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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.3 mag strikes near Hihifo in Tonga

Posted by admin on February 5, 2018 0 Comments

Earthquake location -15.8773S, -174.2023WA light earthquake with magnitude 4.3 (ml/mb) was reported 49 kilometers (30 miles) from Hihifo in Tonga on Sunday. Date and time of earthquake in UTC/GMT: 22/01/18 / 2018-01-22 00:23:45 / January 22, 2018 @ 12:23 am. Exact location of earthquake, -174.2023° West, -15.8773° South, depth 117.2 km. The temblor was reported at 12:23:45 / 12:23 pm (local time epicenter). Event id: us1000cea2. Ids that are associated to the earthquake: us1000cea2. The earthquake occurred at a depth of 117.2 km (73 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearby country/countries that might be effected, Tonga (c. 123 000 pop). Nearest cities/city/villages to epicentrum/hypocenter was Hihifo (min 5000 pop). Epicenter of the event was 44 km (28 miles) from Hihifo (c. 800 pop).

Every year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been two, in the last 10 days four, in the past 30 days seven and in the last 365 days fifty-six earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

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. 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: 49 km W of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude -174.2023° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.8773° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 117.2 km Depth of the event in kilometers.
Place 49km W 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 2018-01-22 00:23:45 Time when the event occurred. UTC/GMT
Updated 2018-02-05 00:25:28 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 284 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 3.053 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.63 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 103 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 us1000cea2 Id of event.
Event Code 1000cea2 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000cea2, A comma-separated list of event ids that are associated to an event.

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