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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.1 mag, 226 km NW of Nuku`alofa, Tonga

Posted by admin on July 2, 2017 0 Comments

Earthquake location -19.6437S, -176.6833WA light earthquake with magnitude 4.1 (ml/mb) was reported 226 km NW of Nuku`alofa, Tonga (140 miles) on Tuesday. The earthquake was roughly at a depth of 388.36 km (241 miles). The temblor was reported at 10:20:12 / 10:20 am (local time epicenter). Exact location, longitude -176.6833° West, latitude -19.6437° South, depth = 388.36 km. Unique identifier: us20009pbv. Ids that are associated to the event: us20009pbv. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of earthquake 20/06/17 / 2017-06-20 22:20:12 / June 20, 2017 @ 10:20 pm UTC/GMT.

Each year there are an estimated 13,000 light quakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days five and in the last 365 days sixty-two earthquakes of magnitude 3.0 or greater that have been detected in the same area.

How would you describe the shaking?

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: 226 km NW of Nuku`alofa, Tonga.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -176.6833° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -19.6437° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 388.36 km Depth of the event in kilometers.
Place 226km NW 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 2017-06-20 22:20:12 Time when the event occurred. UTC/GMT
Updated 2017-07-02 05:15:50 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 5.334 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.35 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 266 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 us20009pbv Id of event.
Event Code 20009pbv An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20009pbv, A comma-separated list of event ids that are associated to an event.

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