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Light earthquake: M4.6 quake strikes near Annaka in Japan


Earthquake location 36.4112S, 138.8193WA light earthquake magnitude 4.6 (mg/mb) has striked on Sunday, 12 kilometers (7 miles) from Annaka in Japan. The temblor was reported at 15:25:15 / 3:25 pm (local time epicenter) at a depth of 147.27 km (92 miles). Global time of event 12/04/15 / 2015-04-12 06:25:15 / April 12, 2015 @ 6:25 am UTC/GMT. A tsunami warning has not been issued, according to the U.S. Geological Survey. Exact location of event, longitude 138.8193 East, latitude 36.4112 North, depth 147.27 km, unique identifier, us200025wj.

Close countries, Japan (c. 127 288 000 pop). The epicenter was 94 km (58 miles) from Saitama (c. 1 193 400 pop), 94 km (58 miles) from Yono (c. 1 077 700 pop), 95 km (59 miles) from Hachiōji (c. 579 400 pop), 97 km (60 miles) from Utsunomiya-shi (c. 449 900 pop), 63 km (39 miles) from Nagano-shi (c. 360 200 pop). Nearest city, towns to epicentrum/hypocenter was Asaka, Hino, Jōetsu.

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Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded in: 12 km NW of Annaka, Japan.


More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude 138.8193° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.4112° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 147.27 km Depth of the event in kilometers.
Place 12km NW of Annaka, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-04-12 06:25:15 Time when the event occurred. UTC/GMT
Updated 2015-04-12 07:11:03 Time when the event was most recently updated. UTC/GMT
Timezone offset 540 Timezone offset from UTC in minutes at the event epicenter.
Felt 6 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 327 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 0.513 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.79 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 53 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 us200025wj Id of event.
Event Code 200025wj An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us200025wj, A comma-separated list of event ids that are associated to an event.

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