The survey said more than 50 of the aftershocks were large enough to be felt, and 38 were at least the size of the May 15 shock.
The survey’s report on where the May 15 aftershock was felt indicated that one person in the immediate Washington area had told of feeling it. The report came from Hyattsville, the USGS said.
Scientists expected that the aftershocks “will continue for many months,” the survey said.
Meanwhile, the recent completion of the scaffolding around the Washington Monument provides a vivid visual symbol of the August 2011 quake. The scaffolding is required for repairs caused by that quake.
The precise cause of the sinkhole that opened in downtown Washington has not been specified. But it nevertheless appeared to reflect to some degree the geological conditions beneath the pavement at 14th and F streets NW.
Restrictions on travel by automobile in that area apparently may continue for some time, while repairs are carried out.
In a message sent by the District’s transportation department Friday, officials said the closures “may go thru 5/27.”
However, officials said they planned to make a virtue of necessity. “While these closures continue we plan to resurface stretches of the now closed area,” the DOT said online.
If not much warmer than Friday, the rest of this weekend should be brighter, according to the National Weather Service forecast.
It called for Saturday to be sunny, with highs in the upper 60s. Winds would persist, however, with gusts as high as 30 mph, the weather service said.
Sunday highs were expected to climb into the lower 70s, with winds in the 10 to 15 mph range.
On Monday, the forecasters said, it would be sunny, with high temperatures in the middle 70s.
In Friday’s proclamation, the president said “it is never too early” to get ready for this year’s hurricane season.
He urged families to discuss what to do in a disaster and develop a plan that everyone knows.