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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.2 mag, 181 km SW of Vaini, Tonga



Earthquake location -22.137S, -176.6409WA light earthquake magnitude 4.2 (ml/mb) has occurred on Tuesday, 181 km SW of Vaini, Tonga (112 miles). The earthquake was roughly at a depth of 169.82 km (106 miles). Exact location of event, depth 169.82 km, -176.6409° West, -22.137° South. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). All ids that are associated to the event: us2000aakd. Unique identifier: us2000aakd. Exact time and date of event in UTC/GMT: 16/08/17 / 2017-08-16 02:14:15 / August 16, 2017 @ 2:14 am. The temblor was detected at 14:14:15 / 2:14 pm (local time epicenter).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each year there are an estimated 13,000 light quakes in the world. 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 twenty-one earthquakes of magnitude 3.0 or greater that has occurred nearby.

Questions or comments?

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: 181 km SW of Vaini, Tonga. This information 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 -176.6409° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -22.137° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 169.82 km Depth of the event in kilometers.
Place 181km SW of Vaini, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-08-16 02:14:15 Time when the event occurred. UTC/GMT
Updated 2017-08-23 01:08:17 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 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 6.632 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.9 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 115 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 us2000aakd Id of event.
Event Code 2000aakd An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000aakd, A comma-separated list of event ids that are associated to an event.

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