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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.8 mag, 84 km ENE of ‘Ohonua, Tonga


Earthquake location -21.1753S, -174.1546WA light earthquake magnitude 4.8 (ml/mb) has occurred on Thursday, 84 kilometers (52 miles) from ‘Ohonua in Tonga. Unique identifier: us7000dex0. Ids that are associated to the event: us7000dex0. Exact location of event, longitude -174.1546 West, latitude -21.1753 South, depth = 10 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake was roughly at a depth of 10 km (6 miles). Date and time of earthquake in UTC/GMT: 25/02/21 / 2021-02-25 22:52:14 / February 25, 2021 @ 10:52 pm. The temblor was picked up at 22:52:14 / 10:52 pm (local time epicenter).

Event epicenter was 84 km (52 miles) from ‘Ohonua (c. 1 200 pop). Country/countries that might be effected, Tonga (c. 123 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was ‘Ohonua.

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

Did you feel the quake?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 84 km ENE of ‘Ohonua, Tonga.

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More information

Parameter Value Description
Magnitude 4.8 mb The magnitude for the event.
Longitude -174.1546° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -21.1753° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 84 km ENE of ‘Ohonua, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2021-02-25 22:52:14 Time when the event occurred. UTC/GMT
Updated 2021-03-06 05:20:48 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 354 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 4.487 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.57 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 117 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 us7000dex0 Id of event.
Event Code 7000dex0 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000dex0, A comma-separated list of event ids that are associated to an event.

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