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Major earthquake, 7.3 mag strikes near Pangai in Tonga


Earthquake location -20.6S, -173.4WA major earthquake with magnitude 7.3 (ml/mb) was reported 132 kilometers (82 miles) from Pangai in Tonga on Sunday. A tsunami warning has been issued near Pangai in Tonga (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 12:18:47 / 12:18 pm (local time epicenter). Exact location of earthquake, longitude -173.4 West, latitude -20.6 South, depth = 55 km. The earthquake was roughly at a depth of 55 km (34 miles). Global time and date of event 30/03/25 / 2025-03-30 12:18:47 / March 30, 2025 @ 12:18 pm UTC/GMT. Event id: at00stxrjc. Ids that are associated to the earthquake: at00stxrjc, pt25089000.

Nearest cities/city/villages to epicentrum/hypocenter was Pangai (min 5000 pop). Nearby country/countries that might be effected, Tonga (c. 123 000 pop). Earthquake epicenter was 132 km (82 miles) from Pangai (c. 1 700 pop).

Every year there are an estimated 15 major earthquakes in the world. Earthquakes 7.0 to 7.9 may cause serious damage. 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 thirty-six earthquakes of magnitude 3.0 or greater that has struck near.

Did you feel anything?

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: 132 km SE of Pangai, Tonga.

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More information

Parameter Value Description
Magnitude 7.3 mb The magnitude for the event.
Longitude -173.4° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -20.6° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 55 km Depth of the event in kilometers.
Place 132 km SE of Pangai, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-03-30 12:18:47 Time when the event occurred. UTC/GMT
Updated 2025-03-30 12:30:15 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 1 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 820 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network at The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at,pt, A comma-separated list of network contributors.
Number of Stations Used 34 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.39 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 104.399991648 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type Mi The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID at00stxrjc Id of event.
Event Code 00stxrjc An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00stxrjc,pt25089000, A comma-separated list of event ids that are associated to an event.

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