Note: Map shows the area with a shake intensity of 3 or greater, which U.S.G.S. defines as “weak,” though the earthquake may be felt outside the areas shown. The New York Times
A minor, 3.8-magnitude earthquake struck in Nevada on Thursday, according to the United States Geological Survey. The earthquake prompted a flurry of chatter online, but no widespread damage was reported.
The temblor happened at 1:47 p.m. Pacific time about 7 miles northwest of Summerlin South, Nev., data from the agency shows.
On social media, residents across the area described the earthquake jolting their homes and rattling windows and doors. Some said they heard the boom-like sound of an explosion, while others said they didn’t feel anything or described a small disturbance that lacked any significant oomph.
Brian Cohen was at home putting away groceries in Lone Mountain, about a half hour west of the Las Vegas strip, just before 2 p.m. when he felt the entire house rattle intensely for about three seconds.
“The whole house felt like it was lifting up,” said Mr. Cohen, who is in his 60s. He went outside and saw a neighbor, who also reported feeling the jolt.
Mr. Cohen, who has lived in the Las Vegas area since 1994, said this wasn’t his first earthquake. “This one is the strongest one I felt,” he said, adding there was no damage to his home.
As seismologists review available data, they may revise the earthquake’s reported magnitude. Additional information collected about the earthquake may also prompt U.S.G.S. scientists to update the shake-severity map.
Aftershocks forecast
While individual earthquakes can’t be predicted, geologists can calculate the chances that more earthquakes will follow an initial quake using statistical models of past events.
For this earthquake, it is unlikely — about a 4 chance — that a larger quake will strike the area in the next day, according to the U.S.G.S. Here is the forecast for aftershocks of other sizes:
3.0 mag. or stronger
Perhaps
26%
—
4.0 magazine. or stronger
Unlikely
5%
—
5.0 magazine. or stronger
Unlikely
<1%
—
Source: United States Geological Survey. William B. Davis, Joel Eastwood and John Keefe/The New York Times
The rate of aftershocks typically decreases over time, and forecasts are available for the next week, month and year.
Aftershocks detected
Subsequent quakes have been reported in the same area. Such temblors are typically aftershocks caused by minor adjustments along the portion of a fault that slipped at the time of the initial earthquake.
Quakes and aftershocks inside 100 miles
Aftershocks can occur days, weeks or even years after the first earthquake. These events can be of equal or larger magnitude to the initial earthquake, and they can continue to affect already damaged locations.
When quakes and aftershocks occurred
The New York Times
Sources: United States Geological Survey (epicenter, aftershocks, shake intensity); LandScan via Oak Ridge National Laboratory (population density) | Notes: Shaking categories are based on the Modified Mercalli Intensity scale. When aftershock data is available, the corresponding maps and charts include earthquakes within 100 miles and seven days of the initial quake. All times above are Pacific time. Shake data is as of Thursday, June 4 at 5:25 p.m. Eastern. Aftershocks data is as of Thursday, June 4 at 6:32 p.m. Eastern.
