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Light earthquake: M4.7 quake has struck near Morioka-shi in Japan


Earthquake location 39.7652S, 141.3475WA light earthquake with magnitude 4.7 (ml/mb) was detected on Saturday, 18 kilometers (11 miles) from Morioka-shi in Japan. The earthquake occurred at a depth of 42.45 km (26 miles) below the earth’s surface. Event id: us100049ha. Ids that are associated to the earthquake: us100049ha. Exact time and date of event in UTC/GMT: 25/12/15 / 2015-12-25 16:42:27 / December 25, 2015 @ 4:42 pm. Exact location of event, longitude 141.3475 East, latitude 39.7652 North, depth = 42.45 km. The temblor was picked up at 01:42:27 / 1:42 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Epicenter of the earthquake was 18 km (11 miles) from Morioka-shi (c. 295 200 pop), 83 km (51 miles) from Hachinohe (c. 239 000 pop), 57 km (35 miles) from Kitakami (c. 93 900 pop), 47 km (29 miles) from Hanamaki (c. 73 100 pop), 88 km (55 miles) from Ōdate (c. 64 500 pop), 96 km (60 miles) from Ichinoseki (c. 63 000 pop), 73 km (45 miles) from Mizusawa (c. 61 300 pop). Nearest cities/city/villages to epicentrum/hypocenter was Yuzawa, Takanosu, Ichinoseki (min 5000 pop). Nearby country/countries that might be effected, Japan (c. 127 288 000 pop).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days three and in the last 365 days thirty-five earthquakes of magnitude 3.0 or greater that has occurred 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.

Did you feel it?

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 18 km ENE of Morioka-shi, Japan. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude 141.3475° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 39.7652° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 42.45 km Depth of the event in kilometers.
Place 18km ENE of Morioka-shi, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-12-25 16:42:27 Time when the event occurred. UTC/GMT
Updated 2015-12-25 17:38:32 Time when the event was most recently updated. UTC/GMT
Timezone offset 540 Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 2.7 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 340 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 1.144 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 105 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 us100049ha Id of event.
Event Code 100049ha An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us100049ha, A comma-separated list of event ids that are associated to an event.

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