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Minor earthquake: M2.8 quake has struck near Tonkawa in Oklahoma



Earthquake location 36.5746S, -97.3939WA minor earthquake with magnitude 2.8 (ml/mb) was detected on Wednesday, 13 kilometers (8 miles) from Tonkawa in Oklahoma. Global time and date of event 23/09/15 / 2015-09-23 21:38:43 / September 23, 2015 @ 9:38 pm UTC/GMT. Id of earthquake: us20003nqj. Event ids that are associated: us20003nqj. Exact location of event, longitude -97.3939 West, latitude 36.5746 North, depth = 6.759 km. The 2.8-magnitude earthquake was detected at 16:38:43 / 4:38 pm (local time epicenter). The epicenter of the earthquake was roughly 6.759 km (4 miles) below the earth’s surface.

Nearby country/countries, United States (c. 310 233 000 pop) (That might be effected). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Wellington, Arkansas City, Stillwater. Epicenter of the earthquake was 48 km (30 miles) from Enid (c. 49 400 pop), 59 km (37 miles) from Stillwater (c. 45 700 pop), 31 km (19 miles) from Ponca City (c. 25 400 pop), 63 km (39 miles) from Arkansas City (c. 12 400 pop), 77 km (48 miles) from Wellington (c. 8 200 pop).

Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. There are an estimated 1,300,000 minor quakes in the world each year. In the past 24 hours, there have been fifty-one, in the last 10 days seventy-three, in the past 30 days ninety-nine and in the last 365 days seven hundred and seventy-three earthquakes of magnitude 3.0 or greater that was reported nearby.

How would you describe the shaking?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 13 km SSW of Tonkawa, Oklahoma.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -97.3939° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.5746° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 6.759 km Depth of the event in kilometers.
Place 13km SSW of Tonkawa, Oklahoma Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-09-23 21:38:43 Time when the event occurred. UTC/GMT
Updated 2015-10-23 03:17:36 Time when the event was most recently updated. UTC/GMT
Timezone offset -300 Timezone offset from UTC in minutes at the event epicenter.
Felt 1 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 reviewed Indicates whether the event has been reviewed by a human.
Tsunami 0 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 121 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,us, A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.7 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 53 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 us20003nqj Id of event.
Event Code 20003nqj An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20003nqj, A comma-separated list of event ids that are associated to an event.

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