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Moderate earthquake: M5.1 quake has struck near South Sandwich Islands region

Posted by admin on April 21, 2025 0 Comments

Earthquake location -56.1274S, -27.9666WA moderate earthquake magnitude 5.1 (ml/mb) has occurred on Monday, South Sandwich Islands region (0 miles). The earthquake occurred at a depth of 115.188 km (72 miles). The 5.1-magnitude earthquake has occurred at 15:46:59 / 3:46 pm (local time epicenter). Unique identifier: us7000pu0x. Ids that are associated to the event: us7000pu0x. Exact location of earthquake, longitude -27.9666 West, latitude -56.1274 South, depth = 115.188 km. Global date and time of event UTC/GMT: 21/04/25 / 2025-04-21 15:46:59 / April 21, 2025 @ 3:46 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

There are an estimated 1320 moderate quakes in the world each year. In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days five and in the last 365 days seventy-nine earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures.

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: South Sandwich Islands region. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 5.1 mb The magnitude for the event.
Longitude -27.9666° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -56.1274° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 115.188 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 2025-04-21 15:46:59 Time when the event occurred. UTC/GMT
Updated 2025-04-21 16:06:18 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 42 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 5.218 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.89 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 69 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 us7000pu0x Id of event.
Event Code 7000pu0x An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000pu0x, A comma-separated list of event ids that are associated to an event.

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