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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag strikes near Hihifo in Tonga

Posted by admin on April 26, 2018 0 Comments

Earthquake location -15.3898S, -173.7168WA light earthquake with magnitude 4.5 (ml/mb) was reported 62 kilometers (39 miles) from Hihifo in Tonga on Sunday. The 4.5-magnitude earthquake was detected at 01:32:40 / 1:32 am (local time epicenter). Exact location of earthquake, -173.7168° West, -15.3898° South, depth 54.96 km. The earthquake occurred at a depth of 54.96 km (34 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of event in UTC/GMT: 22/04/18 / 2018-04-22 13:32:40 / April 22, 2018 @ 1:32 pm. Event id: us1000dsqr. Ids that are associated to the earthquake: us1000dsqr.

Earthquake epicenter was 63 km (39 miles) from Hihifo (c. 800 pop). Nearby country/countries, Tonga (c. 123 000 pop) (That might be effected). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Hihifo.

In the past 24 hours, there have been two, in the last 10 days three, in the past 30 days five and in the last 365 days eighty-three earthquakes of magnitude 3.0 or greater that have been detected in the same area. 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.

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 62 km N of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.7168° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.3898° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 54.96 km Depth of the event in kilometers.
Place 62km N 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 2018-04-22 13:32:40 Time when the event occurred. UTC/GMT
Updated 2018-04-26 20:20:55 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 2.385 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.5 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 109 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 us1000dsqr Id of event.
Event Code 1000dsqr An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000dsqr, A comma-separated list of event ids that are associated to an event.

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