Minor earthquake, 3.3 mag was detected near Helena in Oklahoma

A minor earthquake magnitude 3.3 (ml/mb) strikes 12 kilometers (7 miles) from Helena in Oklahoma on Friday. The earthquake occurred at a depth of 5 km (3 miles) below the earth’s surface. The temblor was reported at 17:09:29 / 5:09 pm (local time epicenter). Exact location of event, longitude -98.3691 West, latitude 36.6286 North, depth = 5 km. Global time and date of event 20/11/15 / 2015-11-20 23:09:29 / November 20, 2015 @ 11:09 pm UTC/GMT. Event id: us10003zyv. Ids that are associated to the earthquake: us10003zyv.

Close country/countries, United States (c. 310 233 000 pop) (That might be effected). Earthquake epicenter was 51 km (32 miles) from Enid (c. 49 400 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Enid.

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

Did you feel anything?

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 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: 12 km NW of Helena, Oklahoma.

More information

Parameter	Value	Description
Magnitude	3.3 mb	The magnitude for the event.
Longitude	-98.3691° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	36.6286° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	5 km	Depth of the event in kilometers.
Place	12km NW 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	2015-11-20 23:09:29	Time when the event occurred. UTC/GMT
Updated	2015-11-20 23:19:46	Time when the event was most recently updated. UTC/GMT
Timezone offset	-360	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	168	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	0.216	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.95 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	40	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	us10003zyv	Id of event.
Event Code	10003zyv	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us10003zyv,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.3 mag was detected near Helena in Oklahoma

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