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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 5 km NNW of Hitachi, Japan

Earthquake location 36.6452S, 140.6171WA light earthquake with magnitude 4 (ml/mb) was reported 5 kilometers (3 miles) from Hitachi in Japan on Sunday. Unique identifier: us1000athq. Ids that are associated to the event: us1000athq. Exact location, longitude 140.6171° East, latitude 36.6452° North, depth = 67.8 km. The earthquake occurred at a depth of 67.8 km (42 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 19:43:09 / 7:43 pm (local time epicenter). Date and time of earthquake in UTC/GMT: 15/10/17 / 2017-10-15 10:43:09 / October 15, 2017 @ 10:43 am.

Country/countries that might be effected, Japan (c. 127 288 000 pop). Epicenter of the event was 66 km (41 miles) from Utsunomiya-shi (c. 449 900 pop), 51 km (32 miles) from Iwaki (c. 357 300 pop), 86 km (54 miles) from Kōriyama (c. 340 600 pop), 37 km (23 miles) from Mito-shi (c. 246 500 pop), 6 km (4 miles) from Hitachi (c. 186 300 pop), 68 km (42 miles) from Tsukuba (c. 175 600 pop). Nearest cities/city/villages to epicentrum/hypocenter was Nikkō, Funehikimachi-funehiki, Miharu (min 5000 pop).

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

How would you describe the shaking?

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: 5 km NNW of Hitachi, Japan.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 140.6171° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.6452° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 67.8 km Depth of the event in kilometers.
Place 5km NNW of Hitachi, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-15 10:43:09 Time when the event occurred. UTC/GMT
Updated 2017-10-17 21:47:03 Time when the event was most recently updated. UTC/GMT
Timezone offset 540 Timezone offset from UTC in minutes at the event epicenter.
Felt 7 The total number of felt reports
CDI 4.3 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 249 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 1.229 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.76 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 167 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 us1000athq Id of event.
Event Code 1000athq An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000athq, A comma-separated list of event ids that are associated to an event.

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