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Light earthquake, 4.5 mag strikes near Hihifo in Tonga

Posted by admin on May 4, 2018 0 Comments

Earthquake location -16.3556S, -173.75WA light earthquake with magnitude 4.5 (ml/mb) was detected on Friday, 44 kilometers (27 miles) from Hihifo in Tonga. The earthquake occurred at a depth of 141.44 km (88 miles). The temblor was reported at 06:48:36 / 6:48 am (local time epicenter). Exact time and date of earthquake 04/05/18 / 2018-05-04 18:48:36 / May 4, 2018 @ 6:48 pm UTC/GMT. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: us1000dy3p. Id of event: us1000dy3p. Exact location of event, depth 141.44 km, -173.75° West, -16.3556° South.

Epicenter of the earthquake was 45 km (28 miles) from Hihifo (c. 800 pop). Nearby country/countries, Tonga (c. 123 000 pop) (That might be effected). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Hihifo.

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 three and in the last 365 days fourty-five earthquakes of magnitude 3.0 or greater that has struck near.

Did you feel the quake?

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: 44 km S of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.75° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.3556° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 141.44 km Depth of the event in kilometers.
Place 44km S of Hihifo, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-05-04 18:48:36 Time when the event occurred. UTC/GMT
Updated 2018-05-04 19:27:28 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 4.538 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.88 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 56 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 us1000dy3p Id of event.
Event Code 1000dy3p An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000dy3p, A comma-separated list of event ids that are associated to an event.

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