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Light earthquake, 4.7 mag was detected near Hihifo in Tonga

Posted by admin on April 20, 2020 0 Comments

Earthquake location -15.4612S, -173.6512WA light earthquake magnitude 4.7 (ml/mb) has struck on Monday, 55 kilometers (34 miles) from Hihifo in Tonga. The earthquake was roughly at a depth of 35 km (22 miles). Exact location of event, longitude -173.6512 West, latitude -15.4612 South, depth = 35 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 20/04/20 / 2020-04-20 18:37:11 / April 20, 2020 @ 6:37 pm. The 4.7-magnitude earthquake has occurred at 06:37:11 / 6:37 am (local time epicenter). Unique identifier: us700090lg. Ids that are associated to the event: us700090lg.

Nearest cities/city/villages to epicentrum/hypocenter was Hihifo (min 5000 pop). Event epicenter was 57 km (35 miles) from Hihifo (c. 800 pop). Close country/countries that might be effected, Tonga (c. 123 000 pop).

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 two, in the past 30 days six and in the last 365 days sixty-seven earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

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. 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: 55 km N of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -173.6512° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.4612° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 55km N 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 2020-04-20 18:37:11 Time when the event occurred. UTC/GMT
Updated 2020-04-20 19:51:09 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 340 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 14.361 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.62 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 69 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 us700090lg Id of event.
Event Code 700090lg An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us700090lg, A comma-separated list of event ids that are associated to an event.

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