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Light earthquake: M4.6 quake has struck near Havelu in Tonga

Posted by admin on April 12, 2017 0 Comments

Earthquake location -21.1252S, -175.9598WA light earthquake magnitude 4.6 (ml/mb) strikes 77 kilometers (48 miles) from Havelu in Tonga on Sunday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us10008dlh. Event ids that are associated: us10008dlh. The temblor was picked up at 16:18:54 / 4:18 pm (local time epicenter). Exact time and date of event in UTC/GMT: 27/03/17 / 2017-03-27 04:18:54 / March 27, 2017 @ 4:18 am. Exact location of event, depth 177.95 km, -175.9598° West, -21.1252° South. The epicenter of the earthquake was roughly 177.95 km (111 miles) below the earth’s surface.

Earthquake epicenter was 79 km (49 miles) from Nuku‘alofa (c. 22 400 pop). Nearby country/countries, Tonga (c. 123 000 pop) (That might be effected). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Nuku‘alofa.

Each year there are an estimated 13,000 light earthquakes 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 one, in the last 10 days one, in the past 30 days two and in the last 365 days eighteen earthquakes of magnitude 3.0 or greater that have been detected nearby.

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 77 km W of Havelu, Tonga.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -175.9598° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -21.1252° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 177.95 km Depth of the event in kilometers.
Place 77km 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 2017-03-27 04:18:54 Time when the event occurred. UTC/GMT
Updated 2017-04-12 22:14:59 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 326 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 6.024 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 94 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 us10008dlh Id of event.
Event Code 10008dlh An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10008dlh, A comma-separated list of event ids that are associated to an event.

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