(CNN) -- A magnitude-4.4 earthquake rattled residents of southern California early Tuesday morning, according to the U.S. Geological Survey. 

There were no immediate reports of damage or injuries, authorities said. However, police and fire officials said they had received calls from residents awakened by the quake. Its epicenter was 11 miles east-southeast of the Los Angeles Civic Center, the USGS reported. It struck at 4:04 a.m. 

"First it was a small one and then a big one," said Chris Curiel, who was working at the Vallejo Mini Market in Whittier, a town near the epicenter. "It felt like the floor was sinking." 

He said merchandise on the shelves began shaking, but there was no damage. Because his market is a gas station, earthquakes are a bit more worrisome, he said. 

Curiel said he knew immediately an earthquake was happening, and he has felt one before. 

Ravi Singh, night shift supervisor at a 7-Eleven in Pico Rivera -- the town a mile east-northeast of the epicenter -- told CNN he was making coffee when the store's windows started rattling. There was no damage, he said. "Everything is fine." 

iReporter says "it sounded like there were kids dancing upstairs" 

Although the temblor was centered 11 miles below the Earth's surface, according to USGS, the movement was enough to awaken some southern Californians. 

"It felt like two quick jolts," said CNN's Rosalina Nieves. "I felt some shaking, and I wasn't sure if it was just my upstairs neighbor ... but then you definitely felt two quick jolts." She said the movement lasted for a couple of seconds.  QUESTIONS:

Q1:
1. At what precise time did the earthquake strike?
2. What was the time when the earthquake hit?
3. 
Q2:
1. On what day did the earthquake strike?
2. When was there an earthquake?
3. 
Q3:
1. Was the earthquake near a major city?
2. Did the earthquake strike close to a large metropolis?
3. 
Q4:
1. What city was close to the earthquake?
2. Near what metropolitan center did the earthquake hit?
3. 
Q5:
1. How far away from LA was the earthquake?
2. What was the distance between Los Angeles and the earthquake?
3. 
Q6:
1. Where was Chris Curiel when the earthquake happened?
2. What was Chris Curiel's location at the time of the earthquake?
3. 
Q7:
1. Is Vallejo the location of the Vallejo Mini Market?
2. Can the Vallejo Mini Market be found in Vallejo?
3. 
Q8:
1. Where can the Vallejo Mini Market be found?
2. What is the location of the Vallejo Mini Market?
3. 
Q9:
1. Was just one earthquake felt?
2. Did Californians experience just one earthquake?
3. 
Q10:
1. How was the earthquake experienced?
2. What did the experience of the earthquake feel like?
3. 
Q11:
1. Was Chris Curiel shopping when the earthquake hit?
2. At the time of the earthquake, was Chris Curiel making purchases?
3. 
Q12:
1. What was Chris Curiel doing at the time of the earthquake?
2. What was Chris Curiel up to when the earthquake struck?
3. 
Q13:
1. Were there damages to Chris Curiel's store?
2. Did the earthquake damage anything in Chris Curiel's shop?
3. 
Q14:
1. Did Chris Curiel have a particular reason for concern?
2. Was there anything specific that had Chris Curiel worried?
3. 
Q15:
1. Why was Chris Curiel concerned?
2. What had Chris Curiel worried?
3. 
