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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.4 mag was detected near Neiafu in Tonga



Earthquake location -18.8239S, -174.6333WA light earthquake with magnitude 4.4 (ml/mb) was reported 71 kilometers (44 miles) from Neiafu in Tonga on Monday. Exact location of earthquake, -174.6333° West, -18.8239° South, depth 113.18 km. The temblor was reported at 00:44:11 / 12:44 am (local time epicenter). The epicenter of the earthquake was roughly 113.18 km (70 miles) below the earth’s surface. Unique identifier: us2000a92x. Ids that are associated to the event: us2000a92x. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 13/08/17 / 2017-08-13 11:44:11 / August 13, 2017 @ 11:44 am.

Earthquake epicenter was 71 km (44 miles) from Neiafu (c. 4 300 pop). Close country/countries that might be effected, Tonga (c. 123 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Neiafu (min 5000 pop).

Every 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 three and in the last 365 days eighteen 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.

Did you feel the quake?

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 71 km WSW of Neiafu, Tonga. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -174.6333° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -18.8239° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 113.18 km Depth of the event in kilometers.
Place 71km WSW 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 2017-08-13 11:44:11 Time when the event occurred. UTC/GMT
Updated 2017-08-25 06:21:15 Time when the event was most recently updated. UTC/GMT
Timezone offset 780 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 4.461 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.58 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 184 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 us2000a92x Id of event.
Event Code 2000a92x An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000a92x, A comma-separated list of event ids that are associated to an event.

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