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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag was detected near Chichi-shima in Japan

Posted by admin on October 22, 2017 0 Comments

Earthquake location 28.1545S, 139.9329WA light earthquake with magnitude 4.2 (ml/mb) was detected on Sunday, 254 km WNW of Chichi-shima, Japan (158 miles). The earthquake occurred at a depth of 535.5 km (333 miles) below the earth’s surface. The temblor was reported at 23:29:47 / 11:29 pm (local time epicenter). Global date and time of event UTC/GMT: 08/10/17 / 2017-10-08 14:29:47 / October 8, 2017 @ 2:29 pm. Id of earthquake: us1000arn9. Event ids that are associated: us1000arn9. Exact location of earthquake, 139.9329° East, 28.1545° North, depth 535.5 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

There are an estimated 13,000 light quakes 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 four and in the last 365 days twenty-three earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

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. 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: 254 km WNW of Chichi-shima, Japan.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 139.9329° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 28.1545° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 535.5 km Depth of the event in kilometers.
Place 254km WNW of Chichi-shima, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-08 14:29:47 Time when the event occurred. UTC/GMT
Updated 2017-10-22 18:13:22 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 2.259 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.58 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 73 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 us1000arn9 Id of event.
Event Code 1000arn9 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000arn9, A comma-separated list of event ids that are associated to an event.

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