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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.2 quake has struck near Hihifo in Tonga

Posted by admin on August 21, 2018 0 Comments

Earthquake location -15.6495S, -174.8663WA light earthquake with magnitude 4.2 (ml/mb) was detected on Sunday, 124 km WNW of Hihifo, Tonga (77 miles). The 4.2-magnitude earthquake was detected at 14:27:30 / 2:27 pm (local time epicenter). Exact location of earthquake, longitude -174.8663 West, latitude -15.6495 South, depth = 277.54 km. Event ids that are associated to the earthquake: us1000gbgl. Id of event: us1000gbgl. Exact time and date of event in UTC/GMT: 13/08/18 / 2018-08-13 02:27:30 / August 13, 2018 @ 2:27 am. The earthquake occurred at a depth of 277.54 km (172 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

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 thirty earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel anything?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 124 km WNW of Hihifo, Tonga. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -174.8663° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.6495° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 277.54 km Depth of the event in kilometers.
Place 124km WNW 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 2018-08-13 02:27:30 Time when the event occurred. UTC/GMT
Updated 2018-08-21 01:08:34 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 271 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 3.452 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.75 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 66 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 us1000gbgl Id of event.
Event Code 1000gbgl An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000gbgl, A comma-separated list of event ids that are associated to an event.

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