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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag strikes near Neiafu in Tonga



Earthquake location -18.2715S, -174.6358WA light earthquake magnitude 4.5 (ml/mb) has struck on Sunday, 80 kilometers (50 miles) from Neiafu in Tonga. The temblor was detected at 11:31:52 / 11:31 am (local time epicenter). Unique identifier: us100088pc. Ids that are associated to the event: us100088pc. The earthquake occurred at a depth of 70.98 km (44 miles) below the earth’s surface. Date and time of earthquake in UTC/GMT: 05/03/17 / 2017-03-05 23:31:52 / March 5, 2017 @ 11:31 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude -174.6358 West, latitude -18.2715 South, depth = 70.98 km.

The epicenter was 81 km (50 miles) from Neiafu (c. 4 300 pop). Closest city/cities/towns to epicentrum/hypocenter was Neiafu (min 5000 pop). Nearby country/countries that might be effected, Tonga (c. 123 000 pop).

There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. 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 twenty-five earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel anything?

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 80 km WNW of Neiafu, Tonga. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -174.6358° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -18.2715° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 70.98 km Depth of the event in kilometers.
Place 80km WNW of Neiafu, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-03-05 23:31:52 Time when the event occurred. UTC/GMT
Updated 2017-03-13 21:53:15 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 4.534 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.95 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 191 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 us100088pc Id of event.
Event Code 100088pc An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us100088pc, A comma-separated list of event ids that are associated to an event.

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