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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag strikes near Hihifo in Tonga

Earthquake location -15.9973S, -176.1125WA light earthquake with magnitude 4.2 (ml/mb) was detected on Sunday, 252 km W of Hihifo, Tonga (157 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of earthquake 05/10/15 / 2015-10-05 11:55:16 / October 5, 2015 @ 11:55 am UTC/GMT. Id of earthquake: us10003nl3. Event ids that are associated: us10003nl3. Exact location of event, longitude -176.1125 West, latitude -15.9973 South, depth = 377.88 km. The earthquake was roughly at a depth of 377.88 km (235 miles). The temblor was reported at 23:55:16 / 11:55 pm (local time epicenter).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days two and in the last 365 days ten earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 13,000 light earthquakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel anything?

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: 252 km W of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -176.1125° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.9973° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 377.88 km Depth of the event in kilometers.
Place 252km 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 2015-10-05 11:55:16 Time when the event occurred. UTC/GMT
Updated 2015-10-20 07:00:40 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 271 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 4.676 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.05 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 102 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 us10003nl3 Id of event.
Event Code 10003nl3 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10003nl3, A comma-separated list of event ids that are associated to an event.

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