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Light earthquake: M4.1 quake has struck near Yonakuni in Japan


Earthquake location 23.9199S, 122.5855WA light earthquake magnitude 4.1 (ml/mb) has occurred on Friday, 73 km SW of Yonakuni, Japan (45 miles). Exact location, longitude 122.5855° East, latitude 23.9199° North, depth = 25.5 km. Event id: us70005frm. Ids that are associated to the earthquake: us70005frm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.1-magnitude earthquake has occurred at 15:05:30 / 3:05 pm (local time epicenter). Global time and date of event 13/09/19 / 2019-09-13 07:05:30 / September 13, 2019 @ 7:05 am UTC/GMT. The epicenter was at a depth of 25.5 km (16 miles).

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

Questions or comments?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 73 km SW of Yonakuni, Japan.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 122.5855° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 23.9199° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 25.5 km Depth of the event in kilometers.
Place 73km SW of Yonakuni, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2019-09-13 07:05:30 Time when the event occurred. UTC/GMT
Updated 2019-09-14 04:53:54 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 259 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 0.669 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.78 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 107 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mwr The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us70005frm Id of event.
Event Code 70005frm An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us70005frm, A comma-separated list of event ids that are associated to an event.

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