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Minor earthquake 2.8 mag, 7 km NNE of Helena, Oklahoma



Earthquake location 36.601S, -98.2273WA minor earthquake magnitude 2.8 (ml/mb) has struck on Sunday, 7 kilometers (4 miles) from Helena in Oklahoma. Date and time of earthquake in UTC/GMT: 04/10/15 / 2015-10-04 19:53:56 / October 4, 2015 @ 7:53 pm. Exact location of earthquake, longitude -98.2273 West, latitude 36.601 North, depth = 5 km. Event id: us10003k90. Ids that are associated to the earthquake: us10003k90. The temblor was reported at 14:53:56 / 2:53 pm (local time epicenter). The earthquake occurred at a depth of 5 km (3 miles) below the earth’s surface.

Nearest cities/city/villages to epicentrum/hypocenter was Enid (min 5000 pop). Epicenter of the event was 39 km (24 miles) from Enid (c. 49 400 pop). Country/countries that might be effected, United States (c. 310 233 000 pop).

There are an estimated 1,300,000 minor earthquakes in the world each year. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. In the past 24 hours, there have been 0, in the last 10 days ten, in the past 30 days thirty-one and in the last 365 days five hundred and eighty-seven earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel the quake?

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 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: 7 km NNE of Helena, Oklahoma.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -98.2273° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.601° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 5 km Depth of the event in kilometers.
Place 7km NNE 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 2015-10-04 19:53:56 Time when the event occurred. UTC/GMT
Updated 2015-10-04 20:03:33 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 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 0.202 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.23 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 154 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb_lg The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us10003k90 Id of event.
Event Code 10003k90 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10003k90, A comma-separated list of event ids that are associated to an event.

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