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Light earthquake: M4.1 quake has struck near Hennessey in Oklahoma


Earthquake location 36.0422S, -97.9035WA light earthquake magnitude 4.1 (ml/mb) strikes 7 kilometers (4 miles) from Hennessey in Oklahoma on Tuesday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, -97.9035° West, 36.0422° North, depth 3.39 km. The temblor was detected at 03:50:51 / 3:50 am (local time epicenter). The earthquake was roughly at a depth of 3.39 km (2 miles). Exact time and date of earthquake 31/10/17 / 2017-10-31 09:50:51 / October 31, 2017 @ 9:50 am UTC/GMT. Id of earthquake: us1000ayy1. Event ids that are associated: us1000ayy1.

Close country/countries that might be effected, United States (c. 310 233 000 pop). Nearest cities/city/towns to hypocenter/epicentrum was Harrah, Moore, Tuttle (min 5000 pop). Earthquake epicenter was 73 km (45 miles) from Oklahoma City (c. 580 000 pop), 58 km (36 miles) from Edmond (c. 81 400 pop), 87 km (54 miles) from Moore (c. 55 100 pop), 80 km (50 miles) from Midwest City (c. 54 400 pop), 39 km (24 miles) from Enid (c. 49 400 pop), 76 km (47 miles) from Stillwater (c. 45 700 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days four, in the past 30 days eight and in the last 365 days one hundred and ninety earthquakes of magnitude 3.0 or greater that has occurred nearby. There are an estimated 13,000 light earthquakes in the world each year.

Did you feel it?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 7 km S of Hennessey, Oklahoma.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -97.9035° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.0422° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 3.39 km Depth of the event in kilometers.
Place 7km S of Hennessey, Oklahoma Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-31 09:50:51 Time when the event occurred. UTC/GMT
Updated 2017-10-31 10:02:47 Time when the event was most recently updated. UTC/GMT
Timezone offset -360 Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI 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 259 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 0.191 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.33 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 31 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 us1000ayy1 Id of event.
Event Code 1000ayy1 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000ayy1, A comma-separated list of event ids that are associated to an event.

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