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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.4 mag has occurred near Pangai in Tonga


Earthquake location -20.384S, -173.7716WA light earthquake magnitude 4.4 (ml/mb) has struck on Sunday, 88 kilometers (55 miles) from Pangai in Tonga. Global time and date of event 22/04/18 / 2018-04-22 15:16:04 / April 22, 2018 @ 3:16 pm UTC/GMT. The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). All ids that are associated to the event: us1000dsq9. Unique identifier: us1000dsq9. The temblor was reported at 03:16:04 / 3:16 am (local time epicenter). Exact location of earthquake, longitude -173.7716 West, latitude -20.384 South, depth = 10 km.

Close country/countries, Tonga (c. 123 000 pop) (That might be effected). Nearest cities/city/towns to hypocenter/epicentrum was Pangai (min 5000 pop). The epicenter was 88 km (55 miles) from Pangai (c. 1 700 pop).

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 two, in the last 10 days two, in the past 30 days three and in the last 365 days fourty-five earthquakes of magnitude 3.0 or greater that has struck near.

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 88 km SE of Pangai, Tonga.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -173.7716° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -20.384° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 88km SE 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 2018-04-22 15:16:04 Time when the event occurred. UTC/GMT
Updated 2018-04-29 14:08:26 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 298 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 3.847 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.17 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 90 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 us1000dsq9 Id of event.
Event Code 1000dsq9 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000dsq9, A comma-separated list of event ids that are associated to an event.

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