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Minor World Earthquakes Magnitude -3.9

Minor earthquake, 3.1 mag strikes near Helena in Oklahoma


Earthquake location 36.5264S, -98.4653WA minor earthquake magnitude 3.1 (ml/mb) has struck on Saturday, 17 kilometers (11 miles) from Helena in Oklahoma. The temblor was reported at 16:52:09 / 4:52 pm (local time epicenter). The earthquake occurred at a depth of 5 km (3 miles). Exact location of earthquake, longitude -98.4653 West, latitude 36.5264 North, depth = 5 km. Event id: us20002y6w. Ids that are associated to the earthquake: us20002y6w. Exact time and date of earthquake 11/07/15 / 2015-07-11 21:52:09 / July 11, 2015 @ 9:52 pm UTC/GMT.

Nearest cities/city/villages to epicentrum/hypocenter was Watonga, Enid (min 5000 pop). Nearby country/countries that might be effected, United States (c. 310 233 000 pop). Epicenter of the event was 54 km (34 miles) from Enid (c. 49 400 pop), 76 km (47 miles) from Watonga (c. 5 100 pop).

In the past 24 hours, there have been thirty-one, in the last 10 days fourty, in the past 30 days sixty-seven and in the last 365 days five hundred and twenty-four earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. There are an estimated 130,000 minor earthquakes in the world each year.

Did you feel the quake?

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 17 km W of Helena, Oklahoma.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -98.4653° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.5264° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 5 km Depth of the event in kilometers.
Place 17km W 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 2015-07-11 21:52:09 Time when the event occurred. UTC/GMT
Updated 2015-07-31 03:51:15 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 148 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 0.48 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 103 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 us20002y6w Id of event.
Event Code 20002y6w An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20002y6w, A comma-separated list of event ids that are associated to an event.

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