some time taking pictures with my camera with my friends until 6.47am, when the 1st earthquake occurred. It's just like the mountain was shaking. Everyone crouched on the floor and after it stopped I started to run away from there.
 
"After 10minutes an aftershock happened. Then, everyone was told to move out from there pretty quickly (you can see it in my video). Some of the pathway was destroyed by the earthquake."
 
Kongko said it took them 1 hour to get from the summit to the camping area, and 3 hours from the camping area to the village.
PHOTO: Anuwat Kongko
Anuwat Kongko, a 28-year-old hiker from Thailand, was on top of Mount Rinjani when the earthquake hit. "I reached the summit [Mont Rinjani] at around 6am along with some friends. Then I spent some time taking pictures with my camera with my friends until 6.47am, when the 1st earthquake occurred. It's just like the mountain was shaking. Everyone crouched on the floor and after it stopped I started to run away from there. "After 10minutes an aftershock happened. Then, everyone was told to move out from there pretty quickly (you can see it in my video). Some of the pathway was destroyed by the earthquake." Kongko said it took them 1 hour to get from the summit to the camping area, and 3 hours from the camping area to the village.
Now playing
01:23
Hundreds of hikers rescued after earthquake
(CNN) —  

A 4.4 magnitude earthquake struck early Thursday in Berkeley, California, according to a preliminary report from the US Geological Survey, jolting some residents of the densely populated San Francisco Bay area awake in their beds.

The earthquake hit at 2:39 a.m. local time (5:39 a.m. ET), centered near the Berkeley-Oakland boundary.

There were no immediate reports of damage in the area, the state Governor’s Office of Emergency Services said.

Some residents in the area told CNN affiliate KPIX that the quake shook them awake. A quake of this intensity generally would produce moderate shaking felt by nearly everyone near the epicenter, awakening many people and having the potential to break some windows and dishes, the USGS says.

“It shook our house and shook the bed big time,” Gina Solis of San Rafael, across the San Francisco Bay from Berkeley, told KPIX.

In Hayward, a few miles southeast of Oakland, Robert Hilton says he woke up to a sensation that something might be running into his house.

“I thought a car hit my house,” Hilton told CNN affiliate KRON. “I got up and checked outside and there was nothing.”

The area’s commuter trains will be delayed in the morning so that inspectors can check the tracks, Bay Area Rapid Transit said on Twitter.

The Hayward Fault passes through Berkeley and extends through several cities on the east side of the Bay Area.

CNN’s Madison Park reported from San Francisco, and Jason Hanna wrote from Atlanta. CNN’s Augie Martin contributed to this report.