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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.5 mag, 63 km NNW of Hihifo, Tonga


Earthquake location -15.4174S, -173.9698WA light earthquake with magnitude 4.5 (ml/mb) was reported 63 kilometers (39 miles) from Hihifo in Tonga on Tuesday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. Exact location of event, depth 10 km, -173.9698° West, -15.4174° South. Global time and date of event 10/10/17 / 2017-10-10 18:20:41 / October 10, 2017 @ 6:20 pm UTC/GMT. The temblor was reported at 06:20:41 / 6:20 am (local time epicenter). All ids that are associated to the event: us1000atpc. Unique identifier: us1000atpc.

The epicenter was 63 km (39 miles) from Hihifo (c. 800 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Hihifo. Country/countries that might be effected, Tonga (c. 123 000 pop).

In the past 24 hours, there have been eleven, in the last 10 days twelve, in the past 30 days fourteen and in the last 365 days sixty-six earthquakes of magnitude 3.0 or greater that has occurred nearby. 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.

Did you feel the quake?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 63 km NNW of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.9698° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.4174° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 63km NNW 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 2017-10-10 18:20:41 Time when the event occurred. UTC/GMT
Updated 2017-11-08 21:21:20 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 2.598 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.55 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 79 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 us1000atpc Id of event.
Event Code 1000atpc An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000atpc, A comma-separated list of event ids that are associated to an event.

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