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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag was detected near Houma in Tonga

Posted by admin on September 9, 2025 0 Comments

Earthquake location -20.5067S, -177.5749WA light earthquake with magnitude 4.2 (ml/mb) was detected on Thursday, 247 km WNW of Houma, Tonga (153 miles). Unique identifier: us7000qust. Ids that are associated to the event: us7000qust. Date and time of earthquake in UTC/GMT: 14/08/25 / 2025-08-14 02:13:46 / August 14, 2025 @ 2:13 am. The earthquake occurred at a depth of 528.326 km (328 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude -177.5749 West, latitude -20.5067 South, depth = 528.326 km. The 4.2-magnitude earthquake was detected at 02:13:46 / 2:13 am (local time epicenter).

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

Questions or comments?

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 247 km WNW of Houma, Tonga. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -177.5749° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -20.5067° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 528.326 km Depth of the event in kilometers.
Place 247 km WNW of Houma, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-08-14 02:13:46 Time when the event occurred. UTC/GMT
Updated 2025-09-09 22:48:47 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 271 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 31 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 4.963 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 101 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 us7000qust Id of event.
Event Code 7000qust An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000qust, A comma-separated list of event ids that are associated to an event.

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