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Light earthquake: M4.1 quake has struck near Shimo-furano in Japan

Earthquake location 43.2631S, 142.372WA light earthquake magnitude 4.1 (ml/mb) strikes 9 kilometers (6 miles) from Shimo-furano in Japan on Saturday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global time and date of event 20/04/18 / 2018-04-20 19:10:54 / April 20, 2018 @ 7:10 pm UTC/GMT. The earthquake occurred at a depth of 168.69 km (105 miles) below the earth’s surface. The 4.1-magnitude earthquake was detected at 04:10:54 / 4:10 am (local time epicenter). Event id: us1000dphu. Ids that are associated to the earthquake: us1000dphu. Exact location of event, depth 168.69 km, 142.372° East, 43.2631° North.

Epicenter of the earthquake was 86 km (53 miles) from Sapporo (c. 1 883 000 pop), 56 km (35 miles) from Asahikawa (c. 356 600 pop), 78 km (48 miles) from Obihiro (c. 173 900 pop), 69 km (43 miles) from Ebetsu (c. 134 000 pop), 77 km (48 miles) from Chitose (c. 92 900 pop), 50 km (31 miles) from Iwamizawa (c. 85 100 pop). Country/countries that might be effected, Japan (c. 127 288 000 pop). Nearest cities/city/towns to hypocenter/epicentrum was Sapporo, Ishikari, Obihiro (min 5000 pop).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days seven earthquakes of magnitude 3.0 or greater that was reported nearby. There are an estimated 13,000 light quakes in the world each year. 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. 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: 9 km S of Shimo-furano, Japan.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 142.372° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 43.2631° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 168.69 km Depth of the event in kilometers.
Place 9km S of Shimo-furano, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-04-20 19:10:54 Time when the event occurred. UTC/GMT
Updated 2018-04-20 20:21:51 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 0.87 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.18 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 113 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 us1000dphu Id of event.
Event Code 1000dphu An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000dphu, A comma-separated list of event ids that are associated to an event.

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