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Light World Earthquakes Magnitude 4-4.9

Earthquake: M 4.7 quake strikes near Hihifo in Tonga


Earthquake location -15.0763S, -174.7291WA light earthquake magnitude 4.7 (mg/mb) has occurred on Friday, 142 kilometers (88 miles) from Hihifo in Tonga. The temblor was reported at 09:41:03 / 9:41 am (local time epicenter) at a depth of 543.94 km (338 miles). Global time of event 20/02/15 / 2015-02-20 21:41:03 / February 20, 2015 @ 9:41 pm UTC/GMT. A tsunami warning has not been issued, according to the U.S. Geological Survey. Exact location of event, longitude -174.7291 West, latitude -15.0763 South, depth 543.94 km, unique identifier, usc000ts06

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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: 142 km NW of Hihifo, Tonga.


More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -174.7291° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.0763° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 543.94 km Depth of the event in kilometers.
Place 142km NW 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 2015-02-20 21:41:03 Time when the event occurred. UTC/GMT
Updated 2015-02-20 22:09:15 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 340 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 6.074 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.07 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 123 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 usc000ts06 Id of event.
Event Code c000ts06 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,usc000ts06, A comma-separated list of event ids that are associated to an event.

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