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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag has occurred near Iwaki in Japan

Earthquake location 37.1571S, 141.3539WA light earthquake magnitude 4.1 (ml/mb) strikes 43 kilometers (27 miles) from Iwaki in Japan on Saturday. Id of earthquake: us20008j2b. Event ids that are associated: us20008j2b. Global date and time of event UTC/GMT: 10/02/17 / 2017-02-10 21:38:59 / February 10, 2017 @ 9:38 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 141.3539 East, latitude 37.1571 North, depth = 10 km. The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. The temblor was reported at 06:38:59 / 6:38 am (local time epicenter).

Earthquake epicenter was 43 km (27 miles) from Iwaki (c. 357 300 pop), 90 km (56 miles) from Kōriyama (c. 340 600 pop), 88 km (55 miles) from Hitachi (c. 186 300 pop), 87 km (54 miles) from Sukagawa (c. 68 800 pop), 68 km (42 miles) from Kitaibaraki (c. 50 800 pop), 75 km (47 miles) from Takahagi (c. 33 600 pop). Nearest cities/city/towns to hypocenter/epicentrum was Kōriyama, Hitachi, Sukagawa (min 5000 pop). Country/countries that might be effected, Japan (c. 127 288 000 pop).

Each year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been two, in the last 10 days seven, in the past 30 days ten and in the last 365 days one hundred and fifty-five earthquakes of magnitude 3.0 or greater that has struck near. 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. 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: 43 km ENE of Iwaki, Japan.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 141.3539° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.1571° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 43km 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 2017-02-10 21:38:59 Time when the event occurred. UTC/GMT
Updated 2017-02-17 00:55:34 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 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 0.84 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.99 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 108 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mwr The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us20008j2b Id of event.
Event Code 20008j2b An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20008j2b, A comma-separated list of event ids that are associated to an event.

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