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Moderate World Earthquakes Magnitude 5–5.9

Earthquake: M 5.1 quake strikes near Neiafu in Tonga


Earthquake location -18.0263S, -174.5995WA moderate earthquake magnitude 5.1 (mg/mb) has occurred on Sunday, 94 kilometers (58 miles) from Neiafu in Tonga. The temblor was reported at 08:40:36 / 8:40 am (local time epicenter) at a depth of 320.4 km (199 miles). Global time of event 2015-01-18 08:40:36 UTC/GMT. A tsunami warning has not been issued, according to the U.S. Geological Survey. Exact location of event, longitude -174.5995 West, latitude -18.0263 South, depth 320.4 km.

Close countries, Tonga (c. 123 000 pop). The epicenter was 95 km (59 miles) from Neiafu (c. 4 300 pop). Nearest city, towns to epicentrum/hypocenter was Neiafu.

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Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded in: 94 km NW of Neiafu, Tonga.


More information

Parameter Value Description
Magnitude 5.1 mb The magnitude for the event.
Longitude -174.5995° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -18.0263° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 320.4 km Depth of the event in kilometers.
Place 94km NW 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 2015-01-18 20:40:36 Time when the event occurred. UTC/GMT
Updated 2015-01-18 20:57:51 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 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 400 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 17.616 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.83 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 93 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 usc000th09 Id of event.
Event Code c000th09 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS usc000th09 A comma-separated list of event ids that are associated to an event.

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