UPDATED INFORMATION: 2.5 Quake Shakes Royal City, 4.6 Quake Shakes Monroe WA with a 3.5 Aftershock
Updated: Jul 16, 2019
Updated Information 1:30 pm pst 07/12/2019
MLWA 7 News spoke with the Pacific Northwest Seismic Network (PNSN) and confirmed that the Royal City - Vantage quake was a magnitude 2.5 hit at 3:45am pst with a shallow epicenter. Seismic stations picked up the waves 40 miles away from the epicenter. Steve Malone, also from the PNSN stated that minor shaking could of been felt in neighboring communities but not as strong as it was felt near the epicenter.
"Because it is so shallow the stronger shaking will not go that far away thus may not be felt."
Malone also stated that the quake happened near the Saddle Mountain Anticline Structure, the structure has had seismicity off and on for the past 50 years since monitoring started.
The PNSN does not predict any aftershocks will follow from the Royal City - Vantage quake .
The Monroe earthquake was felt in Downtown Seattle, as well as seismic stations in Central Washington. The quake did not cause any death or injuries or damage to any structures. The 4.6 quake struck at 2:51 am pst and released a 3.5 magnitude aftershock.
The quake was felt in Everett with residents stating that they felt a
"North, South movement"
The quake was 13 miles deep and produces six aftershocks including the M3.5 aftershock following the M4.6 quake. Here's the timeline, according to USGS:
- 2:51 a.m. - 4.6 earthquake
- 2:53 a.m. - 3.5 earthquake
- 2:56 a.m. - 1.7 earthquake
- 2:59 a.m. - 0.9 earthquake
- 3:28 a.m. - 1.6 earthquake
- 3:50 a.m. - 1.5 earthquake
- 4:24 a.m. - 1.2 earthquake
- 4:25 a.m. - 1.7 earthquake
- 5:42 a.m. - 0.8 earthquake
Original Post 9:25am pst 07/12/2019
— Western, Central, Washington
A 2.5 magnitude earthquake shook early Friday morning near Royal City at 3:46 am pst. The epicenter was recorded at 2 miles below ground according to the U.S. Geological Survey
That same night in Western Washington another earthquake with a Magnitude of 3.5 shook the Monroe area with a Magnitude 4.6 aftershock. The epicenter for the first 3.5 quake was under highway US-2 at 13.5 miles deep.
The earthquake was followed by a series of at least eight aftershocks, including a 3.5 earthquake two minutes after the initial quake. That aftershock was nearly 19 miles underground. Here's the timeline, according to USGS:
2:51 a.m. - 4.6 earthquake
2:53 a.m. - 3.5 earthquake
2:56 a.m. - 1.7 earthquake
2:59 a.m. - 0.9 earthquake
3:28 a.m. - 1.6 earthquake
3:50 a.m. - 1.5 earthquake
4:24 a.m. - 1.2 earthquake
4:25 a.m. - 1.7 earthquake
5:42 a.m. - 0.8 earthquake
The Royal City earthquake was 1.87 miles underground and was reportedly felt in Vantage, Mattawa, Warden, and Moses Lake. Both quakes in Central and Western Washington have no Reports of injuries or damages .
This is a developing story and more information will be available