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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.9 mag, 64 km NNW of Hihifo, Tonga


Earthquake location -15.4094S, -173.9766WA light earthquake with magnitude 4.9 (ml/mb) was detected on Monday, 64 kilometers (40 miles) from Hihifo in Tonga. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 11/03/19 / 2019-03-11 15:27:57 / March 11, 2019 @ 3:27 pm. The earthquake occurred at a depth of 40.97 km (25 miles). The 4.9-magnitude earthquake has occurred at 03:27:57 / 3:27 am (local time epicenter). Exact location of earthquake, -173.9766° West, -15.4094° South, depth 40.97 km. All ids that are associated to the event: us1000jjc7. Unique identifier: us1000jjc7.

Nearest cities/city/villages to epicentrum/hypocenter was Hihifo (min 5000 pop). Epicenter of the event was 64 km (40 miles) from Hihifo (c. 800 pop). Close country/countries, Tonga (c. 123 000 pop) (That might be effected).

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 four and in the last 365 days fifty-eight earthquakes of magnitude 3.0 or greater that have been detected nearby. Every year there are an estimated 13,000 light earthquakes in the world.

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. 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: 64 km NNW of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.9 mb The magnitude for the event.
Longitude -173.9766° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.4094° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 40.97 km Depth of the event in kilometers.
Place 64km NNW 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 2019-03-11 15:27:57 Time when the event occurred. UTC/GMT
Updated 2019-03-21 20:02:44 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 369 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 2.599 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.62 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 88 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 us1000jjc7 Id of event.
Event Code 1000jjc7 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000jjc7, A comma-separated list of event ids that are associated to an event.

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