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Light earthquake, 4.6 mag strikes near Ishigaki in Japan

Posted by admin on December 20, 2018 0 Comments

Earthquake location 23.7663S, 123.7512WA light earthquake magnitude 4.6 (ml/mb) strikes 76 kilometers (47 miles) from Ishigaki in Japan on Thursday. Exact location, longitude 123.7512° East, latitude 23.7663° North, depth = 30.9 km. The epicenter was at a depth of 30.9 km (19 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.6-magnitude earthquake was detected at 13:16:16 / 1:16 pm (local time epicenter). Exact time and date of event in UTC/GMT: 20/12/18 / 2018-12-20 05:16:16 / December 20, 2018 @ 5:16 am. Unique identifier: us2000iv8y. Ids that are associated to the event: us2000iv8y.

Close country/countries that might be effected, Japan (c. 127 288 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Ishigaki (min 5000 pop). Event epicenter was 76 km (47 miles) from Ishigaki (c. 44 800 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each year there are an estimated 13,000 light quakes in the world. 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 twelve earthquakes of magnitude 3.0 or greater that have been detected nearby.

Did you feel the quake?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 76 km SSW of Ishigaki, Japan.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude 123.7512° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 23.7663° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 30.9 km Depth of the event in kilometers.
Place 76km SSW of Ishigaki, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-12-20 05:16:16 Time when the event occurred. UTC/GMT
Updated 2018-12-20 07:48:32 Time when the event was most recently updated. UTC/GMT
Timezone offset 480 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 326 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 0.971 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.05 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 82 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 us2000iv8y Id of event.
Event Code 2000iv8y An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000iv8y, A comma-separated list of event ids that are associated to an event.

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