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Minor earthquake, 3.99 mag was detected near Snoqualmie in Washington

Earthquake location 47.5213318S, -121.8239975WA minor earthquake with magnitude 3.99 (ml/mb) was detected on Saturday, 0 kilometers (0 miles) from Snoqualmie in Washington. Exact location of event, longitude -121.8239975 West, latitude 47.5213318 North, depth = 16.28 km. The 3.99-magnitude earthquake has occurred at 15:22:12 / 3:22 pm (local time epicenter). Event ids that are associated to the earthquake: at00nul4sz, uw61064752. Id of event: uw61064752. The earthquake was roughly at a depth of 16.28 km (10 miles). A tsunami warning has been issued near Snoqualmie in Washington (Does not indicate if a tsunami actually did or will exist). Exact time and date of earthquake 12/09/15 / 2015-09-12 22:22:12 / September 12, 2015 @ 10:22 pm UTC/GMT.

Nearest cities/city/villages to epicentrum/hypocenter was Stanwood, Camano, Tanglewilde-Thompson Place (min 5000 pop). The epicenter was 39 km (24 miles) from Seattle (c. 608 700 pop), 55 km (34 miles) from Tacoma (c. 198 400 pop), 30 km (19 miles) from Bellevue (c. 122 400 pop), 58 km (36 miles) from Everett (c. 103 000 pop), 35 km (22 miles) from Kent (c. 92 400 pop), 30 km (19 miles) from Renton (c. 90 900 pop). Country/countries that might be effected, United States (c. 310 233 000 pop).

There are an estimated 130,000 minor quakes in the world each year. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days two and in the last 365 days ten earthquakes of magnitude 3.0 or greater that has occurred nearby.

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 0 km S of Snoqualmie, Washington. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.99 mb The magnitude for the event.
Longitude -121.8239975° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 47.5213318° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 16.28 km Depth of the event in kilometers.
Place 0km S of Snoqualmie, Washington Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-09-12 22:22:12 Time when the event occurred. UTC/GMT
Updated 2015-09-12 22:30:24 Time when the event was most recently updated. UTC/GMT
Timezone offset -420 Timezone offset from UTC in minutes at the event epicenter.
Felt 29 The total number of felt reports
CDI 3.4 The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status automatic Indicates whether the event has been reviewed by a human.
Tsunami 1 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 255 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network uw The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at,uw, A comma-separated list of network contributors.
Number of Stations Used 64 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.09702 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.16 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 34 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID uw61064752 Id of event.
Event Code 61064752 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00nul4sz,uw61064752, A comma-separated list of event ids that are associated to an event.

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