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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.4 mag, 29 km ENE of Iwaki, Japan


Earthquake location 37.1126S, 141.2016WA light earthquake with magnitude 4.4 (ml/mb) was detected on Friday, 29 kilometers (18 miles) from Iwaki in Japan. Unique identifier: us2000j202. Ids that are associated to the event: us2000j202. Exact location, longitude 141.2016° East, latitude 37.1126° North, depth = 52.16 km. The temblor was reported at 13:13:32 / 1:13 pm (local time epicenter). Global date and time of event UTC/GMT: 21/12/18 / 2018-12-21 04:13:32 / December 21, 2018 @ 4:13 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake was roughly at a depth of 52.16 km (32 miles).

Earthquake epicenter was 29 km (18 miles) from Iwaki (c. 357 300 pop), 79 km (49 miles) from Kōriyama (c. 340 600 pop), 75 km (47 miles) from Hitachi (c. 186 300 pop), 75 km (47 miles) from Sukagawa (c. 68 800 pop), 54 km (34 miles) from Kitaibaraki (c. 50 800 pop), 86 km (53 miles) from Nihommatsu (c. 36 300 pop). Nearest cities/city/towns to hypocenter/epicentrum was Ōmiya, Funaishikawa, Nihommatsu (min 5000 pop). Close country/countries, Japan (c. 127 288 000 pop) (That might be effected).

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

How would you describe the shaking?

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 29 km ENE of Iwaki, Japan.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude 141.2016° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.1126° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 52.16 km Depth of the event in kilometers.
Place 29km ENE of Iwaki, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-12-21 04:13:32 Time when the event occurred. UTC/GMT
Updated 2019-01-10 06:19:10 Time when the event was most recently updated. UTC/GMT
Timezone offset 540 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 298 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 0.823 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.81 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 125 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 us2000j202 Id of event.
Event Code 2000j202 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000j202, A comma-separated list of event ids that are associated to an event.

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