A series of minor earthquakes hit Reno city, Nevada in northern California on Thursday afternoon causing no immediate injuries.

The temblors are probably aftershocks from the 6.0 quake that rattled Nevada in February, the largest in 14 years.

According to the U.S. Geological Survey, the strongest quake with a magnitude of 4.2 occurred at 3:55 p.m. PT and was centered 6 miles of Reno. It shook downtown for about 30 seconds just before 4 p.m. and followed a 4.1-magnitude quake minutes earlier.

“It shook the whole house real good. This was the strongest one in the last two months. I was wondering whether I should grab the kid and get under the table. You could see the sides of the house swaying,” said Rick Dinoso, a resident of the northwest part of town, according to the Associated Press.

The USGS said there were about 30 quakes over about a two-hour period that measured 1.0 or more on the Richter scale.

“The activity west of Reno is unusual in that the largest earthquakes of the series have been the latest to occur. This is out of the normal pattern of main shock followed by smaller aftershocks, such as has occurred with the Wells, Nevada, earthquake of Feb. 21. The persistence of this particular earthquake slightly increases this probability for a significant earthquake in west Reno. However, the occurrence of additional earthquake activity in the Mogul area cannot be predicted or forecast,” the Nevada Seismological Laboratory at the University of Nevada, Reno said in a statement, according to local Reno Gazette Journal.

Fortunately, no injuries or major damage were reported.