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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.6 mag was detected near South Sandwich Islands region

Posted by admin on August 20, 2025 0 Comments

Earthquake location -55.8637S, -27.2494WA light earthquake with magnitude 4.6 (ml/mb) was reported South Sandwich Islands region (0 miles) on Tuesday. Event ids that are associated to the earthquake: us6000r0pd. Id of event: us6000r0pd. Exact location of event, longitude -27.2494 West, latitude -55.8637 South, depth = 83.718 km. Exact time and date of earthquake 29/07/25 / 2025-07-29 13:49:28 / July 29, 2025 @ 1:49 pm UTC/GMT. The earthquake occurred at a depth of 83.718 km (52 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 13:49:28 / 1:49 pm (local time epicenter).

In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days eight and in the last 365 days ninety-four earthquakes of magnitude 3.0 or greater that was reported nearby. Every year there are an estimated 13,000 light earthquakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: South Sandwich Islands region.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -27.2494° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -55.8637° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 83.718 km Depth of the event in kilometers.
Place South Sandwich Islands region Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-07-29 13:49:28 Time when the event occurred. UTC/GMT
Updated 2025-08-20 21:21:34 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 326 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 44 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 5.539 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.55 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 75 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 us6000r0pd Id of event.
Event Code 6000r0pd An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000r0pd, A comma-separated list of event ids that are associated to an event.

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