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Light earthquake: M4.5 quake has struck near Hachijo-jima in Japan

Posted by admin on December 15, 2017 0 Comments

Earthquake location 31.7381S, 141.7003WA light earthquake magnitude 4.5 (ml/mb) has occurred on Thursday, 232 km SE of Hachijo-jima, Japan (144 miles). The earthquake occurred at a depth of 16.53 km (10 miles) below the earth’s surface. Event ids that are associated to the earthquake: us1000bjsv. Id of event: us1000bjsv. Date and time of earthquake in UTC/GMT: 23/11/17 / 2017-11-23 00:35:19 / November 23, 2017 @ 12:35 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 141.7003 East, latitude 31.7381 North, depth = 16.53 km. The temblor was picked up at 09:35:19 / 9:35 am (local time epicenter).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been two, in the last 10 days five, in the past 30 days thirteen and in the last 365 days thirty-six earthquakes of magnitude 3.0 or greater that has occurred nearby.

How would you describe the shaking?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 232 km SE of Hachijo-jima, Japan.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 141.7003° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 31.7381° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 16.53 km Depth of the event in kilometers.
Place 232km SE of Hachijo-jima, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-11-23 00:35:19 Time when the event occurred. UTC/GMT
Updated 2017-12-15 00:34:26 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 312 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 2.105 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.31 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 146 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 us1000bjsv Id of event.
Event Code 1000bjsv An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000bjsv, A comma-separated list of event ids that are associated to an event.

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