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Light earthquake: M4.1 quake has struck near Nuku`alofa in Tonga

Posted by admin on April 22, 2020 0 Comments

Earthquake location -20.1005S, -175.4901WA light earthquake magnitude 4.1 (ml/mb) has occurred on Saturday, 118 km NNW of Nuku`alofa, Tonga (73 miles). The temblor was detected at 21:03:06 / 9:03 pm (local time epicenter). Event id: us70008sgz. Ids that are associated to the earthquake: us70008sgz. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, longitude -175.4901 West, latitude -20.1005 South, depth = 120.17 km. The earthquake was roughly at a depth of 120.17 km (75 miles). Global date and time of event UTC/GMT: 05/04/20 / 2020-04-05 09:03:06 / April 5, 2020 @ 9:03 am.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each 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 one, in the past 30 days two and in the last 365 days twenty-four earthquakes of magnitude 3.0 or greater that has occurred nearby.

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 118 km NNW of Nuku`alofa, Tonga.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -175.4901° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -20.1005° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 120.17 km Depth of the event in kilometers.
Place 118km NNW of Nuku`alofa, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-04-05 09:03:06 Time when the event occurred. UTC/GMT
Updated 2020-04-22 05:12:47 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 259 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 5.342 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.87 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 75 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 us70008sgz Id of event.
Event Code 70008sgz An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us70008sgz, A comma-separated list of event ids that are associated to an event.

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