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Minor earthquake, 2.9 mag has occurred near Helena in Oklahoma


Earthquake location 36.677S, -98.086WA minor earthquake magnitude 2.9 (ml/mb) has occurred on Wednesday, 21 kilometers (13 miles) from Helena in Oklahoma. The temblor was picked up at 10:09:49 / 10:09 am (local time epicenter). All ids that are associated to the event: us20006g6g. Unique identifier: us20006g6g. The epicenter of the earthquake was roughly 4.7 km (3 miles) below the earth’s surface. Exact location of event, longitude -98.086 West, latitude 36.677 North, depth = 4.7 km. Exact time and date of event in UTC/GMT: 20/07/16 / 2016-07-20 15:09:49 / July 20, 2016 @ 3:09 pm.

Country/countries that might be effected, United States (c. 310 233 000 pop). Nearest cities/city/towns to hypocenter/epicentrum was Blackwell, Enid (min 5000 pop). Event epicenter was 36 km (23 miles) from Enid (c. 49 400 pop), 73 km (45 miles) from Blackwell (c. 7 100 pop).

In the past 24 hours, there have been four, in the last 10 days nine, in the past 30 days thirty-one and in the last 365 days four hundred and fifty-six earthquakes of magnitude 3.0 or greater that have been detected nearby. Each year there are an estimated 1,300,000 minor earthquakes in the world. Earthquakes 2.5 to 3.0 are often felt, but only causes minor damage.

Did you feel it?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 21 km NE of Helena, Oklahoma. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.9 mb The magnitude for the event.
Longitude -98.086° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.677° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 4.7 km Depth of the event in kilometers.
Place 21km NE of Helena, Oklahoma Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-07-20 15:09:49 Time when the event occurred. UTC/GMT
Updated 2016-07-26 03:11:34 Time when the event was most recently updated. UTC/GMT
Timezone offset -300 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 129 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 0.35 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 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 us20006g6g Id of event.
Event Code 20006g6g An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20006g6g, A comma-separated list of event ids that are associated to an event.

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