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Light earthquake, 4.4 mag was detected near Neiafu in Tonga

Posted by admin on December 30, 2018 0 Comments

Earthquake location -18.1528S, -176.6969WA light earthquake with magnitude 4.4 (ml/mb) was reported 291 km W of Neiafu, Tonga (181 miles) on Saturday. The earthquake was roughly at a depth of 338.26 km (210 miles). Exact time and date of event in UTC/GMT: 30/12/18 / 2018-12-30 04:04:05 / December 30, 2018 @ 4:04 am. The 4.4-magnitude earthquake was detected at 16:04:05 / 4:04 pm (local time epicenter). Id of earthquake: us2000iz30. Event ids that are associated: us2000iz30. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, -176.6969° West, -18.1528° South, depth 338.26 km.

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 twenty-eight earthquakes of magnitude 3.0 or greater that has occurred nearby.

How would you describe the shaking?

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: 291 km W of Neiafu, Tonga.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -176.6969° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -18.1528° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 338.26 km Depth of the event in kilometers.
Place 291km W of Neiafu, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-12-30 04:04:05 Time when the event occurred. UTC/GMT
Updated 2018-12-30 05:08:12 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 298 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 4.06 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.29 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 73 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 us2000iz30 Id of event.
Event Code 2000iz30 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000iz30, A comma-separated list of event ids that are associated to an event.

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