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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4 quake has struck near Hihifo in Tonga



Earthquake location -16.438S, -176.145WA light earthquake with magnitude 4 (ml/mb) was reported 261 km WSW of Hihifo, Tonga (162 miles) on Sunday. The earthquake occurred at a depth of 383.49 km (238 miles) below the earth’s surface. Global time and date of event 10/01/16 / 2016-01-10 14:57:44 / January 10, 2016 @ 2:57 pm UTC/GMT. Event id: us10004ev7. Ids that are associated to the earthquake: us10004ev7. The 4-magnitude earthquake has occurred at 02:57:44 / 2:57 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, -176.145° West, -16.438° South, depth 383.49 km.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each year there are an estimated 13,000 light quakes in the world. 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 fifteen earthquakes of magnitude 3.0 or greater that has struck near.

How would you describe the shaking?

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 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: 261 km WSW of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -176.145° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.438° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 383.49 km Depth of the event in kilometers.
Place 261km WSW 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 2016-01-10 14:57:44 Time when the event occurred. UTC/GMT
Updated 2016-02-03 17:28:01 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 246 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 4.909 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.74 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 120 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 us10004ev7 Id of event.
Event Code 10004ev7 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10004ev7, A comma-separated list of event ids that are associated to an event.

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