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Moderate earthquake: M5 quake has struck near `Ohonua in Tonga

Posted by admin on February 21, 2018 0 Comments

Earthquake location -20.8016S, -174.0669WA moderate earthquake magnitude 5 (ml/mb) has occurred on Tuesday, 109 km ENE of `Ohonua, Tonga (68 miles). Exact location of earthquake, longitude -174.0669 West, latitude -20.8016 South, depth = 10 km. The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface. The temblor was reported at 05:04:58 / 5:04 am (local time epicenter). Global date and time of event UTC/GMT: 20/02/18 / 2018-02-20 17:04:58 / February 20, 2018 @ 5:04 pm. Event ids that are associated to the earthquake: us2000d5g4. Id of event: us2000d5g4. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days thirty-seven earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 1320 moderate earthquakes in the world each year.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 109 km ENE of `Ohonua, Tonga.

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More information

Parameter Value Description
Magnitude 5 mb The magnitude for the event.
Longitude -174.0669° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -20.8016° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 109km ENE of `Ohonua, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-02-20 17:04:58 Time when the event occurred. UTC/GMT
Updated 2018-02-21 19:17:17 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 385 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 7.194 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.68 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 118 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 us2000d5g4 Id of event.
Event Code 2000d5g4 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000d5g4, A comma-separated list of event ids that are associated to an event.

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