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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.5 quake has struck near Havelu in Tonga


Earthquake location -21.1407S, -175.9897WA light earthquake magnitude 4.5 (ml/mb) strikes 80 kilometers (50 miles) from Havelu in Tonga on Tuesday. All ids that are associated to the event: us10006aes. Unique identifier: us10006aes. 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 151.22 km (94 miles) below the earth’s surface. Exact location of earthquake, -175.9897° West, -21.1407° South, depth 151.22 km. Global time and date of event 02/08/16 / 2016-08-02 14:14:13 / August 2, 2016 @ 2:14 pm UTC/GMT. The 4.5-magnitude earthquake has occurred at 02:14:13 / 2:14 am (local time epicenter).

Nearest cities/city/villages to epicentrum/hypocenter was Nuku‘alofa (min 5000 pop). Country/countries that might be effected, Tonga (c. 123 000 pop). Event epicenter was 82 km (51 miles) from Nuku‘alofa (c. 22 400 pop).

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 four, in the last 10 days four, in the past 30 days five and in the last 365 days twenty-one earthquakes of magnitude 3.0 or greater that has struck near.

Did you feel anything?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city 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: 80 km W of Havelu, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -175.9897° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -21.1407° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 151.22 km Depth of the event in kilometers.
Place 80km W of Havelu, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-08-02 14:14:13 Time when the event occurred. UTC/GMT
Updated 2016-08-28 15:40:29 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 6.055 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.09 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 109 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 us10006aes Id of event.
Event Code 10006aes An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10006aes, A comma-separated list of event ids that are associated to an event.

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