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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.8 mag was detected near South Sandwich Islands region

Posted by admin on November 12, 2025 0 Comments

Earthquake location -56.2113S, -27.0024WA light earthquake magnitude 4.8 (ml/mb) has struck on Tuesday, South Sandwich Islands region (0 miles). The epicenter of the earthquake was roughly 95.712 km (59 miles) below the earth’s surface. Date and time of earthquake in UTC/GMT: 21/10/25 / 2025-10-21 09:11:06 / October 21, 2025 @ 9:11 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: us6000rmt3. Ids that are associated to the event: us6000rmt3. Exact location of earthquake, longitude -27.0024 West, latitude -56.2113 South, depth = 95.712 km. The temblor was reported at 09:11:06 / 9:11 am (local time epicenter).

There are an estimated 13,000 light quakes 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 seven, in the last 10 days nine, in the past 30 days thirteen and in the last 365 days eighty-two earthquakes of magnitude 3.0 or greater that has struck near.

Did you feel the quake?

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: South Sandwich Islands region.

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More information

Parameter Value Description
Magnitude 4.8 mb The magnitude for the event.
Longitude -27.0024° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -56.2113° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 95.712 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 2025-10-21 09:11:06 Time when the event occurred. UTC/GMT
Updated 2025-11-12 07:14:50 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 354 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 23 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 5.759 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.95 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 76 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 us6000rmt3 Id of event.
Event Code 6000rmt3 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rmt3, A comma-separated list of event ids that are associated to an event.

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