The primary struck at Three Lakes, Washington, and the second 4km west of the town of Monroe.
There have been no experiences of harm or accidents following these quakes, and a tsunami was not anticipated in line with the US Nationwide Tsunami Warning Centre.
One girl tweeted “we simply had an earthquake right here in Seattle. Our mattress was shaking and hitting the wall,” including it “felt so robust.”
Regardless of no harm or tsunami danger, residents within the space are on edge following two enormous quakes which struck lower than every week in the past.
These quakes had been adopted by hundreds of aftershocks, and residents concern extra are on the best way.
The 7.1 quake which struck on July 5 was felt from Sacramento down the west coast into Mexico – and was probably the most highly effective earthquake to hit California for 20 years.
After the California quake, seismologists have warned Washington state ought to put together for a giant tremor as properly.
Harold Tobin, director of the Pacific Northwest Seismic Community on the College of Washington, warned “one thing comparable might occur in Seattle.”
He informed Komo Information: “For example one on the coast.
“A giant one on the Cascadia fault might be felt strongly in Seattle and might be amplified.
“Our fault that we fear about probably the most for the actually large one for the Pacific Northwest is that this offshore fault referred to as the Cascadia Fault or Cascade Subjection Zone.
“That is the one that might give us the magnitude 9. The massive tsunami.”
Each California and Washington State lie on the explosive ring of fireside, a horseshoe-shaped space within the Pacific Ocean.
This space stretches 25,000-miles lengthy and is house to round 90 p.c of the world’s earthquakes and greater than 75 p.c of the world’s energetic and dormant volcanoes.