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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 247 km W of Hihifo, Tonga


Earthquake location -16.1442S, -176.0508WA light earthquake with magnitude 4 (ml/mb) was reported 247 km W of Hihifo, Tonga (153 miles) on Sunday. Exact location of event, longitude -176.0508 West, latitude -16.1442 South, depth = 368.85 km. 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: us2000ar0t. Unique identifier: us2000ar0t. The earthquake occurred at a depth of 368.85 km (229 miles) below the earth’s surface. The 4-magnitude earthquake has occurred at 23:25:20 / 11:25 pm (local time epicenter). Exact time and date of earthquake 11/09/17 / 2017-09-11 11:25:20 / September 11, 2017 @ 11:25 am UTC/GMT.

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 seventeen earthquakes of magnitude 3.0 or greater that have been detected in the same area. 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.

Did you feel anything?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 247 km W of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -176.0508° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.1442° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 368.85 km Depth of the event in kilometers.
Place 247km W 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 2017-09-11 11:25:20 Time when the event occurred. UTC/GMT
Updated 2017-09-23 10:42:54 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 246 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 4.688 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.94 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 110 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 us2000ar0t Id of event.
Event Code 2000ar0t An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000ar0t, A comma-separated list of event ids that are associated to an event.

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