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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.1 mag, 29 km ENE of Oarai, Japan

Earthquake location 36.3871S, 140.9145WA light earthquake magnitude 4.1 (ml/mb) has struck on Wednesday, 29 kilometers (18 miles) from Oarai in Japan. Date and time of earthquake in UTC/GMT: 23/12/15 / 2015-12-23 00:33:57 / December 23, 2015 @ 12:33 am. Exact location of earthquake, longitude 140.9145 East, latitude 36.3871 North, depth = 36.42 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: us10004b6p. Ids that are associated to the event: us10004b6p. The temblor was reported at 09:33:57 / 9:33 am (local time epicenter). The earthquake occurred at a depth of 36.42 km (23 miles).

Close country/countries, Japan (c. 127 288 000 pop) (That might be effected). Event epicenter was 74 km (46 miles) from Iwaki (c. 357 300 pop), 42 km (26 miles) from Mito-shi (c. 246 500 pop), 33 km (21 miles) from Hitachi (c. 186 300 pop), 76 km (47 miles) from Tsukuba (c. 175 600 pop), 34 km (21 miles) from Hitachi-Naka (c. 156 800 pop), 34 km (21 miles) from Katsuta (c. 156 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Ujiie, Ishige, Kaminokawa.

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

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 29 km ENE of Oarai, Japan. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 140.9145° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.3871° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 36.42 km Depth of the event in kilometers.
Place 29km ENE of Oarai, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-12-23 00:33:57 Time when the event occurred. UTC/GMT
Updated 2016-01-07 23:04:46 Time when the event was most recently updated. UTC/GMT
Timezone offset 540 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 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 0.605 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.28 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 171 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 us10004b6p Id of event.
Event Code 10004b6p An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10004b6p, A comma-separated list of event ids that are associated to an event.

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