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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 162 km WSW of Hihifo, Tonga


Earthquake location -16.5061S, -175.1576WA light earthquake magnitude 4 (ml/mb) has struck on Monday, 162 km WSW of Hihifo, Tonga (101 miles). Exact location of earthquake, longitude -175.1576 West, latitude -16.5061 South, depth = 261.36 km. The earthquake occurred at a depth of 261.36 km (162 miles) below the earth’s surface. All ids that are associated to the event: us10003q7a. Unique identifier: us10003q7a. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 12:34:52 / 12:34 pm (local time epicenter). Exact time and date of earthquake 13/10/15 / 2015-10-13 00:34:52 / October 13, 2015 @ 12:34 am UTC/GMT.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light earthquakes in the world each year. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days three and in the last 365 days seventeen earthquakes of magnitude 3.0 or greater that has occurred nearby.

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 162 km WSW of Hihifo, Tonga. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -175.1576° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.5061° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 261.36 km Depth of the event in kilometers.
Place 162km WSW 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 2015-10-13 00:34:52 Time when the event occurred. UTC/GMT
Updated 2015-11-02 04:51:35 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 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 5.6 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.35 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 191 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 us10003q7a Id of event.
Event Code 10003q7a An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10003q7a, A comma-separated list of event ids that are associated to an event.

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