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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.5 mag, 68 km WNW of Pangai, Tonga


Earthquake location -19.6422S, -174.9845WA light earthquake magnitude 4.5 (ml/mb) strikes 68 kilometers (42 miles) from Pangai in Tonga on Monday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake was roughly at a depth of 187.21 km (116 miles). Exact time and date of event in UTC/GMT: 18/12/17 / 2017-12-18 06:14:44 / December 18, 2017 @ 6:14 am. Event ids that are associated to the earthquake: us1000bz14. Id of event: us1000bz14. The 4.5-magnitude earthquake has occurred at 19:14:44 / 7:14 pm (local time epicenter). Exact location of event, depth 187.21 km, -174.9845° West, -19.6422° South.

Nearest cities/city/villages to epicentrum/hypocenter was Pangai (min 5000 pop). Nearby country/countries, Tonga (c. 123 000 pop) (That might be effected). Epicenter of the earthquake was 69 km (43 miles) from Pangai (c. 1 700 pop).

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

Questions or comments?

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 68 km WNW of Pangai, Tonga. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -174.9845° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -19.6422° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 187.21 km Depth of the event in kilometers.
Place 68km WNW of Pangai, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-12-18 06:14:44 Time when the event occurred. UTC/GMT
Updated 2018-01-10 06:25:41 Time when the event was most recently updated. UTC/GMT
Timezone offset 780 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 4.807 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.68 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 96 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 us1000bz14 Id of event.
Event Code 1000bz14 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000bz14, A comma-separated list of event ids that are associated to an event.

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