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Moderate earthquake: M5.1 quake has struck near Hihifo in Tonga

Posted by admin on August 23, 2025 0 Comments

Earthquake location -17.1173S, -172.1243WA moderate earthquake magnitude 5.1 (ml/mb) has struck on Saturday, 220 km SE of Hihifo, Tonga (137 miles). Exact location of earthquake, -172.1243° West, -17.1173° South, depth 10 km. The 5.1-magnitude earthquake was detected at 15:49:53 / 3:49 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: us6000r3ck. Id of event: us6000r3ck. Date and time of earthquake in UTC/GMT: 23/08/25 / 2025-08-23 15:49:53 / August 23, 2025 @ 3:49 pm. The earthquake occurred at a depth of 10 km (6 miles).

There are an estimated 1320 moderate 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 one and in the last 365 days thirteen earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures.

Did you feel the quake?

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 220 km SE of Hihifo, Tonga. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 5.1 mb The magnitude for the event.
Longitude -172.1243° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -17.1173° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 220 km SE 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 2025-08-23 15:49:53 Time when the event occurred. UTC/GMT
Updated 2025-08-23 16:15:14 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 400 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 85 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 2.857 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.34 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 53 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 us6000r3ck Id of event.
Event Code 6000r3ck An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000r3ck, A comma-separated list of event ids that are associated to an event.

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