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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag has occurred near Neiafu in Tonga

Posted by admin on March 7, 2016 0 Comments

Earthquake location -18.4779S, -173.7781WA light earthquake magnitude 4.5 (ml/mb) strikes 28 kilometers (17 miles) from Neiafu in Tonga on Friday. Event id: us10004tu5. Ids that are associated to the earthquake: us10004tu5. The temblor was picked up at 11:10:07 / 11:10 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 25/02/16 / 2016-02-25 22:10:07 / February 25, 2016 @ 10:10 pm. The epicenter was at a depth of 35 km (22 miles). Exact location of event, depth 35 km, -173.7781° West, -18.4779° South.

Close country/countries that might be effected, Tonga (c. 123 000 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Neiafu. Earthquake epicenter was 29 km (18 miles) from Neiafu (c. 4 300 pop).

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 three, in the last 10 days three, in the past 30 days four and in the last 365 days twenty-six earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel anything?

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: 28 km NE of Neiafu, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.7781° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -18.4779° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 28km NE 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 2016-02-25 22:10:07 Time when the event occurred. UTC/GMT
Updated 2016-03-07 23:06:54 Time when the event was most recently updated. UTC/GMT
Timezone offset 780 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 3.696 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.44 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 102 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 us10004tu5 Id of event.
Event Code 10004tu5 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10004tu5, A comma-separated list of event ids that are associated to an event.

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