Moderate earthquake, 5.1 mag was detected near South Sandwich Islands region

A moderate earthquake magnitude 5.1 (ml/mb) strikes South Sandwich Islands region (0 miles) on Saturday. Id of earthquake: us6000rnb7. Event ids that are associated: us6000rnb7. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 17:35:44 / 5:35 pm (local time epicenter). Exact location of event, depth 79.904 km, -27.1808° West, -55.7298° South. Exact time and date of earthquake 25/10/25 / 2025-10-25 17:35:44 / October 25, 2025 @ 5:35 pm UTC/GMT. The epicenter was at a depth of 79.904 km (50 miles).

Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures. In the past 24 hours, there have been seven, in the last 10 days ten, in the past 30 days fifteen and in the last 365 days ninety-four earthquakes of magnitude 3.0 or greater that have been detected nearby. Every year there are an estimated 1320 moderate earthquakes in the world.

Did you feel it?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city 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: South Sandwich Islands region.

South Sandwich Islands region

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Parameter	Value	Description
Magnitude	5.1 mb	The magnitude for the event.
Longitude	-27.1808° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-55.7298° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	79.904 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	2025-10-25 17:35:44	Time when the event occurred. UTC/GMT
Updated	2025-11-18 23:07:03	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	33	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	5.549	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.7 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	57	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	us6000rnb7	Id of event.
Event Code	6000rnb7	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000rnb7,	A comma-separated list of event ids that are associated to an event.

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Moderate earthquake, 5.1 mag was detected near South Sandwich Islands region

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