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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.6 mag was detected near Hihifo in Tonga


Earthquake location -16.6284S, -173.495WA light earthquake magnitude 4.6 (ml/mb) has struck on Saturday, 79 kilometers (49 miles) from Hihifo in Tonga. The temblor was reported at 07:22:28 / 7:22 am (local time epicenter). 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 38.75 km (24 miles). Date and time of earthquake in UTC/GMT: 29/08/15 / 2015-08-29 19:22:28 / August 29, 2015 @ 7:22 pm. Exact location of earthquake, -173.495° West, -16.6284° South, depth 38.75 km. All ids that are associated to the event: us20003htv. Unique identifier: us20003htv.

Close country/countries, Tonga (c. 123 000 pop) (That might be effected). Closest city/cities/towns to epicentrum/hypocenter was Hihifo (min 5000 pop). Epicenter of the event was 82 km (51 miles) from Hihifo (c. 800 pop).

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

Did you feel the quake?

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. 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: 79 km SSE of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -173.495° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.6284° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 38.75 km Depth of the event in kilometers.
Place 79km SSE 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 2015-08-29 19:22:28 Time when the event occurred. UTC/GMT
Updated 2015-09-26 01:07:32 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 326 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 4.179 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.7 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 105 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 us20003htv Id of event.
Event Code 20003htv An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20003htv, A comma-separated list of event ids that are associated to an event.

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