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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 March 7, 2018 0 Comments

Earthquake location -16.2428S, -173.1028WA light earthquake magnitude 4.5 (ml/mb) has occurred on Saturday, 76 kilometers (47 miles) from Hihifo in Tonga. The earthquake was roughly at a depth of 35 km (22 miles). Global date and time of event UTC/GMT: 18/02/18 / 2018-02-18 00:44:18 / February 18, 2018 @ 12:44 am. Id of earthquake: us2000d8rr. Event ids that are associated: us2000d8rr. Exact location of event, depth 35 km, -173.1028° West, -16.2428° South. The 4.5-magnitude earthquake was detected at 12:44:18 / 12:44 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearest cities/city/towns to hypocenter/epicentrum was Hihifo (min 5000 pop). The epicenter was 81 km (50 miles) from Hihifo (c. 800 pop). Nearby country/countries that might be effected, Tonga (c. 123 000 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been three, in the last 10 days four, in the past 30 days six and in the last 365 days fifty-four earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light earthquakes in the world each year.

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. 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: 76 km ESE of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.1028° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.2428° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 76km ESE 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 2018-02-18 00:44:18 Time when the event occurred. UTC/GMT
Updated 2018-03-07 04:04:27 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 2.649 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.33 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 110 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 us2000d8rr Id of event.
Event Code 2000d8rr An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000d8rr, A comma-separated list of event ids that are associated to an event.

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