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Light earthquake: M4.2 quake has struck near Katsuura in Japan


Earthquake location 34.4557S, 141.8586WA light earthquake magnitude 4.2 (ml/mb) has struck on Friday, 161 km ESE of Katsuura, Japan (100 miles). Exact location of event, depth 10 km, 141.8586° East, 34.4557° North. The temblor was detected at 15:21:39 / 3:21 pm (local time epicenter). Event ids that are associated to the earthquake: us10006up8. Id of event: us10006up8. Global time and date of event 23/09/16 / 2016-09-23 06:21:39 / September 23, 2016 @ 6:21 am UTC/GMT. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface.

Each year there are an estimated 13,000 light quakes in the world. In the past 24 hours, there have been thirty-five, in the last 10 days thirty-seven, in the past 30 days fourty-eight and in the last 365 days fifty-five earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel the quake?

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: 161 km ESE of Katsuura, Japan. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 141.8586° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 34.4557° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 161km ESE of Katsuura, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-09-23 06:21:39 Time when the event occurred. UTC/GMT
Updated 2016-10-19 08:40:34 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 271 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 2.165 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.96 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 155 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 us10006up8 Id of event.
Event Code 10006up8 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10006up8, A comma-separated list of event ids that are associated to an event.

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