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Light earthquake: M4.5 quake has struck near Neiafu in Tonga

Posted by admin on November 29, 2017 0 Comments

Earthquake location -18.2917S, -173.7922WA light earthquake magnitude 4.5 (ml/mb) strikes 44 kilometers (27 miles) from Neiafu in Tonga on Wednesday. Exact location of earthquake, longitude -173.7922 West, latitude -18.2917 South, depth = 47.39 km. The epicenter of the earthquake was roughly 47.39 km (29 miles) below the earth’s surface. The temblor was detected at 07:43:17 / 7:43 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us2000bljb. Event ids that are associated: us2000bljb. Global date and time of event UTC/GMT: 01/11/17 / 2017-11-01 19:43:17 / November 1, 2017 @ 7:43 pm.

Event epicenter was 45 km (28 miles) from Neiafu (c. 4 300 pop). Nearby country/countries that might be effected, Tonga (c. 123 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Neiafu (min 5000 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Every year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days two and in the last 365 days twenty-four earthquakes of magnitude 3.0 or greater that was reported nearby.

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. 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: 44 km NNE of Neiafu, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.7922° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -18.2917° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 47.39 km Depth of the event in kilometers.
Place 44km NNE of Neiafu, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-11-01 19:43:17 Time when the event occurred. UTC/GMT
Updated 2017-11-29 00:25:55 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 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 3.745 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.03 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 115 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 us2000bljb Id of event.
Event Code 2000bljb An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000bljb, A comma-separated list of event ids that are associated to an event.

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