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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.1 mag, 247 km W of Hihifo, Tonga


Earthquake location -16.1236S, -176.0578WA light earthquake magnitude 4.1 (ml/mb) strikes 247 km W of Hihifo, Tonga (153 miles) on Friday. Exact location of earthquake, longitude -176.0578 West, latitude -16.1236 South, depth = 305.18 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us2000db4x. Event ids that are associated: us2000db4x. The earthquake occurred at a depth of 305.18 km (190 miles) below the earth’s surface. The temblor was picked up at 02:31:12 / 2:31 am (local time epicenter). Exact time and date of event in UTC/GMT: 23/02/18 / 2018-02-23 14:31:12 / February 23, 2018 @ 2:31 pm.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. 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 fourteen earthquakes of magnitude 3.0 or greater that have been detected nearby. Each year there are an estimated 13,000 light earthquakes in the world.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 247 km W of Hihifo, Tonga. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -176.0578° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.1236° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 305.18 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 2018-02-23 14:31:12 Time when the event occurred. UTC/GMT
Updated 2018-03-04 12:09:13 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 259 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 4.685 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.47 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 155 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 us2000db4x Id of event.
Event Code 2000db4x An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000db4x, A comma-separated list of event ids that are associated to an event.

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