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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag was detected near Hihifo in Tonga


Earthquake location -15.3122S, -173.8663WA light earthquake magnitude 4.5 (ml/mb) strikes 71 kilometers (44 miles) from Hihifo in Tonga on Monday. The earthquake occurred at a depth of 35 km (22 miles). The 4.5-magnitude earthquake has occurred at 01:20:56 / 1:20 am (local time epicenter). Exact time and date of earthquake 17/06/19 / 2019-06-17 13:20:56 / June 17, 2019 @ 1:20 pm UTC/GMT. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, longitude -173.8663 West, latitude -15.3122 South, depth = 35 km. Id of earthquake: us600045r7. Event ids that are associated: us600045r7.

Country/countries that might be effected, Tonga (c. 123 000 pop). Earthquake epicenter was 72 km (45 miles) from Hihifo (c. 800 pop). 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. There are an estimated 13,000 light earthquakes in the world each year. In the past 24 hours, there have been one, in the last 10 days six, in the past 30 days eight and in the last 365 days fifty-six earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel it?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 71 km N of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.8663° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.3122° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 71km 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 2019-06-17 13:20:56 Time when the event occurred. UTC/GMT
Updated 2019-06-25 16:33:20 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 2.456 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.14 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 116 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 us600045r7 Id of event.
Event Code 600045r7 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us600045r7, A comma-separated list of event ids that are associated to an event.

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