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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag has occurred near Katsuren-haebaru in Japan


Earthquake location 25.9935S, 128.7105WA light earthquake with magnitude 4.2 (ml/mb) was detected on Monday, 91 kilometers (57 miles) from Katsuren-haebaru in Japan. Exact location of earthquake, 128.7105° East, 25.9935° North, depth 10 km. The 4.2-magnitude earthquake was detected at 05:00:40 / 5:00 am (local time epicenter). 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. Exact time and date of earthquake 21/12/20 / 2020-12-21 05:00:40 / December 21, 2020 @ 5:00 am UTC/GMT. Event ids that are associated to the earthquake: us6000d5f1. Id of event: us6000d5f1.

Close country/countries, Japan (c. 127 288 000 pop) (That might be effected). Epicenter of the earthquake was 92 km (57 miles) from Katsuren-haebaru (c. 34 200 pop). Closest city/cities/towns to epicentrum/hypocenter was Katsuren-haebaru (min 5000 pop).

In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days three and in the last 365 days thirteen earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 13,000 light earthquakes in the world. 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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 91 km ESE of Katsuren-haebaru, 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 128.7105° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 25.9935° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 91 km ESE of Katsuren-haebaru, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-12-21 05:00:40 Time when the event occurred. UTC/GMT
Updated 2021-01-09 11:03:09 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 0.926 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.85 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 80 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 us6000d5f1 Id of event.
Event Code 6000d5f1 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000d5f1, A comma-separated list of event ids that are associated to an event.

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