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Light earthquake: M4.5 quake has struck near Medford in Oklahoma


Earthquake location 36.7463S, -98.0151WA light earthquake magnitude 4.5 (ml/mb) strikes 26 kilometers (16 miles) from Medford in Oklahoma on Monday. Global date and time of event UTC/GMT: 30/11/15 / 2015-11-30 09:49:13 / November 30, 2015 @ 9:49 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us1000424d. Event ids that are associated: us1000424d. The epicenter was at a depth of 5 km (3 miles). Exact location of earthquake, longitude -98.0151 West, latitude 36.7463 North, depth = 5 km. The temblor was picked up at 03:49:13 / 3:49 am (local time epicenter).

Event epicenter was 41 km (25 miles) from Enid (c. 49 400 pop), 83 km (52 miles) from Ponca City (c. 25 400 pop), 94 km (58 miles) from Arkansas City (c. 12 400 pop), 81 km (50 miles) from Wellington (c. 8 200 pop), 66 km (41 miles) from Blackwell (c. 7 100 pop), 82 km (51 miles) from Perry (c. 5 100 pop). Nearest cities/city/villages to epicentrum/hypocenter was Arkansas City, Ponca City, Perry (min 5000 pop). Close country/countries that might be effected, United States (c. 310 233 000 pop).

In the past 24 hours, there have been one, in the last 10 days eighteen, in the past 30 days fifty-seven and in the last 365 days six hundred and nine earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light quakes in the world each year.

Questions or comments?

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: 26 km WSW of Medford, Oklahoma. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -98.0151° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.7463° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 5 km Depth of the event in kilometers.
Place 26km WSW of Medford, Oklahoma Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-11-30 09:49:13 Time when the event occurred. UTC/GMT
Updated 2015-11-30 10:14:05 Time when the event was most recently updated. UTC/GMT
Timezone offset -360 Timezone offset from UTC in minutes at the event epicenter.
Felt 762 The total number of felt reports
CDI 5.8 The maximum reported intensity for the event.
MMI 5 The maximum estimated instrumental intensity for the event.
Alert Level green 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 753 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 0.163 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.57 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 105 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us1000424d Id of event.
Event Code 1000424d An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000424d, A comma-separated list of event ids that are associated to an event.

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